www ---> 10.0.0.2 ns1 ---> 10.0.0.2 servershostname ---> 10.0.0.2 10.0.0.2 ---> servershostname.domain.com I think this is the situation Joshua is describing, where you might rev-map to a server name (Whatever hostnames you assign locally to your boxen), but where that hostname is NOT "ns1.domain.com") At 12:33 PM -0700 8/18/00, Gary E. Miller wrote:
Yo Joshua!
On Fri, 18 Aug 2000, Joshua Goodall wrote:
c) not everyone wants the reverse to match the forward (is this an RFC violation? I hope not :)).
RFC 1912, Sec 2.1:
" Make sure your PTR and A records match. For every IP address, there should be a matching PTR record in the in-addr.arpa domain. If a host is multi-homed, (more than one IP address) make sure that all IP addresses have a corresponding PTR record (not just the first one). Failure to have matching PTR and A records can cause loss of Internet services similar to not being registered in the DNS at all. Also, PTR records must point back to a valid A record, not a alias defined by a CNAME. It is highly recommended that you use some software which automates this checking, or generate your DNS data from a database which automatically creates consistent data."
I have yet to hear a convincing argument why this RFC should be ignored. I have seen many problems when this is ignored.
RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701 gem@rellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676