[Pkg-utopia-maintainers] Bug#693512: network-manager: Network manager does not remove default routes

[Miguel Angel]

Package: network-manager
Version: 0.9.4.0-6
Severity: normal

I have 2 connections in my computer:

eth0  : physical connectivity
wlan0 : wireless connectivity

I used to connect to my network through a physical connection but it is not in place anymore, so I decided to connect through wifi (wlan0). 
Network-manager is not removing the default routing I had before and every time I would like to connect I have to manually remove this route.
As far as I understand from the network-manager, this should be automatically done by network-manager (removing and adding default new routes depending on current network connection)

Here you have the example:

/* System has booted up*/

$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.2.1     0.0.0.0         UG        0 0          0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0

/* I connect to my wifi connection through network manager in KDE */

# netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.2.1     0.0.0.0         UG        0 0          0 wlan0
192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 wlan0

/* As you can see, eth0 configuration routing is still there!!)

# route del -net 192.168.2.0 netmask 255.255.255.0 eth0

/* After deleting the default route, it is working again)

# netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.2.1     0.0.0.0         UG        0 0          0 wlan0
192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 wlan0

/* Traffic is routed properly */

I have also modified NetworkManager configuration file to be able to manage the eth0 connection (according to http://wiki.debian.org/NetworkManager) with no success:

$ cat /etc/NetworkManager/NetworkManager.conf 
[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages network-manager depends on:
ii  adduser                3.113+nmu3
ii  dbus                   1.6.8-1
ii  dpkg                   1.16.9
ii  isc-dhcp-client        4.2.4-3
ii  libc6                  2.13-36
ii  libdbus-1-3            1.6.8-1
ii  libdbus-glib-1-2       0.100-1
ii  libgcrypt11            1.5.0-3
ii  libglib2.0-0           2.33.12+really2.32.4-3
ii  libgnutls26            2.12.20-2
ii  libgudev-1.0-0         175-7.1
ii  libnl-3-200            3.2.7-4
ii  libnl-genl-3-200       3.2.7-4
ii  libnl-route-3-200      3.2.7-4
ii  libnm-glib4            0.9.4.0-6
ii  libnm-util2            0.9.4.0-6
ii  libpolkit-gobject-1-0  0.105-1
ii  libuuid1               2.20.1-5.2
ii  lsb-base               4.1+Debian8
ii  udev                   175-7.1
ii  wpasupplicant          1.0-3+b2

Versions of packages network-manager recommends:
ii  crda          1.1.2-1
ii  dnsmasq-base  2.63-4
ii  iptables      1.4.16.3-4
ii  modemmanager  0.5.2.0-2
ii  policykit-1   0.105-1
ii  ppp           2.4.5-5.1+b1

Versions of packages network-manager suggests:
pn  avahi-autoipd  <none>

-- Configuration Files:
/etc/NetworkManager/NetworkManager.conf changed:
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=true


-- no debconf information