Synopsis: Proxy server process using incorrect IP intermittently when accessing other virtual servers.
State-Changed-From-To: open-closed State-Changed-By: marc State-Changed-When: Tue Jul 28 22:33:15 PDT 1998 State-Changed-Why: This is related completely to your OS; Apache does not specify any source address for the connections, but lets the OS pick the one it wants to. That is the correct thing for Apache to do. It is not unexpected that when connecting to another interface on the same machine the OS should pick that address as the source. There have been some issues with Solaris 2.6 and picking which address to use, and I think there is a ndd setting that can tune it, but I'm not sure what it is offhand. Maybe ip_enable_group_ifs, and there may be a patch or two related to it. 2.6 attempts to "load balance" traffic to interfaces on the same subnet by randomly picking a source address.
