Resolver Question

[Kevin Darcy]

Um no, scratch that. It's emitting the error message because it can't do a reverse
lookup of 206.214.228.101, then it's *failing*over* (duh) to 206.214.228.2, which
happens to have 2 PTR records, which doesn't seem to bother it a bit. As if having 2
PTR's for a nameserver is any more or less dangerous than having 0....


- Kevin

Kevin Darcy wrote:

> Offhand, I'd say nslookup is getting confused by the fact that multiple PTR's
> exist for  2.228.214.206.in-addr.arpa.
>
> Get rid of the extraneous PTR and use a real lookup tool like "dig".
>
> - Kevin
>
> Michael wrote:
>
> > My DNS seems to be operating correctly. The operative word there
> > being seems.  I am no BIND wizard.
> >
> > I get the following output when I access my name server to lookup
> > the name of the name server (or any other name) debug is set in
> > the resolver.
> >
> > COuld someone enlighten me as to the meaning of the first few
> > lines of the output from nslookup?
> >
> > internal.net is a ficticious name for the internal domain.
> > The external domain is urbanna.net (and a couple of others).
> >
> > Changing this file seems to have no effect I still get the
> > error on the first nameserver listed in the file.
> >
> > /etc/resolv.conf contains:
> > domain internal.net
> > search internal.net
> > nameserver 206.214.228.101
> > nameserver 206.214.228.2
> > nameserver 206.214.228.45
> > options debug
> >
> > The command was $>nslookup vast.urbanna.net.  It produced the following
> > output. This first line makes no sense to me. Help.
> >
> > *** Can't find server name for address 206.214.228.101: No information
> >
> > ;; res_setoptions(" debug
> > ", "conf")..
> > ;;      debug
> > ;; res_nmkquery(QUERY, 101.228.214.206.in-addr.arpa, IN, PTR)
> > ------------
> > Got answer:
> >     HEADER:
> >         opcode = QUERY, id = 51920, rcode = NOERROR
> >         header flags:  response, auth. answer, want recursion, recursion avail.
> >         questions = 1,  answers = 0,  authority records = 1,  additional = 0
> >
> >     QUESTIONS:
> >         101.228.214.206.in-addr.arpa, type = PTR, class = IN
> >     AUTHORITY RECORDS:
> >     ->  101.228.214.206.in-addr.arpa
> >         ttl = 86400 (1D)
> >         origin = vast.urbanna.net
> >         mail addr = root.urbanna.net
> >         serial = 20000824
> >         refresh = 10800 (3H)
> >         retry   = 1800 (30M)
> >         expire  = 604800 (1W)
> >         minimum ttl = 86400 (1D)
> >
> > ------------
> > 101.228.214.206.in-addr.arpa
> >         ttl = 86400 (1D)
> >         origin = vast.urbanna.net
> >         mail addr = root.urbanna.net
> >         serial = 20000824
> >         refresh = 10800 (3H)
> >         retry   = 1800 (30M)
> >         expire  = 604800 (1W)
> >         minimum ttl = 86400 (1D)
> > ;; res_nmkquery(QUERY, 2.228.214.206.in-addr.arpa, IN, PTR)
> > ------------
> > Got answer:
> >     HEADER:
> >         opcode = QUERY, id = 51921, rcode = NOERROR
> >         header flags:  response, auth. answer, want recursion, recursion avail.
> >         questions = 1,  answers = 2,  authority records = 1,  additional = 1
> >
> >     QUESTIONS:
> >         2.228.214.206.in-addr.arpa, type = PTR, class = IN
> >     ANSWERS:
> >     ->  2.228.214.206.in-addr.arpa
> >         name = myhost.ccsinc.com
> >         ttl = 86400 (1D)
> >     ->  2.228.214.206.in-addr.arpa
> >         name = mail.ccsinc.com
> >         ttl = 86400 (1D)
> >     AUTHORITY RECORDS:
> >     ->  228.214.206.in-addr.arpa
> >         nameserver = myhost.ccsinc.com
> >         ttl = 86400 (1D)
> >     ADDITIONAL RECORDS:
> >     ->  myhost.ccsinc.com
> >         internet address = 206.214.228.2
> >         ttl = 86400 (1D)
> >
> > ------------
> > Server:  myhost.ccsinc.com
> > Address:  206.214.228.2
> >
> > ;; res_nmkquery(QUERY, vast.urbanna.net, IN, A)
> > ------------
> > Got answer:
> >     HEADER:
> >         opcode = QUERY, id = 51922, rcode = NOERROR
> >         header flags:  response, want recursion, recursion avail.
> >         questions = 1,  answers = 1,  authority records = 1,  additional = 1
> >
> >     QUESTIONS:
> >         vast.urbanna.net, type = A, class = IN
> >     ANSWERS:
> >     ->  vast.urbanna.net
> >         internet address = 206.214.228.101
> >         ttl = 82264 (22h51m4s)
> >     AUTHORITY RECORDS:
> >     ->  urbanna.NET
> >         nameserver = vast.urbanna.net
> >         ttl = 9845 (2h44m5s)
> >     ADDITIONAL RECORDS:
> >     ->  vast.urbanna.net
> >         internet address = 206.214.228.101
> >         ttl = 82264 (22h51m4s)
> >
> > ------------
> > Non-authoritative answer:
> > Name:    vast.urbanna.net
> > Address:  206.214.228.101
> >
> > --
> > Public Key at http://pgpkeys.mit.edu:11371
> > Public Key Encryption?  http://www.cryptography.org/getpgp.htm
> > If you don't have it, you need it.