No networking in department during G20 times

In order to lessen the risk to the departmental systems, the local departmental networking on the sixth floor of Bahen will be disabled starting at 3pm on Wednesday June 23 and will be restored on Monday June 28 (we expect that connectivity will be restored by the normal start of that day).  This means that, for example, office machines and the machines in BA6200 will not be networked.  The departmental servers (coxeter, mail, www, wiki, and blog) should all remain accessible from outside Bahen, if there are no problems.