RE: Running public DNS server on iSeries

We have been using a 170 for a secondary DNS server in our backup site.  Yes
it is hit occasionally and works.  It is NAT'd behind the firewall with a
public IP translated to a private IP.  You need to open up both UDP and TCP
port 53.

Chris Bipes
Information Services Director
CrossCheck, Inc.


-----Original Message-----
Neil Palmer/DPS wrote:

>I think the following is possible, though maybe not advisable.  Any 
>comments?
>
>Have a customer switching ISP's from one who was providing DNS service to 
>one who won't (because the latter has DSL and the former is only ISDN).
>They only have one system, the iSeries, behind a firewall.  I was 
>wondering about running a DNS server on the iSeries for their public 
>domain, and seting the firewall to forward DNS port 53 traffic to the 
>internal address of their iSeries.  Is this possible?  (May be an issue 
>there too in that the internal DNS address for their domain should resolve 
>to a 192.168.x.x address, so maybe that's a showstopper right there).  I'm 
>thinking I'd be better off signing them up with one of the free DNS 
>service providers.
>
>
>Also, DNS on port 53 uses only TCP. not UDP - is that right?
>