Re: Reverse dns lookup

[Rick Stevens <rstevens vitalstream com>]

Scott A. Zanke wrote:
> Hello,
> I am currently running a personal RH 7.0 web/smtp/pop/ftp/ssh server on 
> directvinternet.dsl with no reverse dns lookup.
> I have a friend looking to run a server for business purposes and have been 
> looking at dsl and T1 providers for him.
> What is the disadvantages to a provider that doesn't do reverse dns lookup.
> I'm fairly sure that business class providers will provide this service. It 
> just got me thinking about what's lacking without it.

Some mail servers won't let you in because you may spoof addresses.
Some FTP servers can't validate you and won't let you in.  IRC
systems may reject you.  Secure connections usually fail (ssh and
the like) because they can't prove you say you are who you say you
are.

In general, anything that has a concept of "security" will want a
valid reverse DNS lookup, even X sometimes has problems without it.
All in all, it's a "bad thing" to not have it.

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- Rick Stevens, SSE, VitalStream, Inc.      rstevens vitalstream com -
- 949-743-2010 (Voice)                    http://www.vitalstream.com -
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