Bug 1529082

Summary: The VPN connection via L2TP/IPsec stopped working with the latest kernel 4.14
Product: [Fedora] Fedora Reporter: Giordano Battilana <jordan83>
Component: NetworkManager-l2tpAssignee: Douglas Kosovic <doug>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
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Version: 27CC: code, doug, drizt72
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Last Closed: 2017-12-26 11:17:39 UTC Type: Bug
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The NetworkManager output obtained from journalctl none

Description Giordano Battilana 2017-12-26 09:45:38 UTC
Created attachment 1372402 [details]
The NetworkManager output obtained from journalctl

Description of problem:
Fedora recently upgraded the kernel to version 4.14. I have a VPN L2TP/IPsec that stopped working after the upgrade. If I choose a kernel 4.13 it works

Version-Release number of selected component (if applicable):
The kernel (uname -a): 
Linux merlino 4.14.8-300.fc27.x86_64 #1 SMP Wed Dec 20 19:00:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

NetworkManager-l2tp.x86_64                 1.2.8-3.fc27                @fedora  
NetworkManager-l2tp-gnome.x86_64           1.2.8-3.fc27                @fedora  
xl2tpd.x86_64                              1.3.8-5.fc27                @fedora 

How reproducible:
It happens all the time with 4.14.x kernels

Additional info:
In attachment the output of journalctl -u NetworkManager --since today with the NetworkManager output with some personal info obfuscated.

Comment 1 Douglas Kosovic 2017-12-26 11:17:39 UTC
Keep an eye on this netdev linux kernel mailing list thread :

https://patchwork.ozlabs.org/patch/838470/

It has info on the kernel 4.14 commit that broke IPsec transport mode when a wildcard address is used on the client side like what NetworkManager-l2tp does.

*** This bug has been marked as a duplicate of bug 1526203 ***