(System Fedora 31)
I'm looking to make routing decisions based upon either the source or
destination TCP port and interface/destination IP, in the Cisco world
I'd do this via policy based routing.
I found an example using iptables
https://www.sparksupport.com/blog/2010/10/02/application-based-routing-in-linux_port-based-routing/
however this system is running firewalld and I haven't found an example
(yet) using firewalld.
Very specifically if I receive traffic on TCP port 1234 I do not want to
use my system defined default gateway, rather I want to use an alternate
gateway which will be via an OpenVPN tunnel. I would really like to go
one step further an if it was received on port 1234 AND interface X then
use gateway 1, if it was port 1234 and interface Y use gateway 2, not
sure how far down the rabbit hole I can go. What I am trying to avoid
is have an asymmetric routing condition when I have a firewall fronting
the different interfaces.
Thanks, Jeff
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