nanog mailing list archives
Re: Performance Issues - PTR Records
From: Jimmy Hess <mysidia () gmail com>
Date: Sun, 6 Nov 2011 19:57:51 -0600
On Sun, Nov 6, 2011 at 7:10 PM, Mark Andrews <marka () isc org> wrote:
MacOS and Windows can both populate the reverse zone for you as can dhcp servers. The practice of filling out the reverse zone with fake PTR record [...]
OK.. let's say you're a DSL provider. Are you going to have your DHCP server populating the forward and reverse DNS? With what, the account holder's name? somename.example.com ? Wouldn't you say blahblah192-168-0-2.city.state.dsl.example.com provides more useful information? First of all, you know that the IP address is an end user, an access network's end user's one IP address, an endpoint, rather than a subnet assigned to an actual multinode network. Second of all, you know it's an ISP, and you have city and state information of the network service. This is more useful than arbitrary user made up hostname. The hostname is more meaningful on "real networks" such as SMB LANs, Enterprise intranets, web farms, server networks, and other places where generic records should not be assigned, but the PTR should be the actual hostname. If the IP address is dynamic or autoconfigured for _those_ types of networks, then yes, automatic RDNS registration makes sense. If it's static, not so much. Dynamic DNS registration is also complicated to make secure.... as in preventing hosts from updating other hosts' records or mucking around the zone in other unwanted ways requires complex key management and ACL configuration
-- Mark Andrews, ISC
-- -JH
Current thread:
- Re: Performance Issues - PTR Records, (continued)
- Re: Performance Issues - PTR Records PC (Nov 02)
- Re: Performance Issues - PTR Records J (Nov 02)
- Re: Performance Issues - PTR Records Matt Chung (Nov 02)
- Re: Performance Issues - PTR Records Larry Smith (Nov 02)
- Re: Performance Issues - PTR Records Jimmy Hess (Nov 02)
- Re: Performance Issues - PTR Records PC (Nov 02)
- Re: Performance Issues - PTR Records Paul Ebersman (Nov 04)
- Re: Performance Issues - PTR Records Tim Franklin (Nov 04)
- Re: Performance Issues - PTR Records Paul Ebersman (Nov 04)
- Re: Performance Issues - PTR Records Tom Lanyon (Nov 06)
- Re: Performance Issues - PTR Records Mark Andrews (Nov 06)
- Re: Performance Issues - PTR Records Jimmy Hess (Nov 06)
- Re: Performance Issues - PTR Records Robert Bonomi (Nov 06)
- Re: Performance Issues - PTR Records Chris Adams (Nov 06)
- Re: Performance Issues - PTR Records Tom Lanyon (Nov 06)
- Re: Performance Issues - PTR Records Robert Bonomi (Nov 06)
- Re: Performance Issues - PTR Records Valdis . Kletnieks (Nov 06)
- Re: Performance Issues - PTR Records Jimmy Hess (Nov 07)
- Re: Performance Issues - PTR Records Mark Andrews (Nov 06)
- Re: Performance Issues - PTR Records Brett Watson (Nov 06)
- Re: Performance Issues - PTR Records Bjørn Mork (Nov 06)
- Re: Performance Issues - PTR Records sthaug (Nov 07)