if you enable this feature, every HTTP CONNECT request through the http proxy gets blocked. Therefore it is no longer possible to use any application through the HTTP proxy, only HTTP GET and POST requests will be send through.
if you enable this feature, every HTTP CONNECT request through the http proxy gets blocked. Therefore it is no longer possible to use any application through the HTTP proxy, only HTTP GET and POST requests will be send through.
just wanna add that it depends if the IM clients use the connect method or not. But AFAIK the Most of them do that.
we only block connect calls on HTTP port 80, as HTTPS as and certain other protocols need the connect method in order to work properly. But if you want to block them, just remove them of the allowed services.