FreeBSD dnstop: Monitor and Display DNS Server Traffic On Your Network
Q. How do I monitor my BIND dns server traffic om my network under FreeBSD operating systems?
A. You can displays various tables of DNS traffic on your network using dnstop. dnstop is a small tool to listen on device or to parse the file savefile and collect and print statistics on the local network's DNS traffic. You must have read access to /dev/bpf*.
Install dnstop under FreeBSD
Type the following commands
# portsnap fetch update
# cd /usr/ports/dns/dnstop/
# make install clean
How do I monitor DNS server stats in real time?
Simply type the dnstop as follows:
# dnstop {interface-name}
# dnstop em0
# dnstop fxp0
(Fig.01: dnstop in action)
To exit the program press ^X (CTRL + X). To reset the counters hit CTRL+R. You can try following keys to view diffrent data while running dnstop:
- s : display the source address table
- d : display the destination address table
- t : display the breakdown of query types seen
- o : display the breakdown of opcodes seen
For further information read dnstop man page:
$ man dnstop
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Tags: Bind dns, bind dns server, caching dns server, caching software, dns configuration, dnstop, freebsd monitor tool, monitor bind named server, monitor dns server, network monitor, tace dns server usage
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