DNS stops

[Boulton, Michael (Corp-Warren)]

  Greetings,

  We have been having a problem with our DNS' for a little while. We have an
outside DNS on a
DMZ for outside resolving, and an inside one, yes for inside resolving. The
problem seems to
occur almost weekly, where neither one can resolve. Nslookup will not
operate, and it ends up
that we have to reboot them. We are running BIND 8.2.3 on a Linux Redhat.

 Does anyone have any input, or similar problem?

Mike