just compiling it does not break it but if you use it.
for example
kernel 2.6.11 ( no patches )
openswan 2.4.4
linux = 10.0.100.107 Crusoe
xp machine = 172.25.173.2
run the command ip route add 172.25.173.0/24 dev eth0 via 10.0.100.104
table sometable
verify the xp machine can talk to the linux box
ipsec/l2tp connection from the xp box using certificates fails
run
ip tables flush table sometable
route add -net 172.25.173.0 netmask 255.255.255.0 gw 10.0.100.104
ipsec/l2tp now works
Symbol: IP_MULTIPLE_TABLES [=n]
Prompt: IP: policy routing
Defined at net/ipv4/Kconfig:56
Depends on: NET && IP_ADVANCED_ROUTER
Location:
-> Device Drivers
-> Networking support
-> Networking support (NET [=y])
-> Networking options
-> TCP/IP networking (INET [=y])
-> IP: advanced router (IP_ADVANCED_ROUTER [=y])
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