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(I'm not able to use ubuntu-bug as it fails with a 503 error trying to
connect to the crash server)
I'm using Ubuntu 18.04.1 on 64bit Intel with:
network-manager 1.10.6-2ubuntu1
network-manager-fortisslvpn 1.2.8-1build1
network-manager-fortisslvpn-gnome 1.2.8-1build1
network-manager-gnome 1.8.10-2ubuntu1
systemd 237-3ubuntu10.3
When I connect then disconnect from my VPN using the network-manager-
fortisslvpn VPN interface, it will break the permissions on
/run/systemd/resolv/stub-resolv.conf such that I can't use DNS anymore
until I fix the permissions.
On my system I see:
$ ls -al /etc/resolv.conf
lrwxrwxrwx 1 root root 39 Oct 22 2017 /etc/resolv.conf ->
../run/systemd/resolve/stub-resolv.conf
When there's no VPN connection, I see:
$ ls -al /run/systemd/resolve/
total 8
drwxr-xr-x 3 systemd-resolve systemd-resolve 100 Sep 19 23:05 ./
drwxr-xr-x 21 root root 480 Sep 15 14:19 ../
drwx------ 2 systemd-resolve systemd-resolve 60 Sep 19 23:05 netif/
-rw-r--r-- 1 systemd-resolve systemd-resolve 714 Sep 19 23:05 resolv.conf
-rw-r--r-- 1 systemd-resolve systemd-resolve 783 Sep 19 19:31 stub-resolv.conf
Now I start the fortisslvpn VPN:
$ ls -al /run/systemd/resolve/
total 16
drwxr-xr-x 3 systemd-resolve systemd-resolve 140 Sep 19 23:06 ./
drwxr-xr-x 21 root root 480 Sep 15 14:19 ../
drwx------ 2 systemd-resolve systemd-resolve 80 Sep 19 23:06 netif/
-rw-r--r-- 1 systemd-resolve systemd-resolve 714 Sep 19 23:06 resolv.conf
-rw-r--r-- 1 systemd-resolve systemd-resolve 783 Sep 19 23:06 stub-resolv.conf
-rw------- 1 root root 783 Sep 19 19:31
stub-resolv.conf.pppd-backup.ppp0
-rw-r--r-- 1 root root 805 Sep 19 23:06
stub-resolv.conf.tmp
Note how the stub-resolv.conf.pppd-backup-ppp0 has 0600 file
permissions.
Now I stop the fortisslvpn VPN:
$ ls -al /run/systemd/resolve/
total 12
drwxr-xr-x 3 systemd-resolve systemd-resolve 120 Sep 19 23:06 ./
drwxr-xr-x 21 root root 480 Sep 15 14:19 ../
drwx------ 2 systemd-resolve systemd-resolve 60 Sep 19 23:06 netif/
-rw-r--r-- 1 systemd-resolve systemd-resolve 714 Sep 19 23:06 resolv.conf
-rw------- 1 root root 783 Sep 19 19:31 stub-resolv.conf
-rw-r--r-- 1 root root 805 Sep 19 23:06
stub-resolv.conf.tmp
Now the stub-resolv.conf file hs 0600 permissions and my DNS is broken.
** Affects: network-manager-pptp (Ubuntu)
Importance: Undecided
Status: New
** Affects: network-manager-fortisslvpn (Ubuntu)
Importance: Undecided
Status: Confirmed
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network-manager-fortisslvpn breaks mode of /run/systemd/resolv/stub-resolv.conf
https://bugs.launchpad.net/bugs/1793427
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