Earlier today we ran into a problem after we installed new certificates
issued by Comodo High Assurance on our servers. The problem was with
Firefox, where it was displaying "The certificate is not trusted because
the issuer certificate is unknown.(Error code:
sec_error_unknown_issuer)". Other browsers, including IE and Chrome did
not have problems.
Searching the web, the solution was to install the intermediate/chain
certificate on our web server. What we couldn't figure out was why it
didn't happen to other browsers (apparently they already had those certs
pre-installed, where Firefox didn't), and more importantly, how to
install them on our web servers.
After playing around with different pound options, we found that we
needed to have the Comodo CA cert added to the "Cert" file. The Comodo
CA certificate also had to be at the end (after the private key and our
cert).
Granted I know very little about SSL, but wanted to put this out there,
in case somebody runs into a problem with CA certificates which are not
preinstalled on the browser.
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