DNSQuerySniffer shows all the DNS traffic on your system
NirSoft has announced the public availability of DNSQuerySniffer, a tiny (130KB, including a Help file) network sniffer which detects and displays your DNS traffic.
If you think this sounds just a little technical, then you’re right, but the program does have some interesting applications. Malware will often use DNS traffic to communicate with its operators, for instance, and so taking a closer look at your own system may reveal the signs of an infection (a large number of failed lookups to domains you don’t recognize, say).
And more generally, DNSQuerySniffer helps to reveal which of your applications is trying to go online, and maybe what they’re trying to do. The data capture itself can be done via WinPcap and Microsoft Network Monitor. But if you’d rather not install anything else, the program also supports Raw Sockets capture, and this may produce acceptable results (the documentation provided with DNSQuerySniffer explains more).
