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12.1 > Network > dnstop (20080502)

dnstop is a libpcap application (ala tcpdump) that displays various tables of DNS traffic on your network. Currently dnstop displays tables of:

* Source IP addresses
* Destination IP addresses
* Query types
* Response codes
* Opcodes
* Top level domains
* Second level domains
* Third level domains
* etc...

dnstop supports both IPv4 and IPv6 addresses.

To help find especially undesirable DNS queries, dnstop provides a number of filters. The filters tell dnstop to display only the following types of queries:

* For unknown/invalid TLDs
* A queries where the query name is already an IP address
* PTR queries for RFC1918 address space

dnstop can either read packets from the live capture device, or from a tcpdump savefile.

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Unless modified, this script compiles with PPP frame support.

Homepage: http://dns.measurement-factory.com/tools/dnstop/

Approved by: Erik Hanson
Maintained by: Menno E. Duursma