What's new on the 127.0.0/24 block in 7?

[Andy Dills]

On Mon, 3 Mar 2008, Chris H. wrote:

> > Are you sure it's a /24 you are talking about? My 7.0 disks install
> > 127.0.0.1/8 here.
> 
> Really? Where did you get the install disc? Mine clearly doesn't. :(
> All I am provided is 127.0.0.1 - not 127.0.0.2,3...

127.0.0.1/8 just means 127.0.0.1 with a netmask of 255.0.0.0. It doesn't 
imply a default behavior of binding to any other address than 127.0.0.1.

But I'm still really confused what you're trying to do...

See, the idea of returning multiple 127.0.0.X addressess within RBL is to 
convey different information while using a single zone. 

In the beginning, the RBLs would just reply with 127.0.0.1 and use 
different zones to imply different contexts...now you use a single zone 
with different 127.0.0.X addresses to convey the same information.

But...you don't actually do anything with that resolution beyond determine 
if a given record is listed or not. You don't actually need to configure 
or use the various 127.0.0.X addresses that might get returned.

On the other hand, if you're using multiple rbldnsd instances, one per 
zone... hile it's a pain you can indeed configured rbldns to serve 
multiple zones. Or just bind the additional loopback instances 


BTW, /etc/netstart is a nice shortcut to avoid fatfingering an ifconfig. 

Andy

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Andy Dills
Xecunet, Inc.
www.xecu.net
301-682-9972
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