Update PTR records

[Jonathan McLoughlin]

I am trying to use dnspython to update a timestamp on a number of PTR records.

An existing script that uses the system nsupdate looks something like this:

server <IP of DNS server>

update add 10.1.1.10.in-addr.arpa. 3600 PTR server1.example.com.

update add 10.1.16.172.in-addr.arpa. 3600 PTR server2.example.com.

send 

update

However from documentation and testing, I believe I need the PTR zone name to use dnspython for this purpose i.e.

record = dns.update.Update(zone='16.172.in-addr.arpa')

record.replace('10.1.16.172.in-addr.arpa.','3600','PTR','server2.example.com.')

dns.query.tcp(record, '<IP of DNS server>')

Is there any option to use dnspython to update PTR records without providing the PTR zone name similar to the nsupdate tool?

[Bob Halley]

dnspython provides the dns.resolver.zone_for_name() function to find the zone for a given name.

import dns.resolver

record = dns.update.Update(zone=dns.resolver.zone_for_name('10.1.16.172.in-addr.arpa.'))

# the rest of your update here, same as before

You might also find the dns.reversename module helpful.

>>> import dns.reversename

>>> print(dns.reversename.from_address('172.16.1.10'))

10.1.16.172.in-addr.arpa.

[Jonathan McLoughlin]

Thank you!

Works perfectly