*** This bug is a duplicate of bug 1752411 ***
https://bugs.launchpad.net/bugs/1752411
** This bug has been marked a duplicate of bug 1752411
bind9-host, avahi-daemon-check-dns.sh hang forever causes network
connections to get stuck
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https://bugs.launchpad.net/bugs/1772692
Title:
vpnc hangs, if avahi-daemon installed
Status in avahi package in Ubuntu:
New
Status in bind9 package in Ubuntu:
New
Status in vpnc package in Ubuntu:
New
Bug description:
My vpnc configuration stopped working correctly after an upgrade from
16.04 to 18.04.
Symptoms are:
When starting vpnc with:
$ sudo vpnc-connect myconfig
vpnc hangs without a working vpn connection. Pressing Ctrl-C once,
will output the line
^CVPNC started in background (pid: 19352)...
and vpn suddenly works.
Hint: Pressing Ctrl-C twice is bad, as that exits vpnc without a working vpn
connection. And it changes the routing table and /etc/resolv.conf, so that
normal internet is also not working correctly. I found the Ctrl-C workaround
by accident.
Further examination revealed, that vpnc seems to hang inside the following
script:
/usr/lib/avahi/avahi-daemon-check-dns.sh
which comes with the avahi-daemon package.
I also discovered, that there is a 'host' process hanging. So, the above
script
seems to hang in line 76:
OUT=`LC_ALL=C host -t soa local. 2>&1`
'host' is part of the bind9-host package.
Currently, I simply deinstalled avahi-daemon. Luckily, I don't need that
package.
I'm not sure, which package is to blame for this bug, my candidates are (in
this
order):
bind9-host
avahi-daemon
vpnc
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