Reverse DNS woes.

Mark.Andrews at nominum.com Mark.Andrews at nominum.com
Tue Jul 24 00:48:11 UTC 2001


> On July 23, 2001 07:42 pm, Mark.Andrews at nominum.com wrote:
> > > Hi everyone,
> > >
> > > 	I'm very confused as too why my reverse DNS is no longer working.  What
> > >  is
> > > going wrong here?  I must have done something wrong, please straighten me
> > > out.
> >
> > 	The problem here is that the parent servers and the child servers
> > 	disagree about who is serving the zone.
> >
> > 	Either make NS1.SUDBURYWIRED.COM and NS2.SUDBURYWIRED.COM
> > 	authoritative for the zone or update the delgation to point
> > 	to ns1.isys.ca and ns2.isys.ca.
> >
> > 	Mark
> 
> Could I tell the people that control ns1.sudburywired.com to 'forward' all 
> calls to my IP block to my server?

	No.

> 
> -reid
> 
> > > See details below.
> > >
> > > _____________________________________________________
> > >
> > > IP used in all tests: 216.223.80.10
> > >
> > > Output from nslookup on a.root-servers.net
> > > _____________________________________________________
> > > simple:~# nslookup
> > > Default Server:  localhost
> > > Address:  127.0.0.1
> > >
> > > > server a.root-servers.net
> > >
> > > Default Server:  a.root-servers.net
> > > Address:  198.41.0.4
> > >
> > > > set debug
> > > > 216.223.80.10
> > >
> > > Server:  a.root-servers.net
> > > Address:  198.41.0.4
> > >
> > > ;; res_nmkquery(QUERY, 10.80.223.216.in-addr.arpa, IN, PTR)
> > > ------------
> > > Got answer:
> > >     HEADER:
> > >         opcode = QUERY, id = 37028, rcode = NOERROR
> > >         header flags:  response, want recursion
> > >         questions = 1,  answers = 0,  authority records = 2,  additional
> > > = 0
> > >
> > >     QUESTIONS:
> > >         10.80.223.216.in-addr.arpa, type = PTR, class = IN
> > >     AUTHORITY RECORDS:
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = NS1.SUDBURYWIRED.COM
> > >         ttl = 345600 (4D)
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = NS2.SUDBURYWIRED.COM
> > >         ttl = 345600 (4D)
> > >
> > > ------------
> > > Authoritative answers can be found from:
> > > 80.223.216.in-addr.arpa
> > >         nameserver = NS1.SUDBURYWIRED.COM
> > >         ttl = 345600 (4D)
> > > 80.223.216.in-addr.arpa
> > >         nameserver = NS2.SUDBURYWIRED.COM
> > >         ttl = 345600 (4D)
> > > *** No address (A) records available for 216.223.80.10
> > > ______________________________________________________
> > >
> > >
> > > Output from nslookup on ns1.sudburywired.com
> > > ______________________________________________________
> > > simple:~# nslookup
> > > Default Server:  localhost
> > > Address:  127.0.0.1
> > >
> > > > server ns1.sudburywired.com
> > >
> > > Default Server:  ns1.sudburywired.com
> > > Address:  216.223.90.2
> > >
> > > > set debug
> > > > 216.223.80.10
> > >
> > > Server:  ns1.sudburywired.com
> > > Address:  216.223.90.2
> > >
> > > ;; res_nmkquery(QUERY, 10.80.223.216.in-addr.arpa, IN, PTR)
> > > ------------
> > > Got answer:
> > >     HEADER:
> > >         opcode = QUERY, id = 1077, rcode = NOERROR
> > >         header flags:  response, want recursion, recursion avail.
> > >         questions = 1,  answers = 1,  authority records = 2,  additional
> > > = 1
> > >
> > >     QUESTIONS:
> > >         10.80.223.216.in-addr.arpa, type = PTR, class = IN
> > >     ANSWERS:
> > >     ->  10.80.223.216.in-addr.arpa
> > >         name = simple.isys.ca
> > >         ttl = 14160 (3h56m)
> > >     AUTHORITY RECORDS:
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = ns1.isys.ca
> > >         ttl = 14160 (3h56m)
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = ns2.isys.ca
> > >         ttl = 14160 (3h56m)
> > >     ADDITIONAL RECORDS:
> > >     ->  ns1.isys.ca
> > >         internet address = 216.223.80.10
> > >         ttl = 5759 (1h35m59s)
> > >
> > > ------------
> > > Name:    simple.isys.ca
> > > Address:  216.223.80.10
> > > ______________________________________________________
