REVERSE DNS Practices.

Steven Champeon schampeo at hesketh.com
Thu Mar 26 00:22:17 CDT 2009


on Thu, Mar 26, 2009 at 10:26:59AM +1030, Tom Wright wrote:
> Don't be afraid to create zones for each
> location, DNS lends itself to this kind of
> hierarchy naturally.
>
> I find this is tidier than lengthy A records.
>
> I.e, hostname.location.domain

And yet makes it more difficult for anyone else to simply set
aside ALL of your dynamics as offlimits using simple substrings
(say, in sendmail's access.db or using postfix check_client_access).

Don't be that guy.

> W: http://www.internode.on.net

Oh, yeah. You already are (quick! guess which of these are actually
dynamic, and which static, who's residential, who's business, etc.):

adsl.internode.on.net 
gaw.internode.on.net  
padsl.internode.on.net	
adsl.adelaide.on.net	
link.internode.on.net	
as0.adl2.internode.on.net	
lns1.adl2.internode.on.net	
lns2.adl2.internode.on.net	
lns3.adl2.internode.on.net	
lns4.adl2.internode.on.net	
lns11.adl2.internode.on.net	
lns5.adl2.internode.on.net	
lns1.adl4.internode.on.net	
lns2.adl4.internode.on.net	
lns3.adl4.internode.on.net	
lns10.adl6.internode.on.net	
lns1.bne1.internode.on.net	
lns2.bne1.internode.on.net	
lns1.bne4.internode.on.net	
lns2.bne4.internode.on.net	
lns1.cbr1.internode.on.net	
lns2.cbr1.internode.on.net	
lns1.hba1.internode.on.net	
lns1.mel4.internode.on.net	
lns2.mel4.internode.on.net	
lns3.mel4.internode.on.net	
lns4.mel4.internode.on.net	
lns1.mel6.internode.on.net	
lns2.mel6.internode.on.net	
lns4.mel6.internode.on.net	
lns1.per1.internode.on.net	
lns1.syd2.internode.on.net	
lns1.syd6.internode.on.net	
lns2.syd6.internode.on.net	
lns4.syd6.internode.on.net	
lns1.syd7.internode.on.net	
lns2.syd7.internode.on.net	
lns3.syd7.internode.on.net	
cor2.adl2.internode.on.net
lns10.adl2.internode.on.net
lns10.mel4.internode.on.net
lns10.syd6.internode.on.net
lns10.syd7.internode.on.net
nsw.adsl.internode.on.net
qld.adsl.internode.on.net
qld.padsl.internode.on.net
sa.adsl.internode.on.net
tas.adsl.internode.on.net
vic.adsl.internode.on.net
wa.adsl.internode.on.net

Oh, there's also 'static.internode.on.net', so the safe bet is to
assume that ALL of the rest are dynamic. Correct bet? Who knows.

-- 
hesketh.com/inc. v: +1(919)834-2552 f: +1(919)834-2553 w: http://hesketh.com/
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