Hi. Me again butting in, because I am confused again.
When users workstations within a company's local network have browsers configured to use an internal "http proxy" in order to access Internet HTTP servers, is this internal proxy system a "forward" or a "reverse" proxy ?
I am not talking here about a generic IP Internet router doing NAT, I am talking specifically about a "web proxy".  This HTTP proxy may also do NAT of course, but its main function I believe is to cache pages from external servers for the benefit of internal workstations, no ?
If this is a forward proxy, then I do not understand the comment of Solprovider that seems to indicate that such things are obsolete and/or dangerous.  At any rate, they are in use in most corporate networks I am aware of.

André