Now I'm in trouble...

Mark Andrews Mark_Andrews at isc.org
Fri Oct 7 05:16:18 UTC 2005


	I would only have one PTR record.  That way you ensure that
	the PTR record checked matches the name in the HELO/EHLO
	of the SMTP transaction.

	123.120.156.124.66.in-addr.arpa.  IN PTR  mail.light-family.com.

	Mark

% telnet mail.light-family.com smtp
Trying 66.124.156.123...
Connected to mail.light-family.com.
Escape character is '^]'.
220 mail.light-family.com ESMTP Postfix
quit
221 Bye
Connection closed by foreign host.
% 

; <<>> DiG 8.3 <<>> -x ptr 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20494
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 3, ADDITIONAL: 1
;; QUERY SECTION:
;;	123.156.124.66.in-addr.arpa, type = PTR, class = IN

;; ANSWER SECTION:
123.156.124.66.in-addr.arpa.  1h55m49s IN CNAME  123.120.156.124.66.in-addr.arpa.
123.120.156.124.66.in-addr.arpa.  23h55m55s IN PTR  light-family.com.
123.120.156.124.66.in-addr.arpa.  23h55m55s IN PTR  www.light-family.com.
123.120.156.124.66.in-addr.arpa.  23h55m55s IN PTR  dns1.light-family.com.
123.120.156.124.66.in-addr.arpa.  23h55m55s IN PTR  mail.light-family.com.

;; AUTHORITY SECTION:
120.156.124.66.in-addr.arpa.  23h55m55s IN NS  dns1.light-family.com.
120.156.124.66.in-addr.arpa.  23h55m55s IN NS  ns1.4servers.com.
120.156.124.66.in-addr.arpa.  23h55m55s IN NS  ns2.4servers.com.

;; ADDITIONAL SECTION:
dns1.light-family.com.	5h54m6s IN A	66.124.156.123

;; Total query time: 2 msec
;; FROM: drugs.dv.isc.org to SERVER: 192.168.191.233
;; WHEN: Fri Oct  7 15:12:39 2005
;; MSG SIZE  sent: 45  rcvd: 228

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org



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