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For anyone going through the same problem, be sure that if you get this situation you force TCP Turn mode with query param '?transport=tcp' if you're using coturn, in our case for some clients their ISP stock default configuration of the router firewall and IDS system were the responsible of blocking the connections


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I got it working, finally, so I'll be answering my own question. The solution described as sequence of terminal commands is not permanent, it won't survive reboots or upgrades, but I wanted to focus pedagogically on the routing solution (that's the title of my question) and leave the permanence problems for a script at the end (more briefly explained, since ...


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Just to leave some information regarding how I eventually solved this... My reasoning was: if the SIP negotiation was successful, as made obvious by the packet captures, then it really wasn't a routing or firewall problem. I mean, it could still be a firewall problem, if it was letting some things through but not others (like other ports etc). But since I ...


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This is a task for 'policy based routing' Policy based routing allows you to configure complex routing scenarios. For example, you can route packets based on various criteria, such as the source address, packet metadata, and including protocol. I am not sure if it can be done on the UDM - but here is a link for the USG: https://help.ui.com/hc/en-us/articles/...


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