Reverse DNS woes.
Reid Sutherland
reid at isys.ca
Tue Jul 24 01:46:29 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?
-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
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