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648 lines
25 KiB
648 lines
25 KiB
#
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# Network configuration
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#
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menu "Networking support"
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config NET
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bool "Networking support"
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---help---
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Unless you really know what you are doing, you should say Y here.
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The reason is that some programs need kernel networking support even
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when running on a stand-alone machine that isn't connected to any
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other computer. If you are upgrading from an older kernel, you
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should consider updating your networking tools too because changes
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in the kernel and the tools often go hand in hand. The tools are
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contained in the package net-tools, the location and version number
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of which are given in <file:Documentation/Changes>.
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For a general introduction to Linux networking, it is highly
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recommended to read the NET-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>.
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menu "Networking options"
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depends on NET
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config PACKET
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tristate "Packet socket"
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---help---
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The Packet protocol is used by applications which communicate
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directly with network devices without an intermediate network
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protocol implemented in the kernel, e.g. tcpdump. If you want them
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to work, choose Y.
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To compile this driver as a module, choose M here: the module will
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be called af_packet.
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If unsure, say Y.
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config PACKET_MMAP
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bool "Packet socket: mmapped IO"
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depends on PACKET
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help
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If you say Y here, the Packet protocol driver will use an IO
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mechanism that results in faster communication.
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If unsure, say N.
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config UNIX
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tristate "Unix domain sockets"
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---help---
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If you say Y here, you will include support for Unix domain sockets;
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sockets are the standard Unix mechanism for establishing and
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accessing network connections. Many commonly used programs such as
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the X Window system and syslog use these sockets even if your
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machine is not connected to any network. Unless you are working on
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an embedded system or something similar, you therefore definitely
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want to say Y here.
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To compile this driver as a module, choose M here: the module will be
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called unix. Note that several important services won't work
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correctly if you say M here and then neglect to load the module.
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Say Y unless you know what you are doing.
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config NET_KEY
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tristate "PF_KEY sockets"
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select XFRM
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---help---
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PF_KEYv2 socket family, compatible to KAME ones.
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They are required if you are going to use IPsec tools ported
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from KAME.
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Say Y unless you know what you are doing.
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config INET
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bool "TCP/IP networking"
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---help---
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These are the protocols used on the Internet and on most local
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Ethernets. It is highly recommended to say Y here (this will enlarge
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your kernel by about 144 KB), since some programs (e.g. the X window
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system) use TCP/IP even if your machine is not connected to any
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other computer. You will get the so-called loopback device which
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allows you to ping yourself (great fun, that!).
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For an excellent introduction to Linux networking, please read the
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Linux Networking HOWTO, available from
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<http://www.tldp.org/docs.html#howto>.
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If you say Y here and also to "/proc file system support" and
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"Sysctl support" below, you can change various aspects of the
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behavior of the TCP/IP code by writing to the (virtual) files in
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/proc/sys/net/ipv4/*; the options are explained in the file
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<file:Documentation/networking/ip-sysctl.txt>.
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Short answer: say Y.
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source "net/ipv4/Kconfig"
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# IPv6 as module will cause a CRASH if you try to unload it
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config IPV6
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tristate "The IPv6 protocol"
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depends on INET
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default m
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select CRYPTO if IPV6_PRIVACY
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select CRYPTO_MD5 if IPV6_PRIVACY
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---help---
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This is complemental support for the IP version 6.
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You will still be able to do traditional IPv4 networking as well.
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For general information about IPv6, see
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<http://playground.sun.com/pub/ipng/html/ipng-main.html>.
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For Linux IPv6 development information, see <http://www.linux-ipv6.org>.
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For specific information about IPv6 under Linux, read the HOWTO at
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<http://www.bieringer.de/linux/IPv6/>.
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To compile this protocol support as a module, choose M here: the
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module will be called ipv6.
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source "net/ipv6/Kconfig"
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menuconfig NETFILTER
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bool "Network packet filtering (replaces ipchains)"
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---help---
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Netfilter is a framework for filtering and mangling network packets
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that pass through your Linux box.
