[Zope] SSL

What is the best method for implementing SSL for Zope on RedHat 7.1? I've tried the Apache front-end thing and it works for our local network but the web server is behind a firewall and something about portforwarding keeps it from working through the firewall. Isn't there some product that you can simply install into Zope that gives you SSL capability? I looked into MCrypto but it wouldn't compile correctly on this box. TIA Rick