[dns-operations] Maybe I'm just not with it...

[Brian Keefer]

On Dec 7, 2009, at 4:05 AM, Lutz Donnerhacke wrote:

> * Joe Greco wrote:
>> Can anybody imagine what the advantage of this is?
>> 
>> Non-authoritative answer:
>> 1.1.20.123.in-addr.arpa name = localhost.
> 
> Great for hacking ...
> 
> Severals systems does rely on reverse DNS results for ACLs.
> 

I've heard that some MTAs allow relaying if RDNS matches localhost.  I haven't personally seen it, but a lot of dumb assumptions are made based on reverse DNS so I wouldn't be surprised.


--
bk