Hello, I would like to use a commercial certificate to generate client certificates for my TLS sip clients. I have received the following files for my server from PositiveSSL Root CA Certificate - AddTrustExternalCARoot.crt Intermediate CA Certificate - COMODORSAAddTrustCA.crt Intermediate CA Certificate - COMODORSADomainValidationSecureServerCA.crt Your PositiveSSL Certificate - myserver_dyndns_org.crt I did the following to create the files in freeswitch/conf/ssl a) cat myserver.key myserver_dyndns_org.crt>agent.pem b) cat COMODORSADomainValidationSecureServerCA.crt COMODORSAAddTrustCA.crt AddTrustExternalCARoot.crt > cafile.pem Testing the server works: openssl s_client -showcerts -connect myserver.dyndns.org:5061 *****SNIP**** Server certificate subject=/OU=Domain Control Validated/OU=PositiveSSL/CN=myserver.dyndns.org issuer=/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO RSA Domain Validation Secure Server CA --- No client certificate CA names sent --- SSL handshake has read 6108 bytes and written 442 bytes --- New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-SHA Server public key is 2048 bit Secure Renegotiation IS supported *****SNIP****** How do i create the certificates for the clients now? Thanks Rajil