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I have a linux server that needs to get some routing. I'm fairly new at this and i don't find any clear source on google.
The setup should be simple:
All traffic to a server on ip 192.168.72.20 should be sent over interface 3.
All other interfaces don't matter at the moment.
Here you have the output for route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.72.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.72.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.72.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2
192.168.72.0 0.0.0.0 255.255.255.0 U 0 0 0 eth3
192.168.72.0 0.0.0.0 255.255.255.0 U 0 0 0 eth4
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
0.0.0.0 192.168.72.12 0.0.0.0 UG 0 0 0 eth0
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i don't know, i guess the old ones, how can i check that? – Frederiek Mar 29 '13 at 13:58
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Try:
ip route add 192.168.72.20/32 dev eth3
answered Mar 29 '13 at 13:48
LawrenceC
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3Just a note: to permanently keep this configuration make sure you add it to
/etc/rc.localor your distro's equivalent. It won't persist between reboots. – LawrenceC Mar 29 '13 at 16:32 -
1I tried this same format for mapping an IP to the wlan0 on Ubuntu 14.04 and got
RTNETLINK answers: Invalid argumentI had to remove the /** from the IP so I ended up with:sudo ip route add 192.168.50.15 dev wlan0-- thought I'd mention that in case anyone else ran into this issue. Thank you for your answer ultrasawblade, it was helpful. – mason81 Jul 10 '15 at 14:54
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3Do not forget
via <gateway_ip>if the target IP is not directly reachable! – calandoa Dec 4 '17 at 15:00
route add -host 192.168.72.20 GW eth3_ip) – Hennes Mar 29 '13 at 13:48