[lug] DNS resolution woes

[John Hernandez]

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Despite what DNS admin says, I believe there is an error in the zone
file:  garbage characters, possibly incorrect formatting.  Ahh, I'm
guessing he reversed the (type) "MX" and the (priority) "20" fields in
the record.

The record should look like:

@ IN MX 20 server.mydomain.com.

If you can't get him to fix it, it should be possible to force Qmail to
deliver mail for a particular domain to a hardcoded IP address (ignoring
DNS).  Akin to the mailertable in sendmail.  Anyone know how?

- -John

Jeff Schroeder wrote:
| ... So I have a Linux box (Red Hat 7.2) sitting in the midst of a
| corporate Windows environment.  The Linux box is tasked with sending
| mail (using Qmail) to the Windows mail server, for delivery to users in
| the company.  Everything is being done behind a firewall, so all IP's
| resolve to 192. addresses.
|
| The problem is, the Windows DNS server being used by the Linux box is
| apparently messed up.  It isn't sending an MX record at all, so the
| mail can't go through (Qmail can't resolve the proper mail server).  I
| don't have control of the Windows machine, but the company sysadmin
| assures me he's set up the MX record appropriately.
|
| When I run 'dig', I see the following (domain name changed to protect
| the innocent).  Note the "BADTYPE" line, with "unknown RR type".  Does
| anyone know what this means?  Has anyone seen this problem when using
| Windows DNS from a Linux platform?
|
| TIA,
| Jeff
|
| ; <<>> DiG 8.3 <<>> mydomain.com any
| ;; res options: init recurs defnam dnsrch
| ;; got answer:
| ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2
| ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 2
| ;; QUERY SECTION:
| ;;      mydomain.com, type = ANY, class = IN
|
| ;; ANSWER SECTION:
| mydomain.com.          10M IN A        192.168.1.3
| mydomain.com.          10M IN A        192.168.1.2
| mydomain.com.          1H IN NS        host1.mydomain.com.
| mydomain.com.          1H IN NS        host2.mydomain.com.
| mydomain.com.          1H IN SOA       host1.mydomain.com. admin. (
|                                        1793            ; serial
|                                        15M             ; refresh
|                                        10M             ; retry
|                                        1D              ; expiry
|                                        1H )            ; minimum
|
| mydomain.com.          0S IN BADTYPE   \# 20 ( ; unknown RR type
|         00 01 00 00 00 00 00 02 00 00 03 84 00 00 00 01 ;
| ................
|         c0 a8 01 02 )                                   ; ....
|
| ;; ADDITIONAL SECTION:
| host1.mydomain.com.  1H IN A         192.168.1.3
| host2.mydomain.com.  1H IN A  192.168.1.2
|
| ;; Total query time: 1 msec
| ;; FROM: localhost to SERVER: default -- 192.168.1.3
| ;; WHEN: Fri Aug 30 02:20:04 2002
| ;; MSG SIZE  sent: 31  rcvd: 214
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- --

~  - John Hernandez - Network Engineer - 303-497-6392 -
~ |  National Oceanic and Atmospheric Administration   |
~ |  Mailstop R/OM62. 325 Broadway, Boulder, CO 80305  |
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