Bug#428434: marked as done (libc6: Resolver prefers IPv4 to IPv6 in some cases)
Your message dated Wed, 13 Jun 2007 10:42:50 +0200
with message-id <466FAE0A.1090603@aurel32.net>
and subject line Bug#428434: libc6: Resolver prefers IPv4 to IPv6 in some cases
has caused the attached Bug report to be marked as done.
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--- Begin Message ---
Package: libc6
Version: 2.3.6.ds1-13
Severity: normal
Hi,
In some cases the resolver prefers IPv4 to IPv6. This happens when:
- the A-RR is a RFC 1918 Address
- there is a more specific route for this address
Example:
$ ip route list table all 192.168.17.1
local 192.168.17.1 dev lo table 255 proto kernel scope host src 192.168.17.1
$ host -t any test1.libc6test.swapon.de
test1.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
test1.libc6test.swapon.de has address 10.10.10.10
$ host -t any test2.libc6test.swapon.de
test2.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
test2.libc6test.swapon.de has address 192.168.17.1
$ host -t any test3.libc6test.swapon.de
test3.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
test3.libc6test.swapon.de has address 81.169.139.143
$ telnet test1.libc6test.swapon.de
Trying 2001:6f8:12ec::1...
Trying 10.10.10.10...
$ telnet test2.libc6test.swapon.de
Trying 192.168.17.1...
Trying 2001:6f8:12ec::1...
$ telnet test3.libc6test.swapon.de
Trying 2001:6f8:12ec::1...
Trying 81.169.139.143...
The releases "2.3.2.ds1-22sarge6" (Sarge) and "2.5-9+b1" (Lenny) are not
affected.
-- System Information:
Debian Release: 4.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-4-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages libc6 depends on:
ii tzdata 2007b-1 Time Zone and Daylight Saving Time
libc6 recommends no packages.
--- End Message ---
--- Begin Message ---
Version: 2.5-1
Friedemann Stoyan a écrit :
> Package: libc6
> Version: 2.3.6.ds1-13
> Severity: normal
>
> Hi,
>
> In some cases the resolver prefers IPv4 to IPv6. This happens when:
>
> - the A-RR is a RFC 1918 Address
> - there is a more specific route for this address
>
> Example:
>
> $ ip route list table all 192.168.17.1
> local 192.168.17.1 dev lo table 255 proto kernel scope host src 192.168.17.1
>
> $ host -t any test1.libc6test.swapon.de
> test1.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
> test1.libc6test.swapon.de has address 10.10.10.10
>
> $ host -t any test2.libc6test.swapon.de
> test2.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
> test2.libc6test.swapon.de has address 192.168.17.1
>
> $ host -t any test3.libc6test.swapon.de
> test3.libc6test.swapon.de has IPv6 address 2001:6f8:12ec::1
> test3.libc6test.swapon.de has address 81.169.139.143
>
> $ telnet test1.libc6test.swapon.de
> Trying 2001:6f8:12ec::1...
> Trying 10.10.10.10...
>
> $ telnet test2.libc6test.swapon.de
> Trying 192.168.17.1...
> Trying 2001:6f8:12ec::1...
>
> $ telnet test3.libc6test.swapon.de
> Trying 2001:6f8:12ec::1...
> Trying 81.169.139.143...
>
> The releases "2.3.2.ds1-22sarge6" (Sarge) and "2.5-9+b1" (Lenny) are not
> affected.
>
Marking this bug as fixed in glibc versions 2.5-1 and later.
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@debian.org | aurelien@aurel32.net
`- people.debian.org/~aurel32 | www.aurel32.net
--- End Message ---
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