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At 10:07 AM -0700 5/23/01, Global Homes Webmaster wrote:
Re: without asking... is the reverse delegated to me?
From: Men & Mice Support
Date: Wednesday, May 23, 2001
Time: 6:21:03 pm
>On 05/22/01 at 18:59, Men & Mice Support wrote:
>
> > That depends on your ISP - are they able to handle the job competently?
> >
> > If your PTR records are missing or incorrect, the only problem that I
> > know of that you're likely to have is with mail. Some mail servers
> > will refuse to talk to your mail server. However, there may be other
> > problems I'm not aware of - PTR records are often used as a means of
> > verifying that you are really who you say you are.
>
>Another relatively obscure problem that may also occur is that some IRC
>servers (especially on the more populous IRC nets) will not allow connections
>from machines without PTRs. There can be a lot of, shall we say, immature
>behavior in IRC, depending on the channel. Requiring reverse DNS resolution is
>one way to discourage IP spoofing, a favorite tactic for doing stupid things
>anonymously.
That's a good point, and is but one example of PTR record
requirements for client machines. Another is FTP, where the same
explanation can be applied.
For servers, though, I don't know of any service that needs to have a
PTR record that resolves to a particular value aside from mail
service. Still, it's good practice, since you may someday want to run
client software from an address currently used as for a server.
____________________________________________________________________
Chris Buxton Men & Mice
cbuxton@menandmice.com We Make DNS Easy!
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