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Is it possible to route all outgoing requests for SSH (port 22) to mydynamicdns.afraid.org via wlan0 instead of eth0 when both are connected?

Since my IP is dynamic, I would like to use a name instead of IP.

1 Answer 1

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Yes, you could mark all packets matches such policy, and control the route like this,

# Set mark for out going packets
iptables -t mangle -A OUTPUT -d mydynamicdns.afraid.org -j MARK --set-mark 1

# Route all packets with mark 1 through wlan0
ip rule add fwmark 1 table 1
ip route add XXX table 1 dev wlan0

P.S The rule would not work if DNS resolution fails

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  • Thanks, I am using Ubuntu, will this work? Is IPTABLES a file that I can hand edit?
    – JorgeeFG
    Mar 3, 2013 at 1:24
  • @Jorge it's a set of command
    – daisy
    Mar 3, 2013 at 1:41
  • Thanks, how can I see the rules I have added and/or delete them?
    – JorgeeFG
    Mar 3, 2013 at 16:30
  • @Jorge ip rule; iptables -t mangle -L; ip route
    – daisy
    Mar 4, 2013 at 0:00

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