> > >
> > >
> > > Output from nslookup on simple.isys.ca
> > > ______________________________________________________
> > > simple:~# nslookup
> > > Default Server:  localhost
> > > Address:  127.0.0.1
> > >
> > > > set debug
> > > > 216.223.80.10
> > >
> > > Server:  localhost
> > > Address:  127.0.0.1
> > >
> > > ;; res_nmkquery(QUERY, 10.80.223.216.in-addr.arpa, IN, PTR)
> > > ------------
> > > Got answer:
> > >     HEADER:
> > >         opcode = QUERY, id = 11129, rcode = NOERROR
> > >         header flags:  response, auth. answer, want recursion, recursion
> > > avail.
> > >         questions = 1,  answers = 1,  authority records = 2,  additional
> > > = 2
> > >
> > >     QUESTIONS:
> > >         10.80.223.216.in-addr.arpa, type = PTR, class = IN
> > >     ANSWERS:
> > >     ->  10.80.223.216.in-addr.arpa
> > >         name = simple.isys.ca
> > >         ttl = 14400 (4H)
> > >     AUTHORITY RECORDS:
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = ns1.isys.ca
> > >         ttl = 14400 (4H)
> > >     ->  80.223.216.in-addr.arpa
> > >         nameserver = ns2.isys.ca
> > >         ttl = 14400 (4H)
> > >     ADDITIONAL RECORDS:
> > >     ->  ns1.isys.ca
> > >         internet address = 216.223.80.10
> > >         ttl = 7200 (2H)
> > >     ->  ns2.isys.ca
> > >         internet address = 216.223.80.11
> > >         ttl = 7200 (2H)
> > >
> > > ------------
> > > Name:    simple.isys.ca
> > > Address:  216.223.80.10
> > > ______________________________________________________
> > >
> > >
> > > Output from nslookup on ANY other server (example used: ns2.mci.net)
> > > ______________________________________________________
> > > simple:~# nslookup
> > > Default Server:  localhost
> > > Address:  127.0.0.1
> > >
> > > > server ns2.mci.net
> > >
> > > Default Server:  ns2.mci.net
> > > Address:  204.147.128.70
> > >
> > > > set debug
> > > > 216.223.80.240
> > >
> > > Server:  ns2.mci.net
> > > Address:  204.147.128.70
> > >
> > > ;; res_nmkquery(QUERY, 240.80.223.216.in-addr.arpa, IN, PTR)
> > > ------------
> > > Got answer:
> > >     HEADER:
> > >         opcode = QUERY, id = 60051, rcode = SERVFAIL
> > >         header flags:  response, want recursion, recursion avail.
> > >         questions = 1,  answers = 0,  authority records = 0,  additional
> > > = 0
> > >
> > >     QUESTIONS:
> > >         240.80.223.216.in-addr.arpa, type = PTR, class = IN
> > >
> > > ------------
> > > *** ns2.mci.net can't find 216.223.80.240: Server failed
> > > ______________________________________________________
> > >
> > >
> > > Output from the reverse zone file
> > > ______________________________________________________
> > > $TTL 14400
> > > @       IN      SOA     ns1.isys.ca.     root.isys.ca. (
> > >
> > >                         2001072301
> > >                         10800           ; Refresh 3 hours
> > >                         900             ; Retry 15 minutes
> > >                         604800          ; Expire 7 days
> > >                         7200 )          ; Minimum ttl 2 hours
> > >
> > >                                 IN      NS              ns1.isys.ca.
> > >                                 IN      NS              ns2.isys.ca.
> > >
> > > 1       IN      PTR     atm0-gw01-sud.isys.ca.
> > > 2       IN      PTR     fw01-sud.isys.ca.
> > > 3       IN      PTR     sw01-sud.isys.ca.
> > > 4       IN      PTR     sw02-sud.isys.ca.
> > > 5       IN      PTR     sw03-sud.isys.ca.
> > >
> > > 10      IN      PTR     simple.isys.ca.
> > > 11      IN      PTR     nulled.isys.ca.
> > > 12      IN      PTR     complex.isys.ca.
> > > [...]
> > > _________________________________________________________
> > >
> > >
> > > Any ideas?
> > >
> > > -reid
> >
> > --
> > Mark Andrews, Nominum Inc.
> > 1 Seymour St., Dundas Valley, NSW 2117, Australia
> > PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com


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