Hi,
I'm using Kamailio 4.2.0 and I'm developing a SIP-based application. Today I made a test connecting two devices directly to an S7 sharing the Internet, I usually use a VPN even if they are both connected to the same network because in the future they will be in different networks.Without the VPN calls were not received. This has never happened to me, I have repeated tests and in an S6 it has also happened to me. So I have checked my Kamailio server and I have detected that when executing: kamctl ul show, the received field did not appear:
With VPN:
Contact:: sip:pruebaT@47.60.42.40:10924;transport=udp Q= Expires:: 1992 Callid:: iwNoYb~QR- Cseq:: 21 User-agent:: Unknown (belle-sip/1.6.1) Received:: sip:47.60.42.40:10924 State:: CS_NEW Flags:: 0 Cflag:: 64 Socket:: udp:10.0.0.4:5060 Methods:: 4294967295 Ruid:: uloc-5a9d9097-9fa-431c Instance:: urn:uuid:8b50dde3-d07f-4752-9a24-7b8ddf219a99 Reg-Id:: 0 Last-Keepalive:: 1539614732 Last-Modified:: 1539614732
Without VPN:
Contact:: sip:pruebaT@37.10.156.189:51163;transport=udp Q= Expires:: 1996 Callid:: webjvHycBs Cseq:: 21 User-agent:: Unknown (belle-sip/1.6.1) State:: CS_NEW Flags:: 0 Cflag:: 0 Socket:: udp:10.0.0.4:5060 Methods:: 4294967295 Ruid:: uloc-5a9d9097-9fc-1feb Instance:: urn:uuid:89306a81-e2d1-4b7a-8206-107e3cbc0688 Reg-Id:: 0 Last-Keepalive:: 1539614531 Last-Modified:: 1539614531
Would someone know why it happened? Thanks