29 Jun
2020
29 Jun
'20
6:21 p.m.
Hi
During the testing with Kamailio IMS, we found that SUBSCRIBE and NOTIFY message flow between UE and P-CSCF is shown below.
SUBSCRIBE and its response: 192.168.1.102:9101 (port-c) -> 192.168.2.66:6101 (port-s) NOTIFY: 192.168.2.66:5101 (port-c) -> 192.168.1.102:9100 (port-s)
based on the sip security, is it the expected behavior that they are using port-c and port-s?
The reason why we asked is because we found that the NOTIFY did not properly propagate to the UE due to different port addresses.
Does anyone have this experience? and how we can resolve it?
- RBK