[Freeswitch-users] Freswitch closes UDP port after OPTIONS with TLS?

Hello, I have the following problem: Every call stops after 30 seconds when TLS is enabled. SIP/RTP and SIP/SRTP works but not TLS/SRTP. The phones are behind NAT. So I expect, that every 30 seconds an Options request is sent. Wiresharking the traffic I can see * that there are ongoing UDP packets. * Then a TSLv1 packet ist sent from FS to the Phone. * This is acknowleged by the phone * Next the phone send another UDP packet to the same FS port as before * Then the Phone receives an ICMP request that the FS port is closed. Anybody has a clue about this? Best regards Peter