Struggeling with the same problem as there is little to no documentation how to use STUN properly. I use the 1.2.13 and fiddled together a container for myself with drumsergio’s container and an included stuntman so it’s runnning in the same container. I set the cwmp.udpConnectionRequestPort to 3478 in Admin → Config and I have a populated InternetGatewayDevice.ManagementServer.STUNEnable to true and a populated InternetGatewayDevice.ManagementServer.UDPConnectionRequestAddress with a correct IP and port it got from the STUN server on the CPE.
I enabled debugging for this explicit CPE and I see 3 times this event (masked for privacy):
event: outgoing UDP message
timestamp: 2025-03-01T16:06:37.114Z
remoteAddress: x.x.x.x
deviceId: 1449BC-Vigor2135FVac-1449BCXXXX
remotePort: 46838
body: "GET http://x.x.x.x:46838?ts=1740845197&id=3247567587&un=acs-cpe&cn=de9839c1ddxxxxxx&sig=6bf0bfd6055358ee1708dce87700e8cc4dxxxxxx HTTP/1.1\r\nHost: x.x.x.x:46838\r\n\r\n"
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Which results in a “No contact from CPE” after the timeout.
I don’t know if it is an CPE- or acs-issue and there is this thread GenieACS works with STUN which points to acs