I have two WAN (uplink) connections to the internet called WAN and WAN_NTL. The WAN uplink is the primary (has a default gateway) and WAN_NTL is the secondary. I've been trying to set up a policy route to send some of my traffic via the WAN_NTL uplink with absolutely no joy.
I initially tried using two masquerading rules to masquerade the single internal interface to both connections and let the policy route determine which uplink was used. This seemed to kill the astaro box... I've rebuilt it twice and I've been trying to use a SNAT rule to provide translation for the packets that go to the WAN_NTL uplink but it either still routes the HTTP (using this for testing) traffic via the WAN interface or it doesn't route at all. When it doesn't work at all, I get the impression that either the SNAT or the policy route rule is being applied and that it's attempring to work but there's something that I'm not doing correctly...
Can anyone clarify whether I use MASQUERADING or SNAT to NAT the internal network to the secondary line? Has this worked for anyone else and If so could you let me know what I need to do to so I can route some of my internal traffic via the second uplink?
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