Gentoo Linux

  1. Copy downloaded ca.crt file to /etc/ssl/certs/starcom_ca.crt file.
  2. Run command:

    update-ca-certificates

All done. To test it run following command:

openssl s_client -connect tigase.org:5223 -CApath /etc/ssl/certs

Scroll the output up and look for something like:

verify return:1

Which means certificate verification was successful. If you find however:

verify return:0

Look one line up for an error message which may look like this:

verify error:num=19:self signed certificate in certificate chain

Which means the root certificate is still not recognized in your system.