488 Not Acceptable Here in Incoming calls with SRTP

[ainamestre (Aina)]

Hi,

I got the error 488 Not Acceptable Here when i am trying incomping calls from a freeswitch and using SRTP, when i make outgoing calls they work correctly.

I send the invite to the FreePBX correctly with the m=audio RTP/SAVP.
I have configured in the extensión (chan sip) SRTP, in the trunk (chan sip) encryption=yes, in the advanced settings of settings, SRTP .
I don’t really know why is it failing, and i’m not able to see the debug because even with verbose nothing is show.
I have also set AVP to yes to force the SAVP

I don’t want to use TLS, only SRTP

INVITE:
v=0
│ │ │o=FreeSWITCH 1655269491 1655269492 IN IP4 XX.XX.XX.XX
│ │ │s=FreeSWITCH
│ │ │c=IN IP4 109.167.76.244
│ │ │t=0 0
│ │ │m=audio 30338 RTP/SAVP 8 0 101 13
│ │ │a=rtpmap:8 PCMA/8000
│ │ │a=rtpmap:0 PCMU/8000
│ │ │a=rtpmap:101 telephone-event/8000
│ │ │a=fmtp:101 0-15
│ │ │a=rtpmap:13 CN/8000
│ │ │a=crypto:7 AES_CM_128_HMAC_SHA1_80 inline:frm9FHV/cTepRS0MWyG4DC//+BLzcaHOtoCKLEab
│ │ │a=ptime:20

[wifx]

Use PJSIP as said allready

In the extension, check that you have Selected AUTO in the transport.
This will accept UDP/TCP/TLS.

Check also that you are using the right port, port can be different if you are using chan_SIP or PJISP.

I use FreePBX 15 with TLS/SRTP and IPv6 and it work fine.