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The most common use of packet filtering is to run your Linux box as
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a firewall protecting a local network from the Internet. The type of
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firewall provided by this kernel support is called a "packet
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filter", which means that it can reject individual network packets
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based on type, source, destination etc. The other kind of firewall,
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a "proxy-based" one, is more secure but more intrusive and more
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bothersome to set up; it inspects the network traffic much more
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closely, modifies it and has knowledge about the higher level
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protocols, which a packet filter lacks. Moreover, proxy-based
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firewalls often require changes to the programs running on the local
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clients. Proxy-based firewalls don't need support by the kernel, but
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they are often combined with a packet filter, which only works if
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you say Y here.
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You should also say Y here if you intend to use your Linux box as
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the gateway to the Internet for a local network of machines without
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globally valid IP addresses. This is called "masquerading": if one
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of the computers on your local network wants to send something to
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the outside, your box can "masquerade" as that computer, i.e. it
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forwards the traffic to the intended outside destination, but
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modifies the packets to make it look like they came from the
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firewall box itself. It works both ways: if the outside host
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replies, the Linux box will silently forward the traffic to the
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correct local computer. This way, the computers on your local net
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are completely invisible to the outside world, even though they can
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reach the outside and can receive replies. It is even possible to
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run globally visible servers from within a masqueraded local network
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using a mechanism called portforwarding. Masquerading is also often
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called NAT (Network Address Translation).
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Another use of Netfilter is in transparent proxying: if a machine on
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the local network tries to connect to an outside host, your Linux
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box can transparently forward the traffic to a local server,
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typically a caching proxy server.
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Yet another use of Netfilter is building a bridging firewall. Using
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a bridge with Network packet filtering enabled makes iptables "see"
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the bridged traffic. For filtering on the lower network and Ethernet
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protocols over the bridge, use ebtables (under bridge netfilter
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configuration).
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Various modules exist for netfilter which replace the previous
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masquerading (ipmasqadm), packet filtering (ipchains), transparent
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proxying, and portforwarding mechanisms. Please see
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<file:Documentation/Changes> under "iptables" for the location of
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these packages.
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Make sure to say N to "Fast switching" below if you intend to say Y
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here, as Fast switching currently bypasses netfilter.
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Chances are that you should say Y here if you compile a kernel which
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will run as a router and N for regular hosts. If unsure, say N.
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if NETFILTER
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config NETFILTER_DEBUG
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bool "Network packet filtering debugging"
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depends on NETFILTER
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help
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You can say Y here if you want to get additional messages useful in
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debugging the netfilter code.
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config BRIDGE_NETFILTER
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bool "Bridged IP/ARP packets filtering"
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depends on BRIDGE && NETFILTER && INET
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default y
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---help---
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Enabling this option will let arptables resp. iptables see bridged
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ARP resp. IP traffic. If you want a bridging firewall, you probably
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want this option enabled.
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Enabling or disabling this option doesn't enable or disable
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ebtables.
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If unsure, say N.
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source "net/ipv4/netfilter/Kconfig"
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source "net/ipv6/netfilter/Kconfig"
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source "net/decnet/netfilter/Kconfig"
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source "net/bridge/netfilter/Kconfig"
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endif
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config XFRM
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bool
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depends on NET
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source "net/xfrm/Kconfig"
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source "net/sctp/Kconfig"
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config ATM
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tristate "Asynchronous Transfer Mode (ATM) (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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---help---
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ATM is a high-speed networking technology for Local Area Networks
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and Wide Area Networks. It uses a fixed packet size and is
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connection oriented, allowing for the negotiation of minimum
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bandwidth requirements.
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In order to participate in an ATM network, your Linux box needs an
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ATM networking card. If you have that, say Y here and to the driver
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of your ATM card below.
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Note that you need a set of user-space programs to actually make use
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of ATM. See the file <file:Documentation/networking/atm.txt> for
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further details.
