I’m using FreePBX 15.0.17.24
Installed with newest December 2020 FreePBX ISO (STABLE SNG7-PBX-64bit-2011-5)
I’m using chan_sip trunk with Telnyx voip carrier, using TLS.
They sent me an email stating that they are deprecating TLS 1.0 and TLS 1.1 and that I need to switch to TLS 1.2 as they can see the connection is currently using either 1.0 or 1.1
What exactly do I need to change in FreePBX to make the connection use TLS 1.2 instead of 1.0/1.1?
I realize that link is about server connections, not client. But presumably if it can use TLS 1.3 as server, it can do the same as client.
BTW this is what I get when connecting to one of my PBXs with openssl. Strictly chan_sip, running Asterisk 16.6:
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Server public key is 4096 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 21 (unable to verify the first certificate)