Re: [cobalt-users] bind bug on reverse dns

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

GS> Date: Sun, 13 Apr 2003 19:04:46 +0100
GS> From: Graham Scanlan


GS> The dns is setup with the public ip 62.171.199.74 and there is a reverse
GS> address on our internal subnet mask.

Can you please explain "reverse address on our internal subnet
mask"?


GS> The server ip address in tcp/ip settings is the internal ip.
GS> mx record are also set to oakwood-surrey.org.uk but this does not work

I see an MX record for oakwood-surrey.org.uk on your nameserver;
on granitecanyon, however, things look broken.


GS> either. I still think it is a dns authority issue because our domain is
GS> looking for the RM dns server.

Yes, RM needs to delegate reverse to you.  However, your NS does
not know it's authoritative for 62.171.199.74's reverse DNS:

	$ dig +norec @62.171.199.74 74.199.171.62.in-addr.arpa. ptr

	; <<>> DiG 8.3 <<>> +norec @62.171.199.74 74.199.171.62.in-addr.arpa. ptr
	; (1 server found)
	;; res options: init defnam dnsrch
	;; got answer:
	;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9083
	;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 0
	;; QUERY SECTION:
	;;	74.199.171.62.in-addr.arpa, type = PTR, class = IN

	;; AUTHORITY SECTION:
	.			6D IN NS	M.ROOT-SERVERS.NET.
	.			6D IN NS	A.ROOT-SERVERS.NET.
	.			6D IN NS	B.ROOT-SERVERS.NET.
	.			6D IN NS	C.ROOT-SERVERS.NET.
	.			6D IN NS	D.ROOT-SERVERS.NET.
	.			6D IN NS	E.ROOT-SERVERS.NET.
	.			6D IN NS	F.ROOT-SERVERS.NET.
	.			6D IN NS	G.ROOT-SERVERS.NET.
	.			6D IN NS	H.ROOT-SERVERS.NET.
	.			6D IN NS	I.ROOT-SERVERS.NET.
	.			6D IN NS	J.ROOT-SERVERS.NET.
	.			6D IN NS	K.ROOT-SERVERS.NET.
	.			6D IN NS	L.ROOT-SERVERS.NET.

	;; Total query time: 143 msec
	;; FROM: iron to SERVER: 62.171.199.74  62.171.199.74
	;; WHEN: Sun Apr 13 21:20:50 2003
	;; MSG SIZE  sent: 44  rcvd: 255

(Apologies for long lines.)


GS> ns1.oakwood-surrey.org.uk is not RFC1918.

Okay, good.  Some people mistakenly use "behind firewall" to
refer indicate "RFC1918-addressed system behind NAT device", so I
wanted to clarify.


Eddy
--
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