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config ATM_CLIP
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tristate "Classical IP over ATM (EXPERIMENTAL)"
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depends on ATM && INET
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help
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Classical IP over ATM for PVCs and SVCs, supporting InARP and
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ATMARP. If you want to communication with other IP hosts on your ATM
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network, you will typically either say Y here or to "LAN Emulation
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(LANE)" below.
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config ATM_CLIP_NO_ICMP
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bool "Do NOT send ICMP if no neighbour (EXPERIMENTAL)"
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depends on ATM_CLIP
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help
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Normally, an "ICMP host unreachable" message is sent if a neighbour
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cannot be reached because there is no VC to it in the kernel's
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ATMARP table. This may cause problems when ATMARP table entries are
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briefly removed during revalidation. If you say Y here, packets to
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such neighbours are silently discarded instead.
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config ATM_LANE
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tristate "LAN Emulation (LANE) support (EXPERIMENTAL)"
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depends on ATM
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help
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LAN Emulation emulates services of existing LANs across an ATM
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network. Besides operating as a normal ATM end station client, Linux
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LANE client can also act as an proxy client bridging packets between
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ELAN and Ethernet segments. You need LANE if you want to try MPOA.
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config ATM_MPOA
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tristate "Multi-Protocol Over ATM (MPOA) support (EXPERIMENTAL)"
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depends on ATM && INET && ATM_LANE!=n
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help
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Multi-Protocol Over ATM allows ATM edge devices such as routers,
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bridges and ATM attached hosts establish direct ATM VCs across
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subnetwork boundaries. These shortcut connections bypass routers
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enhancing overall network performance.
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config ATM_BR2684
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tristate "RFC1483/2684 Bridged protocols"
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depends on ATM && INET
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help
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ATM PVCs can carry ethernet PDUs according to rfc2684 (formerly 1483)
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This device will act like an ethernet from the kernels point of view,
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with the traffic being carried by ATM PVCs (currently 1 PVC/device).
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This is sometimes used over DSL lines. If in doubt, say N.
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config ATM_BR2684_IPFILTER
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bool "Per-VC IP filter kludge"
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depends on ATM_BR2684
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help
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This is an experimental mechanism for users who need to terminating a
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large number of IP-only vcc's. Do not enable this unless you are sure
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you know what you are doing.
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config BRIDGE
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tristate "802.1d Ethernet Bridging"
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---help---
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If you say Y here, then your Linux box will be able to act as an
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Ethernet bridge, which means that the different Ethernet segments it
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is connected to will appear as one Ethernet to the participants.
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Several such bridges can work together to create even larger
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networks of Ethernets using the IEEE 802.1 spanning tree algorithm.
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As this is a standard, Linux bridges will cooperate properly with
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other third party bridge products.
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In order to use the Ethernet bridge, you'll need the bridge
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configuration tools; see <file:Documentation/networking/bridge.txt>
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for location. Please read the Bridge mini-HOWTO for more
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information.
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If you enable iptables support along with the bridge support then you
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turn your bridge into a bridging IP firewall.
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iptables will then see the IP packets being bridged, so you need to
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take this into account when setting up your firewall rules.
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Enabling arptables support when bridging will let arptables see
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bridged ARP traffic in the arptables FORWARD chain.
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To compile this code as a module, choose M here: the module
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will be called bridge.
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If unsure, say N.
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config VLAN_8021Q
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tristate "802.1Q VLAN Support"
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---help---
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Select this and you will be able to create 802.1Q VLAN interfaces
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on your ethernet interfaces. 802.1Q VLAN supports almost
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everything a regular ethernet interface does, including
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firewalling, bridging, and of course IP traffic. You will need
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the 'vconfig' tool from the VLAN project in order to effectively
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use VLANs. See the VLAN web page for more information:
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<http://www.candelatech.com/~greear/vlan.html>
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To compile this code as a module, choose M here: the module
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will be called 8021q.
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If unsure, say N.
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config DECNET
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tristate "DECnet Support"
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---help---
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The DECnet networking protocol was used in many products made by
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Digital (now Compaq). It provides reliable stream and sequenced
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packet communications over which run a variety of services similar
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to those which run over TCP/IP.
