Package: ifupdown
Version: 0.8.16
Severity: normal
Tags: patch
Dear Maintainer,
runing Debian inside QEMU causes name resulution errors through
a broken DNS nameserver configuration.
Inside QEMU the network is configured to use dhcp:
$ cat /etc/network/interfaces
allow-hotplug eth0
iface eth0 inet dhcp
$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr 52:54:00:12:34:56
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::5054:ff:fe12:3456/64 Scope:Link
inet6 addr: fec0::5054:ff:fe12:3456/64 Scope:Site
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3215 (3.1 KiB) TX bytes:3638 (3.5 KiB)
$ cat /etc/resolv.conf
nameserver fec0::3
$ arp google.de
google.de: Host name lookup failure
Regards
Benedikt Spranger
-- System Information:
Debian Release: stretch/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.7.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages ifupdown depends on:
ii adduser 3.115
ii init-system-helpers 1.46
ii iproute2 4.8.0-1
ii libc6 2.24-5
ii lsb-base 9.20161101
Versions of packages ifupdown recommends:
ii isc-dhcp-client [dhcp-client] 4.3.5~b1-1
Versions of packages ifupdown suggests:
ii ppp 2.4.7-1+4
pn rdnssd <none>
-- no debconf information
>From c0ad9b025e37c35a1e99b89ce79f49162368d4b0 Mon Sep 17 00:00:00 2001
From: Benedikt Spranger <b.spran...@linutronix.de>
Date: Thu, 17 Nov 2016 09:55:45 +0100
Subject: [PATCH] force dhclient to IPv4 in IPv4 configuration
dhclient called without -4 may configure an IPv6 DNS entry as nameserver.
Force dhclient to IPv4 by adding th -4 flag.
---
inet.defn | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/inet.defn b/inet.defn
index 75e6744..182b56b 100644
--- a/inet.defn
+++ b/inet.defn
@@ -94,7 +94,7 @@ method dhcp
up
[[/bin/ip link set dev %iface% address %hwaddress%]]
- /sbin/dhclient -v -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
+ /sbin/dhclient -4 -v -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
[[-e IF_METRIC=%metric%]] \
if (execable("/sbin/dhclient"))
/sbin/pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]] \
@@ -108,7 +108,7 @@ method dhcp
elsif (1)
down
- /sbin/dhclient -v -r -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
+ /sbin/dhclient -4 -v -r -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
if (execable("/sbin/dhclient"))
/sbin/pump -i %iface% -r \
elsif (execable("/sbin/pump"))
@@ -280,7 +280,7 @@ method dhcp
up
[[/sbin/ifconfig %iface% link %hwaddress%]]
- /sbin/dhclient -v -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
+ /sbin/dhclient -4 -v -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
[[-e IF_METRIC=%metric%]] \
if (execable("/sbin/dhclient"))
/sbin/udhcpc -n -p /run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] \
@@ -293,7 +293,7 @@ method dhcp
elsif (1)
down
- /sbin/dhclient -v -r -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
+ /sbin/dhclient -4 -v -r -pf /run/dhclient.%iface%.pid -lf /var/lib/dhcp/dhclient.%iface%.leases -I -df /var/lib/dhcp/dhclient6.%iface%.leases %iface% \
if (execable("/sbin/dhclient"))
if test -f /run/udhcpc.%iface%.pid; then kill -USR2 $(/bin/cat /run/udhcpc.%iface%.pid); kill -TERM $(/bin/cat /run/udhcpc.%iface%.pid); fi \
elsif (execable("/sbin/udhcpc"))
@@ -432,7 +432,7 @@ method dhcp
up
[[Warning: Option hwaddress: %hwaddress% not yet supported]]
- /sbin/dhclient -v -pf /run/dhclient.%iface///.%.pid -lf /var/lib/dhcp/dhclient.%iface///.%.leases -I -df /var/lib/dhcp/dhclient6.%iface///.%.leases %iface% \
+ /sbin/dhclient -4 -v -pf /run/dhclient.%iface///.%.pid -lf /var/lib/dhcp/dhclient.%iface///.%.leases -I -df /var/lib/dhcp/dhclient6.%iface///.%.leases %iface% \
if (execable("/sbin/dhclient"))
/sbin/udhcpc -n -p /run/udhcpc.%iface///.%.pid -i %iface% [[-H %hostname%]] \
[[-c %client%]] \
@@ -444,7 +444,7 @@ method dhcp
elsif (1)
down
- /sbin/dhclient -v -r -pf /run/dhclient.%iface///.%.pid -lf /var/lib/dhcp/dhclient.%iface///.%.leases -I -df /var/lib/dhcp/dhclient6.%iface///.%.leases %iface% \
+ /sbin/dhclient -4 -v -r -pf /run/dhclient.%iface///.%.pid -lf /var/lib/dhcp/dhclient.%iface///.%.leases -I -df /var/lib/dhcp/dhclient6.%iface///.%.leases %iface% \
if (execable("/sbin/dhclient"))
if test -f /run/udhcpc.%iface///.%.pid; then kill -USR2 $(/bin/cat /run/udhcpc.%iface///.%.pid); kill -TERM $(/bin/cat /run/udhcpc.%iface///.%.pid); fi \
elsif (execable("/sbin/udhcpc"))
--
2.10.2
