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[Q] L2TP VPN connection always fails

63 posts
Thanks Meter: 5
By CoolRaoul, Member on 2nd September 2014, 08:45 AM
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I unable to connect to my home NAS VPN server using built-in L2TP/IPSec profile: It stays in "connecting" state for many seconds then switch back to "disconnected".

I thought it was an incompatibility between my NAS VPN stack and Android built-in client.

But yesterday I had the opportunity to make a test using a Samsung Galaxy S3 "Mini" (using same profile and settings) and it worked!

And today, I tried with two colleagues devices: a LG G3 and a Samsung Galaxy S4, both running same android version (4.4.2) as the Z, and using same mobile operator and mobile plan.

They are connecting fine too!

Would anyone have an explanation of what's happening here?
Last edited by CoolRaoul; 3rd September 2014 at 09:19 PM. Reason: fix facts description
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3rd September 2014, 09:20 PM |#2  
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Something which could be interesting:

A member of another forum has been able to connect succesfully with an Xperia Z1 which was still using 4.3 firmware.

Just after that he has updated his phone to latest availlable firmware (4.4.4) and has been unable to connect then.
4th September 2014, 08:13 AM |#3  
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My tests results so far:
test results matrix
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14th September 2014, 05:42 PM |#4  
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No surprise: bug still present after latest updated
Last edited by CoolRaoul; 23rd December 2014 at 12:20 PM.
23rd December 2014, 12:20 PM |#5  
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Since my last post, I've been able to perform new others tests on different devices.

My conclusion is that is a Sony specific issue since it fails on every "Z" model I've tried so far (including latest Z3) running Android 4.4.*

Contacted Sony support which did'nt even respond to my queries.

Solution found: replace phone with a model of another brand (scheduled to be delivered soon )
29th June 2015, 10:05 PM |#6  
DcR-Nl's Avatar
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Thumbs up
Finally some good progress on this issue. Sony has acknowledged the issue and will try to fix it in a future release.
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30th June 2015, 08:18 AM |#7  
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I don't have my Z anymore but I will share this information.
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ipsec, l2tp, vpn
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