[ale] Next proxy question

[Christopher Fowler]

My proxy server is 192.168.3.1:8181 and will only proxy to machines
across a wan via dial-up and vtun.  I need from IE somehow use that
proxy on a temp basis without having to go into proxy setup each time a
user needs access to those machines.

One idea was to try this:

http://192.168.3.1:8181/10.0.5.176/

That does not even look right.  Is there any way to use a proxy server
on demand or should I create a proxy server that will support that
feature.  Maybe the browser will choke?