Jan Engelhardt escreveu:
It is not completely not related. By changing things such as nfmark, TOS field, source or destination address, routing can be influenced, so I would not say it's totally unrelated :)
Changing all these parameters will do nothing if you dont have appropriate routing rules that uses them as routing criteria parameters.
Well .... yes, it's not completly unrelated, iptables really can 'help' routing decisions with those things.
iptables can be used to help routing decisions, but this is not the only way of doing it. You can have your source routing rules and get advanced routing without iptables rules, it's not required, but yes can be used sometimes. On pretty advanced routing situations, maybe iptables 'helping' rules would be necessary, but advanced routing can be done without iptables.
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