reverse address resolution problems
David Botham
dns at botham.net
Thu Aug 8 17:03:38 UTC 2002
> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On
> Behalf Of Aidan Mark Humphreys
> Sent: Thursday, August 08, 2002 7:10 AM
> To: comp-protocols-dns-bind at isc.org
> Subject: reverse address resolution problems
>
>
> This has to be something dumb, but I can't see it.
>
> My first attempt to configure bind as a local name server - not
> much success. I'm using a real domain name but only on the
> internal LAN.
>
> FQNR works, but short names don't resolve and inverse resolution
> doesn't work. The syslog shows no errors on "ndc reload".
>
> What have I done wrong?
>
>
>
>
> Here are all the details ...
>
> # named -v
> named 8.3.2-T1B
>
> OS is FreeBSD 4.6
>
> Here is resolv.conf
> .........................................................
> domain xzy.de
Your problem with short resolution could be here. Your attempts to hide
the real domain could have erased the answer to your question. Try
posting the real info...
> nameserver 192.168.123.187
> --------------------------------------------------------
>
> Here is the Reverse Resolution Failiure:
> ---------------------------------------------------------
>
> # dig @192.168.123.187 192.168.123.187
This command should be:
# dig -x @192.168.123.187 192.168.123.187
The command you show is looking for an A record for 192.168.123.187,
which we know does not exist. The -x option tells dig to formulate an
in-addr.arpa query based on the ip address given on the cli. The
default query type for dig is "A"...
>
> ; <<>> DiG 8.3 <<>> @192.168.123.187 192.168.123.187
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1,
> ADDITIONAL: 0
> ;; QUERY SECTION:
> ;; 192.168.123.187, type = A, class = IN
>
> ;; AUTHORITY SECTION:
> .. 1h25m40s IN SOA A.ROOT-SERVERS.NET.
> NSTLD.VERISIGN-GRS.COM. (
> 2002080701 ; serial
> 30M ;
> refresh
> 15M ; retry
> 1W ; expiry
> 1D ) ;
> minimum
>
>
> ;; Total query time: 6 msec
> ;; FROM: bornheim.xzy.de to SERVER: 192.168.123.187
> 192.168.123.187
> ;; WHEN: Thu Aug 8 12:55:21 2002
> ;; MSG SIZE sent: 33 rcvd: 108
>
> ---------------------------------------------------------
>
> However FQN resolution works
>
> ---------------------------------------------------------
> # dig @192.168.123.187 bornheim.xzy.de
>
> ; <<>> DiG 8.3 <<>> @192.168.123.187 bornheim.xzy.de
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1,
> ADDITIONAL: 1
> ;; QUERY SECTION:
> ;; bornheim.xzy.de, type = A, class = IN
>
> ;; ANSWER SECTION:
> bornheim.xzy.de. 1H IN A 192.168.123.187
>
> ;; AUTHORITY SECTION:
> xzy.de. 1H IN NS bornheim.xzy.de.
>
> ;; ADDITIONAL SECTION:
> bornheim.xzy.de. 1H IN A 192.168.123.187
>
> ;; Total query time: 10 msec
> ;; FROM: bornheim.xzy.de to SERVER: 192.168.123.187
> 192.168.123.187
> ;; WHEN: Thu Aug 8 12:57:52 2002
> ;; MSG SIZE sent: 41 rcvd: 87
>
> ---------------------------------------------------------
>
> short name resolution failiure:
> ---------------------------------------------------------
> # dig @192.168.123.187 bornheim
>
> ; <<>> DiG 8.3 <<>> @192.168.123.187 bornheim
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1,
> ADDITIONAL: 0
> ;; QUERY SECTION:
> ;; bornheim, type = A, class = IN
>
> ;; AUTHORITY SECTION:
> .. 1h23m34s IN SOA A.ROOT-SERVERS.NET.
> NSTLD.VERISIGN-GRS.COM. (
> 2002080701 ; serial
> 30M ;
> refresh
> 15M ; retry
> 1W ; expiry
> 1D ) ;
> minimum
>
>
> ;; Total query time: 8 msec
> ;; FROM: bornheim.xzy.de to SERVER: 192.168.123.187
> 192.168.123.187
> ;; WHEN: Thu Aug 8 13:01:47 2002
> ;; MSG SIZE sent: 26 rcvd: 101
> ----------------------------------------------------------
>
>
>
> Here is named.conf
> --------------------------------------------------------
> options {
> directory "/etc/namedb";
> };
>
> zone "." {
> type hint;
> file "named.root";
> };
>
> // Local domains
> //
> zone "xzy.de" {
> type master;
> file "db.xzy.de";
> };
>
> zone "123.168.192.in-addr.arpa" {
> type master;
> file "db.192.168.123";
> };
>
> zone "0.0.127.IN-ADDR.ARPA" {
> type master;
> file "db.127.0.0";
> };
> -----------------------------------------------------
>
> Here is db.
> ------------------------------------------------------
> $TTL 3600
>
> 123.168.192.in-addr.arpa. IN SOA bornheim.xzy.de.
> boss.xyz.de. (
> 1 ; Serial
> 3h ; Refresh
> 1h ; Retry
> 1w ; Expire
> 1h ) ; Minimum
> ;
> ; Name Servers
> ;
> 123.168.192.in-addr.arpa. IN NS bornheim.xzy.de.
>
> ;
> ; Addresses point to canonical names
> ;
> 187.123.168.192. IN PTR bornheim.xzy.de.
> 185.123.168.192. IN PTR aachen.xzy.de.
> 130.123.168.192. IN PTR rome.xzy.de.
> 254.123.168.192. IN PTR soho.xzy.de.
>
> ------------------------------------------------------
>
>
> Here is db.xzy.de
> ......................................................
> $TTL 3600
>
> xzy.de. IN SOA bornheim.xzy.de. boss.xyz.de. (
> 1 ; Serial
> 3h ; Refresh
> 1h ; Retry
> 1w ; Expire
> 1h ) ; Minimum
> ;
> ; Name Servers
> ;
> xzy.de. IN NS bornheim.xzy.de.
>
> ;
> ; Addresses for the cononical names
> ;
> localhost.xzy.de. IN A 127.0.0.1
> bornheim.xzy.de. IN A 192.168.123.187
> aachen.xzy.de. IN A 192.168.123.185
> rome.xzy.de. IN A 192.168.123.130
> soho.xzy.de. IN A 192.168.123.254
> ;
> ; Aliases
> ;
> bennem.xzy.de. IN CNAME soho.xzy.de.
> -----------------------------------------------------------
>
> Here is db.127.0.0
> ........................................................----
> $TTL 3h
>
> 0.0.127.in-addr.arpa. IN SOA bornheim.xzy.de. boss.xyz.de. (
> 1 ; Serial
> 3h ; Refresh
> 1h ; Retry
> 1w ; Expire
> 1h ) ; Minimum
> ;
> ; Name Servers
> ;
> 0.0.127.in-addr.arpa. IN NS bornheim.xzy.de.
>
> ;
> ; Addresses point to canonical names
> ;
> 1.0.0.127.in-addr.arpa. IN PTR localhost.
> -----------------------------------------------------------
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