I am using Asterisk 22.214.171.124 with Yealink T28P VoIP phones (latest v61 firmware)
I followed the instructions here:
wiki.asterisk.org/wiki/display/ … g+Tutorial
to enable TLS.
My sip.conf looks like this:
tlsenable = yes
tlscertfile = /etc/asterisk/certs/asterisk.pem
tlscadir = /etc/asterisk/certs/ca
tlscipher = ALL
tlsclientmethod = tlsv1
I have run “c_rehash” on the CA certs directory.
When the Yealink phones are set to TLS mode I get:
“handle_tcptls_connection: FILE * open failed” on the Asterisk CLI every minute or so.
I do not get this error when only using TLS to my upline provider.
I have spent a lot of time trying to work this out with Google and have had no success so far.