bugKVpnc - Bugs: bug #13351, Route is lost when KVPNC is started

 
 
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bug #13351: Route is lost when KVPNC is started

Submitted by:  Olaf Lenz <olenz>
Submitted on:  Wed 08 Apr 2009 07:10:44 AM UTC  
 
Category: NoneSeverity: 3 - Normal
Priority: 5 - NormalStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

Wed 20 Oct 2010 04:08:10 PM UTC, comment #5:

I also confirm this bug in 0.9.6, under ubuntu 10.04 kernel 2.6.32-25 64-bit.

Oddly, the default route disappears when kvpnc starts, before I try to connect to the VPN. Reconnecting to the wireless connection fixes the route, and then I can connect. Also odd, I have this problem on one wireless network, but not another.

The bug is reliably reproducible (on the one network) by cold-booting the machine and then starting kvpnc. It loses the default route the moment kvpnc starts running. If I connect to the vpn, then disconnect and quit kvpnc, then restart kvpnc, the default route disappears again. Disconnecting the wireless connection then reconnecting fixes the route, then kvpnc can start the vpn connection.

Michael Krebs <earthman>
Sat 14 Aug 2010 10:05:23 PM UTC, comment #4:

I can confirm this bug on version 0.9.6

Yevgeny <phaoost>
Thu 16 Apr 2009 07:01:51 AM UTC, comment #3:

Ok, so maybe it is not a void bug, after all. Today, it turned up again.

This is the output of "route" before starting kvpnc:

> route

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
194.95.63.128 * 255.255.255.128 U 2 0 0 wlan0
link-local * 255.255.0.0 U 1000 0 0 wlan0
default rpoly.mpip-main 0.0.0.0 UG 0 0 0 wlan0

And this is how it looks afterwards:

> route

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
194.95.63.128 * 255.255.255.128 U 2 0 0 wlan0
link-local * 255.255.0.0 U 1000 0 0 wlan0

So it seems to have lost its default route.

Note, that this only happens when I start kvpnc and the network is already connected. When kvpnc is running and I connect the network, then everything works fine.
So it seems to be happening during the actual setup of kvpnc (maybe the "preserving network environment" step seen in the log?).

Olaf Lenz <olenz>
Tue 14 Apr 2009 09:00:12 AM UTC, comment #2:

Since I have filed the report last week, I am unable to reproduce the problem, so I consider it solved. Don't ask me what happened.

The bug can be closed, I guess.

Olaf Lenz <olenz>
Wed 08 Apr 2009 07:49:58 AM UTC, comment #1:

The worst thing is, that now, after filing this report, I seem to be completely unable to reproduce the behaviour that has bugged me for months.
I wanted to give you more details, but at the moment, I'm unable to.

Olaf Lenz <olenz>
Wed 08 Apr 2009 07:10:44 AM UTC, original submission:

I'm using a recent SVN version of Kvpnc on Kubuntu Jaunty (9.04beta), but I have seen this behaviour already in earlier versions of the OS and of Kvpnc.

Often, when I start Kvpnc, the network connection (i.e. the route) is lost. To be able to use the network, I have to reconnect. Afterwards, everything (including kvpnc) works fine.

The problem is independent of whether I use a wlan or ethernet connection.

The behaviour is not 100% reproducible - usually, when I open kvpnc for the first time in a session, the route is lost and I have to reconnect. However, when I try to reproduce the behaviour by shutting down kvpnc and starting it again, the route is lost only occasionally. And if it is not lost, I can repeat shutting down and restarting kvpnc without any problem.

Olaf Lenz <olenz>

 

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  • -unavailable- added by earthman (Posted a comment)
  • -unavailable- added by phaoost (Posted a comment)
  • -unavailable- added by olenz (Submitted the item)
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