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#
# Network configuration
#

menu "Networking"

config NET
        bool "Networking support"
        ---help---
          Unless you really know what you are doing, you should say Y here.
          The reason is that some programs need kernel networking support even
          when running on a stand-alone machine that isn't connected to any
          other computer.
          
          If you are upgrading from an older kernel, you
          should consider updating your networking tools too because changes
          in the kernel and the tools often go hand in hand. The tools are
          contained in the package net-tools, the location and version number
          of which are given in <file:Documentation/Changes>.

          For a general introduction to Linux networking, it is highly
          recommended to read the NET-HOWTO, available from
          <http://www.tldp.org/docs.html#howto>.

# Make sure that all config symbols are dependent on NET
if NET

menu "Networking options"

config NET_NS
        bool "Network namespace support"
        default n
        depends on EXPERIMENTAL && !SYSFS
        help
          Allow user space to create what appear to be multiple instances
          of the network stack.

source "net/packet/Kconfig"
source "net/unix/Kconfig"
source "net/xfrm/Kconfig"
source "net/iucv/Kconfig"

config INET
        bool "TCP/IP networking"
        ---help---
          These are the protocols used on the Internet and on most local
          Ethernets. It is highly recommended to say Y here (this will enlarge
          your kernel by about 144 KB), since some programs (e.g. the X window
          system) use TCP/IP even if your machine is not connected to any
          other computer. You will get the so-called loopback device which
          allows you to ping yourself (great fun, that!).

          For an excellent introduction to Linux networking, please read the
          Linux Networking HOWTO, available from
          <http://www.tldp.org/docs.html#howto>.

          If you say Y here and also to "/proc file system support" and
          "Sysctl support" below, you can change various aspects of the
          behavior of the TCP/IP code by writing to the (virtual) files in
          /proc/sys/net/ipv4/*; the options are explained in the file
          <file:Documentation/networking/ip-sysctl.txt>.

          Short answer: say Y.

if INET
source "net/ipv4/Kconfig"
source "net/ipv6/Kconfig"
source "net/netlabel/Kconfig"

endif # if INET

config NETWORK_SECMARK
        bool "Security Marking"
        help
          This enables security marking of network packets, similar
          to nfmark, but designated for security purposes.
          If you are unsure how to answer this question, answer N.

menuconfig NETFILTER
        bool "Network packet filtering framework (Netfilter)"
        ---help---
          Netfilter is a framework for filtering and mangling network packets
          that pass through your Linux box.

          The most common use of packet filtering is to run your Linux box as
          a firewall protecting a local network from the Internet. The type of
          firewall provided by this kernel support is called a "packet
          filter", which means that it can reject individual network packets
          based on type, source, destination etc. The other kind of firewall,
          a "proxy-based" one, is more secure but more intrusive and more
          bothersome to set up; it inspects the network traffic much more
          closely, modifies it and has knowledge about the higher level
          protocols, which a packet filter lacks. Moreover, proxy-based
          firewalls often require changes to the programs running on the local
          clients. Proxy-based firewalls don't need support by the kernel, but
          they are often combined with a packet filter, which only works if
          you say Y here.

          You should also say Y here if you intend to use your Linux box as
          the gateway to the Internet for a local network of machines without
          globally valid IP addresses. This is called "masquerading": if one
          of the computers on your local network wants to send something to
          the outside, your box can "masquerade" as that computer, i.e. it
          forwards the traffic to the intended outside destination, but
          modifies the packets to make it look like they came from the
          firewall box itself. It works both ways: if the outside host
          replies, the Linux box will silently forward the traffic to the
          correct local computer. This way, the computers on your local net
          are completely invisible to the outside world, even though they can
          reach the outside and can receive replies. It is even possible to
          run globally visible servers from within a masqueraded local network
          using a mechanism called portforwarding. Masquerading is also often
          called NAT (Network Address Translation).

          Another use of Netfilter is in transparent proxying: if a machine on
          the local network tries to connect to an outside host, your Linux
          box can transparently forward the traffic to a local server,
          typically a caching proxy server.

          Yet another use of Netfilter is building a bridging firewall. Using
          a bridge with Network packet filtering enabled makes iptables "see"
          the bridged traffic. For filtering on the lower network and Ethernet
          protocols over the bridge, use ebtables (under bridge netfilter
          configuration).

          Various modules exist for netfilter which replace the previous
          masquerading (ipmasqadm), packet filtering (ipchains), transparent
          proxying, and portforwarding mechanisms. Please see
          <file:Documentation/Changes> under "iptables" for the location of
          these packages.

          Make sure to say N to "Fast switching" below if you intend to say Y
          here, as Fast switching currently bypasses netfilter.

          Chances are that you should say Y here if you compile a kernel which
          will run as a router and N for regular hosts. If unsure, say N.

if NETFILTER

config NETFILTER_DEBUG
        bool "Network packet filtering debugging"
        depends on NETFILTER
        help
          You can say Y here if you want to get additional messages useful in
          debugging the netfilter code.

config BRIDGE_NETFILTER
        bool "Bridged IP/ARP packets filtering"
        depends on BRIDGE && NETFILTER && INET
        default y
        ---help---
          Enabling this option will let arptables resp. iptables see bridged
          ARP resp. IP traffic. If you want a bridging firewall, you probably
          want this option enabled.
          Enabling or disabling this option doesn't enable or disable
          ebtables.

          If unsure, say N.

source "net/netfilter/Kconfig"
source "net/ipv4/netfilter/Kconfig"
source "net/ipv6/netfilter/Kconfig"
source "net/decnet/netfilter/Kconfig"
source "net/bridge/netfilter/Kconfig"

endif

source "net/dccp/Kconfig"
source "net/sctp/Kconfig"
source "net/tipc/Kconfig"
source "net/atm/Kconfig"
source "net/bridge/Kconfig"
source "net/8021q/Kconfig"
source "net/decnet/Kconfig"
source "net/llc/Kconfig"
source "net/ipx/Kconfig"
source "drivers/net/appletalk/Kconfig"
source "net/x25/Kconfig"
source "net/lapb/Kconfig"
source "net/econet/Kconfig"
source "net/wanrouter/Kconfig"
source "net/sched/Kconfig"

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.

config NET_TCPPROBE
        tristate "TCP connection probing"
        depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
        ---help---
        This module allows for capturing the changes to TCP connection
        state in response to incoming packets. It is used for debugging
        TCP congestion avoidance modules. If you don't understand
        what was just said, you don't need it: say N.

        Documentation on how to use TCP connection probing can be found
        at http://linux-net.osdl.org/index.php/TcpProbe

        To compile this code as a module, choose M here: the
        module will be called tcp_probe.

endmenu

endmenu

source "net/ax25/Kconfig"
source "net/irda/Kconfig"
source "net/bluetooth/Kconfig"
source "net/rxrpc/Kconfig"

config FIB_RULES
        bool

menu "Wireless"
        depends on !S390

source "net/wireless/Kconfig"
source "net/mac80211/Kconfig"
source "net/ieee80211/Kconfig"

endmenu

source "net/rfkill/Kconfig"
source "net/9p/Kconfig"

endif   # if NET
endmenu # Networking