RUT240 SIP Issues

Networking Solutions
1

Hi Team,
Having issues with SIP on RUT240.
I have tried everything I have found on the community pages, conntrack, removal of nathelper packages etc, but still getting the following errors from SIP ALG checker:

Test Type Port From To Time Public Address Test Result

1 SIP REGISTER UDP 5060 5060 3 Failed. No response
2 SIP REGISTER UDP 5060 6060 0 1.147.70.50:1668 Pass
3 SIP REGISTER UDP 6060 5060 3 Failed. No response
4 SIP REGISTER UDP 6060 6060 0 1.147.70.50:1708 Pass
5 SIP INVITE UDP 5060 5060 0 1.147.70.50:1668 Failed. SIP ALG Detected. Via header
6 SIP INVITE UDP 5060 6060 0 1.147.70.50:1668 Pass
7 SIP INVITE UDP 6060 5060 0 1.147.70.50:1708 Failed. SIP ALG Detected. Via header
8 SIP INVITE UDP 6060 6060 0 1.147.70.50:1708 Pass
9 SIP KEEPALIVE UDP 5060 5060 3 Failed. No response
10 SIP KEEPALIVE UDP 5060 6060 0 Pass
11 SIP KEEPALIVE UDP 6060 5060 3 Failed. No response
12 SIP KEEPALIVE UDP 6060 6060 0 Pass
13 SIP VOIPTEST UDP 5678 6050 0 Pass
14 RTP UDP 50000 30000 0 Pass
15 RTP UDP 30000 30000 0 Pass
16 RTP UDP 30001 30001 0 Pass
17 RTP UDP 30002 30002 0 Pass
18 SIP TLS 0 5061 1 Pass
19 SIP TLS 0 6061 0 Pass

3

Hello,

Are you experiencing any issues with the VoIP services, or is the issue present only with the checker?
Some of these utilities are known to provide false-positives and the actual communication should be tested with VoIP devices.
If there is an issue, make sure you update to the latest firmware, then navigate to Network → WAN → edit the mob1s1a1 interface and in the Advanced settings, change the Override MTU option to 1420, then if needed, to 1350.
Let me know how it goes.

Best regards,