Bug 198011

Summary:	net-dns/bind default 127.zone configuration incorrect
Product:	Gentoo Linux	Reporter:	Rajiv Aaron Manglani (RETIRED) <rajiv>
Component:	New packages	Assignee:	Konstantin Arkhipov (RETIRED) <voxus>
Status:	RESOLVED FIXED
Severity:	major	CC:	bind+disabled, dertobi123
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Rajiv Aaron Manglani (RETIRED) gentoo-dev

2007-11-04 02:07:10 UTC

bug #15637 made two changes to the reverse dns zone for 127.0.0.0:

the zone was changed from "0.0.127.in-addr.arpa" to "127.in-addr.arpa"

and the zone data was changed from:
1               1D IN PTR localhost. 
to 
*               1D IN PTR localhost.


the first change was correct since the reverse zone is actually 127.0.0.0/8
and not 127.0.0.0/24. without that change, any queries for addresses in
127.0.0.0/8 not in 127.0.0.0/24 go to the root servers.

however the second change is not needed. eg:

dig PTR 1.0.0.127.dnsbugtest.1.0.0.127.in-addr.arpa.
dig PTR 2.0.0.127.in-addr.arpa.

both return "localhost." with the "*" zone when clearly those names should
not resolve. only 127.0.0.1 should resolve to localhost. since the only
address for localhost. is 127.0.0.1.

changing the "127.zone" file back to:

1               1D IN PTR localhost. 

fixes this problem. this fix is required for wide-area dns service discovery
via mDNSResponder.

Comment 1 Tobias Scherbaum (RETIRED) gentoo-dev

2008-05-03 18:21:58 UTC

This is fixed in CVS. Thanks for reporting!