DNS Server on xDSL

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Guest

Really hope someone can help here.

I have a SDSL service with a static IP address. The service has a single IP
address and we use port forwarding at the firewall to route traffic to the
appropriate Win2K servers.

Our business requires that we be able to test web and email services and for
this we need to maintain our own DNS server. I have established a DNS server
on a Win2K box in the DMZ on a private address subnet and forwarded UDP and
TCP ports 53 to the server. The external IP address has been registered as a
DNS
service. I have set up a couple of test domains and created host entries and
correctly delegated the domains to our external IP address. If I ping these
hosts from the Internet, the returned address correctly identifies our
external IP address. Web servers on the private network are correctly
accessible by name from the Internet (port 80 is also forwarded). This
implies that the server is correctly responding.

My problem is this. Email doesn't work (port 25 is forwarded). I have
created mail.domainname.com zones and corresponding MX records. The mail
host is pingable from the 'net. Email sent to any address returns the
following error:

----- The following addresses had permanent fatal errors -----
<[email protected]>

----- Transcript of session follows -----

550 5.1.2 <[email protected]>... Host unknown (Name server:
nameserver.com: no data known)

At this point I am stumped. I know I've missed something or misunderstood
something but I can't figure it. Maybe I can't do what I want on a DSL line.
I thought it might be something to do with reverse lookup, the problem here
being that the ISP's address for the IP address is returned. However, I'm
not sure that that matters as there are plenty of mail servers running
multiple domains which don't return the correct domain name in a reverse
lookup.

One thing that might help is that if I do a "dig" against the server, the MX
record appears in "addisitonal records" rather than "answers" - as I've
noticed on onther DNS server. If this is an issue, how do I fix it?

Help ... what am I doing wrong. This is important.



Thanks

Craig
 
In
CraigC said:
Really hope someone can help here.

I have a SDSL service with a static IP address. The
service has a single IP address and we use port
forwarding at the firewall to route traffic to the
appropriate Win2K servers.

Our business requires that we be able to test web and
email services and for this we need to maintain our own
DNS server. I have established a DNS server on a Win2K
box in the DMZ on a private address subnet and forwarded
UDP and TCP ports 53 to the server. The external IP
address has been registered as a DNS
service. I have set up a couple of test domains and
created host entries and correctly delegated the domains
to our external IP address. If I ping these hosts from
the Internet, the returned address correctly identifies
our external IP address. Web servers on the private
network are correctly accessible by name from the
Internet (port 80 is also forwarded). This implies that
the server is correctly responding.

My problem is this. Email doesn't work (port 25 is
forwarded). I have created mail.domainname.com zones and
corresponding MX records. The mail host is pingable from
the 'net. Email sent to any address returns the following
error:

----- The following addresses had permanent fatal errors
----- <[email protected]>

----- Transcript of session follows -----

550 5.1.2 <[email protected]>... Host unknown (Name
server: nameserver.com: no data known)

At this point I am stumped. I know I've missed something
or misunderstood something but I can't figure it. Maybe I
can't do what I want on a DSL line. I thought it might be
something to do with reverse lookup, the problem here
being that the ISP's address for the IP address is
returned. However, I'm not sure that that matters as
there are plenty of mail servers running multiple domains
which don't return the correct domain name in a reverse
lookup.

One thing that might help is that if I do a "dig" against
the server, the MX record appears in "addisitonal
records" rather than "answers" - as I've noticed on
onther DNS server. If this is an issue, how do I fix it?

Help ... what am I doing wrong. This is important.
Click to expand...

On the face of it it sounds like it should work, without an actual domain
name you have set up there is no way to test this.

If you query your DNS server for the MX record for one of the domains, it
should return something like this with routable public Ip addresses.
QUESTION SECTION:
wftx.us. IN MX

ANSWER SECTION:
wftx.us. 172800 IN MX 10 mail.lsaol.com.
wftx.us. 3600 IN MX 30 mail.wftx.us.
wftx.us. 172800 IN MX 20 mail.lonestaramerica.com.

ADDITIONAL SECTION:
mail.lsaol.com. 172800 IN A 65.65.91.211
mail.wftx.us. 172800 IN A 65.65.91.213
mail.lonestaramerica.com. 172800 IN A 65.65.91.212
 
Thanks Kevin .. you didn't give me the exact answer but you pointed me in the
right direction.
 
In
CraigC said:
Thanks Kevin .. you didn't give me the exact answer but
you pointed me in the right direction.
Click to expand...

I couldn't give you an exact answer without an the exact domain name, all I
could do is post a query for correctly set up MX records as an example to
follow.
 
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