Hi,
we have an own physical subnet for guests, which are allowed to surf the web and check their emails.
As all our inhouse users have to use the proxy with authentication to surf the web, it would make things much easier, when one could switch the http-proxy to transparent for the guest-network and to standard with authentication for the inhouse network.
PS. to enforce the company regulations, not to surf to some sites, it is not possible to bypass the content filter by opening port 80 for that subnet.