Greetings, I use TLS transport for all my endpoints on my production system (Asterisk 11) . I need to debug some NAT traversal issues, and would like to use the ?sngrep? tool which shows SIP messages from a packet capture. Per the developer of ?sngrep? : "Right now, sngrep only supports TLS_RSA_WITH_AES_128_CBC_SHA and TLS_RSA_WITH_AES_256_CBC_SHA? I have not specified a cipher for my sip.conf TLS transport and I do not know how to see which one is being used . The list of ciphers I see available to me, at least based on running ?openssl ciphers? command on my Asterisk box, are listed below. None of them exactly matches the strings above listed as supported ciphers for sngrep. Can I configure Asterisk to use one of the ciphers supported by sngrep? Is there a better tool than sngrep for viewing TLS SIP captures? Are the sngrep supported ciphers safe? Thank you, Kevin Long output from ?openssl ciphers? on my Asterisk box: ECDHE-RSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-RSA-AES256-SHA384 ECDHE-ECDSA-AES256-SHA384 ECDHE-RSA-AES256-SHA ECDHE-ECDSA-AES256-SHA DHE-DSS-AES256-GCM-SHA384 DHE-RSA-AES256-GCM-SHA384 DHE-RSA-AES256-SHA256 DHE-DSS-AES256-SHA256 DHE-RSA-AES256-SHA DHE-DSS-AES256-SHA DHE-RSA-CAMELLIA256-SHA DHE-DSS-CAMELLIA256-SHA ECDH-RSA-AES256-GCM-SHA384 ECDH-ECDSA-AES256-GCM-SHA384 ECDH-RSA-AES256-SHA384 ECDH-ECDSA-AES256-SHA384 ECDH-RSA-AES256-SHA ECDH-ECDSA-AES256-SHA AES256-GCM-SHA384 AES256-SHA256 AES256-SHA CAMELLIA256-SHA PSK-AES256-CBC-SHA ECDHE-RSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-RSA-AES128-SHA256 ECDHE-ECDSA-AES128-SHA256 ECDHE-RSA-AES128-SHA ECDHE-ECDSA-AES128-SHA DHE-DSS-AES128-GCM-SHA256 DHE-RSA-AES128-GCM-SHA256 DHE-RSA-AES128-SHA256 DHE-DSS-AES128-SHA256 DHE-RSA-AES128-SHA DHE-DSS-AES128-SHA ECDHE-RSA-DES-CBC3-SHA ECDHE-ECDSA-DES-CBC3-SHA DHE-RSA-SEED-SHA DHE-DSS-SEED-SHA DHE-RSA-CAMELLIA128-SHA DHE-DSS-CAMELLIA128-SHA EDH-RSA-DES-CBC3-SHA EDH-DSS-DES-CBC3-SHA ECDH-RSA-AES128-GCM-SHA256 ECDH-ECDSA-AES128-GCM-SHA256 ECDH-RSA-AES128-SHA256 ECDH-ECDSA-AES128-SHA256 ECDH-RSA-AES128-SHA ECDH-ECDSA-AES128-SHA ECDH-RSA-DES-CBC3-SHA ECDH-ECDSA-DES-CBC3-SHA AES128-GCM-SHA256 AES128-SHA256 AES128-SHA SEED-SHA CAMELLIA128-SHA DES-CBC3-SHA IDEA-CBC-SHA PSK-AES128-CBC-SHA PSK-3DES-EDE-CBC-SHA KRB5-IDEA-CBC-SHA KRB5-DES-CBC3-SHA KRB5-IDEA-CBC-MD5 KRB5-DES-CBC3-MD5 ECDHE-RSA-RC4-SHA ECDHE-ECDSA-RC4-SHA ECDH-RSA-RC4-SHA ECDH-ECDSA-RC4-SHA RC4-SHA RC4-MD5 PSK-RC4-SHA KRB5-RC4-SHA KRB5-RC4-MD5