![]() You may need to run it with elevated rights depending on your operating system. This can be useful if particular queries are not resolved correctly and you want proof for that.ĭNSQuerySniffer is a portable application that you can run right after you have downloaded and unpacked it on your system. And if you are a regular Internet user, you may use it to find out if your ISP is filtering DNS queries. Webmasters and server admins may use it to check DNS server propagation, which can be useful if a website is moved to a new server among other things. While you can do so in other ways as well, not all are as comfortable and easy than using this program. ![]() You can use it for instance to find out which connections your PC makes. Or if you'd rather not install anything else, choose the "Raw Sockets" option and you may still get reasonable results (the documentation provided with DNSQuerySniffer explains more).Īny queries intercepted are displayed in full, with all the details you'd expect: Host Name, Port Number, Query ID, Request Type, Request Time, Response Time, Duration, Response Code, Records Count, and the returned records.Īnd as usual with NirSoft tools, everything is displayed in a sortable table, and your data can be exported as TXT, CSV, HTML and more.Why would something like this be useful? There are a couple of purposes why you may find a listing of all DNS queries your PC makes useful. The data capture itself can be done via WinPcap and Microsoft Network Monitor. Malware will often use DNS traffic to communicate with its operators, for instance, so taking a closer look at your own system might help to uncover an infection (look for odd or unusual domains, say, or a lot of failed lookups).Īnd more generally, DNSQuerySniffer helps to reveal which of your applications is trying to go online, and maybe what they're trying to do. ![]() DNSQuerySniffer is a tiny network sniffer which detects and displays DNS queries as they're sent on your system. ![]()
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