UDP 5090
Synopsis
- 3CX Phone System (VoIP PBX) uses UDP port 5090 for its 3CX Tunnel/Proxy service, which encapsulates SIP/RTP to traverse NAT and firewalls.
- The 3CX Session Border Controller (SBC) communicates with the 3CX PBX over UDP 5090 (and TCP 5090), commonly used for remote branch phones.
- 3CX mobile and desktop clients can also use UDP 5090 when the “Tunnel” option is enabled to connect back to the PBX.
Observed activity
Last 30 days
Detailed chart