There are bots that use SSL for C&C communication over port 443. There's also obligations under certain banking regulations to be able to intercept all communic

There are bots that use SSL for C&C communication over port 443. There's also obligations under certain banking regulations to be able to intercept all communications (e.g. on the dealing floor) and whilst some Internet access may be useful, opening things up too far can cause more problems than it solves.