Is my BIND Server's Cache Poisioned ?

Barry Margolin barmar at
Thu Jun 30 03:47:08 UTC 2005

In article <d9vige$jp6$1 at>, Joe Shen <joe_hznm at> 

> Hi,
> I met a strange problem with my cache server, which
> runs BIND9.3.1.
> In past days, our customers complaint that three
> domain names (,
> could not be resolved frequently. I checked on the
> cache server and found, when the cache server could
> not resolve ( I
> can solve the problem by running "rndc flush". 
> The debugging output of named process has the
> following output when it could not resolve
> Do that mean my cache server is poisioned for these
> two domain name? 

The authoritative servers for the domain do not have A 
records for the nameserver hostnames.

The NS records for are aliases rather than primary 
hostnames.  This can cause problems like this.

Barry Margolin, barmar at
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

More information about the bind-users mailing list