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To find some tools to use with the kernel layer support, please
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look at Patrick Caulfield's web site:
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<http://linux-decnet.sourceforge.net/>.
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More detailed documentation is available in
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<file:Documentation/networking/decnet.txt>.
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Be sure to say Y to "/proc file system support" and "Sysctl support"
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below when using DECnet, since you will need sysctl support to aid
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in configuration at run time.
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The DECnet code is also available as a module ( = code which can be
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inserted in and removed from the running kernel whenever you want).
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The module is called decnet.
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source "net/decnet/Kconfig"
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source "net/llc/Kconfig"
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config IPX
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tristate "The IPX protocol"
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select LLC
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---help---
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This is support for the Novell networking protocol, IPX, commonly
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used for local networks of Windows machines. You need it if you
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want to access Novell NetWare file or print servers using the Linux
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Novell client ncpfs (available from
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<ftp://platan.vc.cvut.cz/pub/linux/ncpfs/>) or from
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within the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO,
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available from <http://www.tldp.org/docs.html#howto>). In order
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to do the former, you'll also have to say Y to "NCP file system
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support", below.
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IPX is similar in scope to IP, while SPX, which runs on top of IPX,
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is similar to TCP. There is also experimental support for SPX in
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Linux (see "SPX networking", below).
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To turn your Linux box into a fully featured NetWare file server and
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IPX router, say Y here and fetch either lwared from
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<ftp://ibiblio.org/pub/Linux/system/network/daemons/> or
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mars_nwe from <ftp://www.compu-art.de/mars_nwe/>. For more
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information, read the IPX-HOWTO available from
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<http://www.tldp.org/docs.html#howto>.
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General information about how to connect Linux, Windows machines and
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Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>.
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The IPX driver would enlarge your kernel by about 16 KB. To compile
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this driver as a module, choose M here: the module will be called ipx.
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Unless you want to integrate your Linux box with a local Novell
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network, say N.
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source "net/ipx/Kconfig"
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config ATALK
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tristate "Appletalk protocol support"
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select LLC
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---help---
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AppleTalk is the protocol that Apple computers can use to communicate
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on a network. If your Linux box is connected to such a network and you
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wish to connect to it, say Y. You will need to use the netatalk package
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so that your Linux box can act as a print and file server for Macs as
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well as access AppleTalk printers. Check out
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<http://www.zettabyte.net/netatalk/> on the WWW for details.
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EtherTalk is the name used for AppleTalk over Ethernet and the
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cheaper and slower LocalTalk is AppleTalk over a proprietary Apple
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network using serial links. EtherTalk and LocalTalk are fully
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supported by Linux.
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General information about how to connect Linux, Windows machines and
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Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>. The
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NET-3-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>, contains valuable
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information as well.
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To compile this driver as a module, choose M here: the module will be
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called appletalk. You almost certainly want to compile it as a
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module so you can restart your AppleTalk stack without rebooting
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your machine. I hear that the GNU boycott of Apple is over, so
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even politically correct people are allowed to say Y here.
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source "drivers/net/appletalk/Kconfig"
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config X25
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tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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---help---
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X.25 is a set of standardized network protocols, similar in scope to
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frame relay; the one physical line from your box to the X.25 network
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entry point can carry several logical point-to-point connections
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(called "virtual circuits") to other computers connected to the X.25
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network. Governments, banks, and other organizations tend to use it
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to connect to each other or to form Wide Area Networks (WANs). Many
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countries have public X.25 networks. X.25 consists of two
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protocols: the higher level Packet Layer Protocol (PLP) (say Y here
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if you want that) and the lower level data link layer protocol LAPB
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(say Y to "LAPB Data Link Driver" below if you want that).
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You can read more about X.25 at <http://www.sangoma.com/x25.htm> and
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<http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm>.
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Information about X.25 for Linux is contained in the files
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<file:Documentation/networking/x25.txt> and
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<file:Documentation/networking/x25-iface.txt>.
