I did not find anything on how to block non-standard HTTP traffic (e.g. a tunneled or proprietary protocol) requested over the standard HTTP proxy.
Or is it blocked by default ?
Thanks and regards
Got a reponse directly from McAfee - Solution:
Create a rule which checks the "URL.Protocol". If it is NOT "http" or "https" block the traffic.
Cool thread, as I posted about this earlier and wondered how this would be handled within Web Gateway. My experience is that these proprietary applications break if they use standard 80/443 but there is never indication, or at least I could never find anything. Might be interesting to write the results of that rule to a specific log so you can see who is trying to tunnel stuff out.