@Sven Groot: I see nothing (although it is already blocked by my firewall) so I won't worry too much

@evildictaitor: ATM I'm connected to a large university hall of residence network so it's always a good idea to be suspicious. You can't trust who or what you're connecting to - a while back they had a problem with malware on connected computers pretending to be the DHCP server and infecting unpatched machines. Similarly when I connect to the main university network (since I'm not normally in halls).

Anyway I think I'm safe atm. Thanks guys!