[37547] in North American Network Operators' Group
RE: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS
daemon@ATHENA.MIT.EDU (Pyda Srisuresh)
Tue May 15 13:43:37 2001
Message-ID: <20010515174110.44998.qmail@web13802.mail.yahoo.com>
Date: Tue, 15 May 2001 10:41:10 -0700 (PDT)
From: Pyda Srisuresh <srisuresh@yahoo.com>
To: "Vivien M." <vivienm@dyndns.org>, Valdis.Kletnieks@vt.edu,
Adam McKenna <adam@flounder.net>
Cc: nanog@nanog.org
In-Reply-To: <NDBBKECCEHKIHGIMJECAGEGNCJAA.vivienm@dyndns.org>
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Errors-To: owner-nanog-outgoing@merit.edu
--- "Vivien M." <vivienm@dyndns.org> wrote:
> > -----Original Message-----
> > From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> > Pyda Srisuresh
> > Sent: May 15, 2001 12:03 PM
> > To: Valdis.Kletnieks@vt.edu; Adam McKenna
> > Cc: nanog@nanog.org
> > Subject: Re: To CAIS Engineers - WAKE UP AND TAKE CARE OF YOUR CUSTOMERS
> >
> >
> > Forcing hostnames and PTR's to match will also prevent people from NAT
> > land accessing your servers. There are hardly any NAT implementations
> > that do dynamic DNS updates.
>
> Your NAT implementation must not be the same as the ones I've worked with,
> because with the [simple] ones I've seen, you have something like
> 192.168.0.0/24 all coming out and talking to the world as 1.2.3.4 (the more
> elaborate implementations give each private IP a unique outside IP, in which
> case you just set up your DNS for each IP. A little more work, perhaps,
> but...). Now, if 1.2.3.4 has proper matching forward/reverse DNS lookups, I
> don't see how people behind someone else's NAT pose a problem.
>
Sure, not in the case of NAPT (assuming you have a PTR record set for
1.2.3.4). My point is merely that there may be many cases it is not so
straight forward to do the DNS updates for PTR records.
> Vivien
> --
> Vivien M.
> vivienm@dyndns.org
> Assistant System Administrator
> Dynamic DNS Network Services
> http://www.dyndns.org/
>
cheers,
suresh
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