VPN connections with juniper network connect have zero throughput

[yannek]

Starting with linux 3.19 the juniper network connect client establishes the VPN connection but has zero throughput on the virtual network adapter.

The log of the VPN client software show the following message:
adapter.warn IP Packet too small 0

The problem is known and fixed in 3.19.2 IIRC. The relevant patch is mentioned here:
https://bugzilla.kernel.org/show_bug.cgi?id=90901
in comment 2.

The fix is not part of 3.19.0-14-generic.

A backport of the patch would be great, a downgrade to linux 3.16 is a viable workaround for the time being.
---
ApportVersion: 2.17.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: yannek 1973 F.... pulseaudio
 /dev/snd/pcmC0D0c: yannek 1973 F...m pulseaudio
 /dev/snd/pcmC0D0p: yannek 1973 F...m pulseaudio
 /dev/snd/controlC0: yannek 1973 F.... pulseaudio
CurrentDesktop:

DistroRelease: Ubuntu 15.04
HibernationDevice: RESUME=UUID=3046eb61-13cf-4da5-995d-29640121be6d
InstallationDate: Installed on 2014-05-15 (334 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.

 vboxnet0 no wireless extensions.
MachineType: System manufacturer System Product Name
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-14-generic root=/dev/mapper/kubuntu--vg-root ro quiet splash
ProcVersionSignature: Ubuntu 3.19.0-14.14-generic 3.19.3
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-14-generic N/A
 linux-backports-modules-3.19.0-14-generic N/A
 linux-firmware 1.143
RfKill:

Tags: vivid
Uname: Linux 3.19.0-14-generic x86_64
UpgradeStatus: Upgraded to vivid on 2015-04-14 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/04/2010
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2A-VM ACPI BIOS Revision 5001
dmi.board.name: M2A-VM
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2A-VMACPIBIOSRevision5001:bd02/04/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2A-VM:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1444332

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[yannek (yannek-deactivatedaccount)]

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[sjert (gert-z)]

I have exactly the same problem using Aventail Connect VPN client.

[Giorgi Tepnadze (george-tepnadze)]

As workaround, Installed 4.0 kernel and VPN works, but a lot of other things not :(

[FZ (sirfz)]

Downgrading is an options as well (downgraded to 3.16 kernel and everything works for me).

[Joseph Salisbury (jsalisbury)]

This bug and bug 1448942 may be duplicates. I built a test kernel for bug 1448942 which has a cherry pick of commit 957f094

The test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1448942/

Can folks affected by this bug test this kernel and see if it resolves this bug?

Note you will need to install both the linux-image and linux-image-extra .deb packages.

[FZ (sirfz)]

Just tried the above kernel on my laptop, unfortunately wifi isn't working on my laptop with this kernel so I couldn't test VPN. Will try it tomorrow on my desktop.

[FZ (sirfz)]

Yes, Juniper nc works with Joseph's patched kernel.

[Gerry (gsker)]

Joseph,

That kernel fixes it for me also. (and I did see that same error in my log so it's the same symptom)