supported Caching Proxy server

Hi !

I need to confirm supported caching proxy server.

According to the article about system requirements, following products are supported by CLM 2012.
HTTP Reverse Proxy Support
    Apache Server 2.2.19 on RHEL and SLES [Non-secure Only (no HTTPS)]
    IBM HTTP Server 8.0
    IBM HTTP Server 7.0 Fixpack 18
    Websphere Application Server Network Deployment v8.0.0.3
    WebSphere Application Server Network Deployment v7.0 Fixpack 23
    Squid 3.0 for caching

• Are all of above products supported as a content caching proxy server for Jazz Source Control?

( Apache, IHS, WAS ND and Squid are supported as a caching proxy server? )

• If they are supported, how about WebSphere Edge server?

Thank you for your all co-operations!