DNS/Firewall issue

  • Thread starter Thread starter Jaz
  • Start date Start date
J

Jaz

We use Microsoft's ISA server for our firewall. When ever I restart the
firewall and web proxy service, my DNS server is unable to resolve any DNS
lookups. I have to restart the DNS service on my DNS server for it to work.
Does anybody know why this happens? It's a problem because if I forget to
restart the DNS service, our email server can not send out email because it
cannot resolve the domain names. What is the link between the firewall and
DNS?

Thanks,
Jasper
 
Jaz said:
We use Microsoft's ISA server for our firewall. When ever I restart the
firewall and web proxy service, my DNS server is unable to resolve any DNS
lookups. I have to restart the DNS service on my DNS server for it to work.
Does anybody know why this happens? It's a problem because if I forget to
restart the DNS service, our email server can not send out email because it
cannot resolve the domain names. What is the link between the firewall and
DNS?
Click to expand...

Having to restart the internal DNS service on an internal
DNS sounds odd -- sometimes we have trouble with ISA
itself but not the "clients of ISA".

I usually (frequently) run a Caching only DNS server on the ISA box.

Since the ISA box is a "domain machine" I actually point it's client
NIC DNS at the internal servers (overriding anything the ISP gives
me from DHCP or manual on the external NIC.)

All internal DNS clients must point strictly to internal DNS.
 
Back
Top