What are these DNS files for?

What are these DNS files for?

Post by nospa » Sat, 22 Feb 2003 12:05:07



I'm using bind 9.2.1, and have found hundreds of files with
different extensions in /var/named which look like:

sim:/var/named> ls -l *.a*|head
-rw-r--r--   1 root       sys              0 Feb 11 05:59  db.12.9.71.128.a00100
-rw-r--r--   1 root       sys              0 Feb 13 19:54  db.12.9.71.128.a00110
-rw-r--r--   1 root       sys              0 Jan  3 05:21   db.12.9.71.128.a00111
-rw-r--r--   1 root       sys              0 Dec 31 17:57  db.12.9.71.128.a00112

Why are these files being created?  What are they for?

-Thanks

 
 
 

What are these DNS files for?

Post by bard » Sat, 22 Feb 2003 13:19:01



> I'm using bind 9.2.1, and have found hundreds of files with
> different extensions in /var/named which look like:

> sim:/var/named> ls -l *.a*|head
> -rw-r--r--   1 root       sys              0 Feb 11 05:59  db.12.9.71.128.a00100
> -rw-r--r--   1 root       sys              0 Feb 13 19:54  db.12.9.71.128.a00110
> -rw-r--r--   1 root       sys              0 Jan  3 05:21   db.12.9.71.128.a00111
> -rw-r--r--   1 root       sys              0 Dec 31 17:57  db.12.9.71.128.a00112

> Why are these files being created?  What are they for?

> -Thanks

They look like reverse zone files, even although they are empty, do you
receive zone transfers from another server ? If so they may be temporary
files for the zone transfer process.

Bards.

 
 
 

What are these DNS files for?

Post by Ian Northeas » Sun, 23 Feb 2003 05:21:01



> I'm using bind 9.2.1, and have found hundreds of files with
> different extensions in /var/named which look like:

> sim:/var/named> ls -l *.a*|head
> -rw-r--r--   1 root       sys              0 Feb 11 05:59  db.12.9.71.128.a00100
> -rw-r--r--   1 root       sys              0 Feb 13 19:54  db.12.9.71.128.a00110
> -rw-r--r--   1 root       sys              0 Jan  3 05:21   db.12.9.71.128.a00111
> -rw-r--r--   1 root       sys              0 Dec 31 17:57  db.12.9.71.128.a00112

> Why are these files being created?  What are they for?

They look like the temporary files which are created on a slave while a
zone transfer is in progress. If you are getting lots of them left
around then zone transfers are failing. Are they all for the same zone
(all your examples are)? If so then there is possibly something wrong
with that zone. If not then there is probably something wrong with the
network.

Old ones can safely be deleted.

Regards, Ian

 
 
 

1. What am I missing in setting up caching DNS server?

Hi,

I am currently trying to set up a caching-only DNS server. When I
use nslookup on the server, everything seems to work great, but
when I change the resolv.conf on some of my other machines to
point to the new server, and then do a nslookup, I get the
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nslookup xxxxxx
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where X.X.X.X is the ip address of the new server. It does go to
the next server in resolv.conf and get the info, but I don't
understand what this error means.

Thanks for the help.

Marc

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