I have a multihomed server. eth0 for internal NAT, eth1 for default
internet, and eth3 for VOIP.
VOIP comes into the server with dport set to 19999. What I'd like to do
is have all those VOIP packets set to a real VOIP port ( which I think I
can figure out ) and go out eth3. I can't set up a static route going
out eth3 since the SIP proxies are dynamic, so they don't have a fixed
ip address.
So:
iptables -t nat -A POSTROUTING -i eth0 -p udp --dport 19999 -j DNAT --to
:5469
iptables -t nat -A PREROUTING -i eth3 -p udp --dport 5469 -j DNAT --to
:19999
would change the port, but how can I tell it to use interface eth3?
sean
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