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One connects to an X.25 network either with a dedicated network card
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using the X.21 protocol (not yet supported by Linux) or one can do
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X.25 over a standard telephone line using an ordinary modem (say Y
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to "X.25 async driver" below) or over Ethernet using an ordinary
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Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link
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Driver" and "LAPB over Ethernet driver" below).
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To compile this driver as a module, choose M here: the module
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will be called x25. If unsure, say N.
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config LAPB
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tristate "LAPB Data Link Driver (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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---help---
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Link Access Procedure, Balanced (LAPB) is the data link layer (i.e.
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the lower) part of the X.25 protocol. It offers a reliable
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connection service to exchange data frames with one other host, and
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it is used to transport higher level protocols (mostly X.25 Packet
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Layer, the higher part of X.25, but others are possible as well).
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Usually, LAPB is used with specialized X.21 network cards, but Linux
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currently supports LAPB only over Ethernet connections. If you want
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to use LAPB connections over Ethernet, say Y here and to "LAPB over
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Ethernet driver" below. Read
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<file:Documentation/networking/lapb-module.txt> for technical
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details.
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To compile this driver as a module, choose M here: the
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module will be called lapb. If unsure, say N.
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config NET_DIVERT
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bool "Frame Diverter (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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---help---
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The Frame Diverter allows you to divert packets from the
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network, that are not aimed at the interface receiving it (in
|
|
promisc. mode). Typically, a Linux box setup as an Ethernet bridge
|
|
with the Frames Diverter on, can do some *really* transparent www
|
|
caching using a Squid proxy for example.
|
|
|
|
This is very useful when you don't want to change your router's
|
|
config (or if you simply don't have access to it).
|
|
|
|
The other possible usages of diverting Ethernet Frames are
|
|
numberous:
|
|
- reroute smtp traffic to another interface
|
|
- traffic-shape certain network streams
|
|
- transparently proxy smtp connections
|
|
- etc...
|
|
|
|
For more informations, please refer to:
|
|
<http://diverter.sourceforge.net/>
|
|
<http://perso.wanadoo.fr/magpie/EtherDivert.html>
|
|
|
|
If unsure, say N.
|
|
|
|
config ECONET
|
|
tristate "Acorn Econet/AUN protocols (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL && INET
|
|
---help---
|
|
Econet is a fairly old and slow networking protocol mainly used by
|
|
Acorn computers to access file and print servers. It uses native
|
|
Econet network cards. AUN is an implementation of the higher level
|
|
parts of Econet that runs over ordinary Ethernet connections, on
|
|
top of the UDP packet protocol, which in turn runs on top of the
|
|
Internet protocol IP.
|
|
|
|
If you say Y here, you can choose with the next two options whether
|
|
to send Econet/AUN traffic over a UDP Ethernet connection or over
|
|
a native Econet network card.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called econet.
|
|
|
|
config ECONET_AUNUDP
|
|
bool "AUN over UDP"
|
|
depends on ECONET
|
|
help
|
|
Say Y here if you want to send Econet/AUN traffic over a UDP
|
|
connection (UDP is a packet based protocol that runs on top of the
|
|
Internet protocol IP) using an ordinary Ethernet network card.
|
|
|
|
config ECONET_NATIVE
|
|
bool "Native Econet"
|
|
depends on ECONET
|
|
help
|
|
Say Y here if you have a native Econet network card installed in
|
|
your computer.
|
|
|
|
config WAN_ROUTER
|
|
tristate "WAN router"
|
|
depends on EXPERIMENTAL
|
|
---help---
|
|
Wide Area Networks (WANs), such as X.25, frame relay and leased
|
|
lines, are used to interconnect Local Area Networks (LANs) over vast
|
|
distances with data transfer rates significantly higher than those
|
|
achievable with commonly used asynchronous modem connections.
|
|
Usually, a quite expensive external device called a `WAN router' is
|
|
needed to connect to a WAN.
|
|
|
|
As an alternative, WAN routing can be built into the Linux kernel.
