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     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/dnstop/description.txt	Thu May 19 19:43:34 2022 +0000
     1.3 @@ -0,0 +1,26 @@
     1.4 +Dnstop is a libpcap application (like tcpdump) that displays
     1.5 +various tables of DNS traffic on your network.
     1.6 +Currently dnstop displays tables of:
     1.7 +
     1.8 +* Source IP addresses
     1.9 +* Destination IP addresses
    1.10 +* Query types
    1.11 +* Response codes
    1.12 +* Opcodes
    1.13 +* Top level domains
    1.14 +* Second level domains
    1.15 +* Third level domains
    1.16 +
    1.17 +Dnstop supports both IPv4 and IPv6 addresses.
    1.18 +
    1.19 +To help find especially undesirable DNS queries, dnstop provides
    1.20 +a number of filters. The filters tell dnstop to display only the
    1.21 +following types of queries:
    1.22 +
    1.23 +* For unknown or invalid TLDs
    1.24 +* A queries where the query name is already an IP address
    1.25 +* PTR queries for RFC1918 address space
    1.26 +* Responses with code REFUSED 
    1.27 +
    1.28 +Dnstop can either read packets from the live capture device,
    1.29 +or from a tcpdump savefile.