Bug#373758: [Pkg-cups-devel] Bug#373758: Debian testing instalation & Debian reference problem in /etc/hosts

[Roger Leigh]

Pedro Andrés Aranda Gutiérrez <paag at tid.es> writes:

> Package: cupsys-bsd
> Version: 1.2.1-2
>
> I know this is a strange combination but I have encountered
> a situation which invalidates what paragraph "10.4 Domain
> Name Service (DNS)" of the Debian reference says. This is
> important, because it influences the way Debian installer
> works:
>
> After installation, I had on my /etc/hosts
>
> 127.0.0.1 localhost
> 127.0.1.1 paag
>
> I'm migrating from a UNIX platform and in my company, the
> LPD servers have access lists in order to make sure that
> registered users on registered machines get access to the
> printers. Being a registered user, I installed CUPS and
> the LPD backend.
>
> My printing jobs got rejected, because the LPD backend
> sent 'localhost' as originating client to the LPD server.
> The user name was correct, but since the ACL only allowed
> print jobs from "paag at paag", my printing jobs where discarded.
>
> The answer to the problem has been to rewrite my /etc/hosts
> so that it reads:
>
> 127.0.0.1 paag localhost
>
> in the first line. And BTW, this is the only way I can print.

It's failing because the reverse hostname lookup failed.  This might
indicate a DNS issue on your network.  Does your DNS do PTR lookups?

For my system, as an example:

$ hostname
hardknott
$ hostname -f
hardknott.home.whinlatter.ukfsn.org

$ host -t A hardknott
hardknott.home.whinlatter.ukfsn.org has address 10.0.0.1
$ host -t PTR 10.0.0.1
1.0.0.10.in-addr.arpa domain name pointer hardknott.home.whinlatter.ukfsn.org.

Also test:

$ host -t A localhost
$ host -t PTR 127.0.0.1

and then repeat for the server.  Can you post the results of all the
above here?


This may be also be related to this bug:

http://www.cups.org/str.php?L989+P0+S0+C0+I0+E0+Qrleigh

Could you try these three settings in cupsd.conf:

HostNameLookups On
HostNameLookups Off
HostNameLookups Double

These affect the CUPS name lookup behaviour.  It does special case
localhost in some circumstances, which caused the above bug.


Regards,
Roger

-- 
Roger Leigh
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