|
|
With relatively inexpensive WAN interface cards available on the
|
|
market, a perfectly usable router can be built for less than half
|
|
the price of an external router. If you have one of those cards and
|
|
wish to use your Linux box as a WAN router, say Y here and also to
|
|
the WAN driver for your card, below. You will then need the
|
|
wan-tools package which is available from <ftp://ftp.sangoma.com/>.
|
|
Read <file:Documentation/networking/wan-router.txt> for more
|
|
information.
|
|
|
|
To compile WAN routing support as a module, choose M here: the
|
|
module will be called wanrouter.
|
|
|
|
If unsure, say N.
|
|
|
|
menu "QoS and/or fair queueing"
|
|
|
|
config NET_SCHED
|
|
bool "QoS and/or fair queueing"
|
|
---help---
|
|
When the kernel has several packets to send out over a network
|
|
device, it has to decide which ones to send first, which ones to
|
|
delay, and which ones to drop. This is the job of the packet
|
|
scheduler, and several different algorithms for how to do this
|
|
"fairly" have been proposed.
|
|
|
|
If you say N here, you will get the standard packet scheduler, which
|
|
is a FIFO (first come, first served). If you say Y here, you will be
|
|
able to choose from among several alternative algorithms which can
|
|
then be attached to different network devices. This is useful for
|
|
example if some of your network devices are real time devices that
|
|
need a certain minimum data flow rate, or if you need to limit the
|
|
maximum data flow rate for traffic which matches specified criteria.
|
|
This code is considered to be experimental.
|
|
|
|
To administer these schedulers, you'll need the user-level utilities
|
|
from the package iproute2+tc at <ftp://ftp.tux.org/pub/net/ip-routing/>.
|
|
That package also contains some documentation; for more, check out
|
|
<http://snafu.freedom.org/linux2.2/iproute-notes.html>.
|
|
|
|
This Quality of Service (QoS) support will enable you to use
|
|
Differentiated Services (diffserv) and Resource Reservation Protocol
|
|
(RSVP) on your Linux router if you also say Y to "QoS support",
|
|
"Packet classifier API" and to some classifiers below. Documentation
|
|
and software is at <http://diffserv.sourceforge.net/>.
|
|
|
|
If you say Y here and to "/proc file system" below, you will be able
|
|
to read status information about packet schedulers from the file
|
|
/proc/net/psched.
|
|
|
|
The available schedulers are listed in the following questions; you
|
|
can say Y to as many as you like. If unsure, say N now.
|
|
|
|
source "net/sched/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Network testing"
|
|
|
|
config NET_PKTGEN
|
|
tristate "Packet Generator (USE WITH CAUTION)"
|
|
depends on PROC_FS
|
|
---help---
|
|
This module will inject preconfigured packets, at a configurable
|
|
rate, out of a given interface. It is used for network interface
|
|
stress testing and performance analysis. If you don't understand
|
|
what was just said, you don't need it: say N.
|
|
|
|
Documentation on how to use the packet generator can be found
|
|
at <file:Documentation/networking/pktgen.txt>.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called pktgen.
|
|
|
|
endmenu
|
|
|
|
endmenu
|
|
|
|
config NETPOLL
|
|
def_bool NETCONSOLE
|
|
|
|
config NETPOLL_RX
|
|
bool "Netpoll support for trapping incoming packets"
|
|
default n
|
|
depends on NETPOLL
|
|
|
|
config NETPOLL_TRAP
|
|
bool "Netpoll traffic trapping"
|
|
default n
|
|
depends on NETPOLL
|
|
|
|
config NET_POLL_CONTROLLER
|
|
def_bool NETPOLL
|
|
|
|
source "net/ax25/Kconfig"
|
|
|
|
source "net/irda/Kconfig"
|
|
|
|
source "net/bluetooth/Kconfig"
|
|
|
|
source "net/ieee80211/Kconfig"
|
|
|
|
source "drivers/net/Kconfig"
|
|
|
|
endmenu
|
|
|
|
|