Dear all, Thank you very much for your time. All, I read from tls.html (www.openser.org) that for making good certificate, we must add rootCA to calist file by using: cat add_cacert.pem >> calist.pem 1.When I try to run it, I got error message. It can not execute? Why? It says :"There is no command add_cacert.pem" Does that command just make new file named "calist.pem"? (There is no difference between cacert.pem) 2. I compile TLS with openssl.0.9.7a. The openssl-0.9.7.a packet, I got when installing Redhat. But, How can I know that TLS that I have build using openssl or ssl (for security) version? or How can we run openssl or ssl? I do hope anybody can help me. Please..Thank you very much. Regards, Ferianto --------------------------------- Stay in the know. Pulse on the new Yahoo.com. Check it out.