On Tue, Aug 29, 2017 at 11:11 AM, Brian Kantor Brian@ucsd.edu wrote:
The way to tell if a particular nameserver is current is to examine the serial number in the ampr.org SOA record as retrieved from it and compare that with the SOA from ampr.org (44.0.0.1). I use the 'dig' tool for this purpose; there are other tools as well.
Brian,
Here is a script you might find useful for diagnostics.
$ cat nssoa.sh #!/bin/bash ZONE=${1:-ampr.org} for nameserver in $(dig +short ns $ZONE); do echo "$(dig +short soa @$nameserver $ZONE | cut -d' ' -f3)" "$nameserver" done
$ ./nssoa.sh | sort 1708281715 ns0.comgw.net. 1708282030 munnari.OZ.AU. 1708282030 ns1.defaultroute.net. 1708291000 ampr-dns.in-berlin.de. 1708291800 ampr.org. 1708291800 ns2.threshinc.com.
Tom KD7LXL