Linux ip route matching the source ip

Question

I would like to know if it's possible to tell a Linux kernel to route all packets destinated to X via interface/ip Y but only in case the source IP address would be a specific one.

Any idea if this is possible?

Thanks and regards,

score 6 · Answer 1 · edited Jun 11 '20 at 10:02

6

Yes that's called source routing :

ip rule add from 10.0.0.10 table toto

ip route add default via 88.88.88.88 dev eth1 table toto

You can have more informations here :

source routing in the lartc guide

edited Jun 11 '20 at 10:02

Community

1

answered Jan 20 '11 at 22:55

profy

1,126
9
19

score 1 · Answer 2 · answered Jan 20 '11 at 16:32

1

Any routing decisions based not on destination IP address called PBR (policy-based routing). Usually, PBR is implemented via firewall, so look for possibility to change out interface for packet in iptables.

answered Jan 20 '11 at 16:32

gelraen

2,311
20
19

Linux ip route matching the source ip

2 Answers2