Hello, I have a few places where using a SIP (or webrtc) endpoint demands opening up the very restrictive local network firewall. Setting rtp port range would be the way to go, however usually the simple math (e.g. setting the range for 2x the number of endpoints) is still not welcomed by local network admins - paranoid ones :) My idea here is whether we could use SO_REUSEPORT in the RTP stack (I've found in sofia lib the conditional use of this option) and possibly setting a very short range for RTP or even setting only one port (I'm not sure about RTCP) as from the other side packets come from the same IP but from different port, e.g. IPclient:PortA -> IPFSserver:PortX IPclient:PortB -> IPFSserver:PortX IPclient:PortC -> IPFSserver:PortX etc. What do you think, would it be doable? If not, any other way to rapidly lower the port range to be set at the endpoint side? Regards, Jalsot