Collect record information in Linux DNS

sandeep_hello · 02-22-2012, 04:26 AM

Suppose i have created a record in DNS i.e. station1.example.com and creates 5 CNAME record which is associated with this record.

So if i want to take information about station1.example.com then it should give all details which is associated with this name like CNAME.

So what command i can use to see the information.

Regards
Sandeep Sharma

lithos · 02-22-2012, 05:26 AM

Hi,

I don't think you can do that,
but take a look at some DIG example to try out different options.

eosbuddy · 02-22-2012, 05:39 AM

dig @<name-server> CNAME station1.example.com

(substitute the name-server domain name)

zhjim · 02-22-2012, 06:26 AM

Code:

dig any station1.example.com

sandeep_hello · 02-22-2012, 06:28 AM

Both dig commands are not giving required output.

sandeep_hello · 02-22-2012, 06:54 AM

Only option that i am seeing here is that through DNS config, we can collect detail of records by using utility like grep.

eosbuddy · 02-22-2012, 07:09 AM

You will surely need to process the output with awk and grep.

e.g:

Code:

dig @<nameserver> CNAME station1.example.com |grep "station1.example.com. .*[0-9]" |awk '{ print $5}'

bathory · 02-22-2012, 12:36 PM

Hi,

Quote:

Originally Posted by sandeep_hello

Only option that i am seeing here is that through DNS config, we can collect detail of records by using utility like grep.

Another way is to run the following from a host that is allowed to do AXFRs:

Code:

dig axfr example.com |grep station1.example.com

Regards

sandeep_hello · 02-22-2012, 11:39 PM

This command is also useful but mentioned command can be run on slave DNS server only if i am not wrong.

bathory · 02-23-2012, 12:25 AM

Quote:

Originally Posted by sandeep_hello

This command is also useful but mentioned command can be run on slave DNS server only if i am not wrong.

Not necessarily. As I've said above it can be run from a host that is allowed to do zone transfers. Usually this is indeed another dns (primary or secondary) authoritative for that zone, but you can allow-transfer for whatever host you want.

Regards