Windows 10: Windows 10 1909 VPN connectivity issues

Hello all,


Having an issue that I troubleshooted down to Windows 10 specifically.

A client of mine is having issues connecting two machines to a synology VPN server, there are 6 other machines that are able to connect to the VPN service without any issues.

The two machines in question rarely are able to connect, if they do connect, they work fine with no network performance loss. Around 85% of the time, windows 10 comes back saying unable to connect.


Now for the really strange part, lets say if laptop 1 was able to get connected,laptop 2 is now able to connect to the VPN.

If laptop 1 is unable to connect to the VPN, laptop 2 will unable to connect to the vpn no matter what happens.

Not sure how that is possible, but this has been confirmed by both the client and myself, and tested thoroughly.



Some extra information:


VPN is L2TP with Preshared key,

I have done all obvious troubleshooting steps, the VPN settings are confirmed accurate with the machines, as sometimes they are able to hop on the VPN.

Registry editor fix has been applied for L2TP connections. See this Link on the regdit fix

Firewall has been completely turned off.

The business network that the Synology NAS is behind has all necessary ports opened and configured correctly to allow flow of information.


This is seeming like a pretty ugly little bug with the new Win10 update.

If anyone has any ideas on how or why this is happening, please feel free to share!


Thanks,


-Frosty

:)

 

No Internet Connection When VPN Is Connected

This particular issue has been going on for almost a month now. My companies IT department is still trying to figure out the root cause. Below is a list of isolation / troubleshooting i've done.

Issue: Once connected to the work VPN (successfully) the internet connection on the Windows 10 machine disconnects and does not allow any network traffic.

OS: Windows 10 Home - Version: 1909 (OS Build 18363.476)

Computer: Razor Blade 2019

- Latest drivers installed

- Latest Windows updates installed

- System Wide issue

Troubleshooting / Isolation

• Cellular Data: Verified the Windows machine can connect to a hotspot and successfully browse the internet. (No VPN involved)

• Cellular Data + Work VPN: Verified the Windows machine can connect to the hotspot & successfully connect to work VPN and successfully browse the internet.

• Home WiFi: Verified Windows machine can connect to the home wifi network and successfully browse the internet (No VPN involved)

• Home WiFi + Work VPN: Verified Windows machine can connect to home WiFi. It can successfully connect to work VPN. However once the work VPN is connected, the home WiFi network indicates (No Internet Access)

• Ping Test + Work VPN: Verified I can successfully ping (work) websites and even the work VPN URL successfully without any packet loss. However once I go to ping (non-work) related addresses like google.com, apple.com etc. there is packet loss.
  

At this point I decided to test my work VPN on my iPhone & Apple Mac.

• iPhone: Home WiFi + Work VPN: Verified the iPhone successfully connects to home WiFi network and the work VPN and can successfully browse the internet.

• Mac: Home WiFi + Work VPN: Verified the Mac successfully connects to home WiFi network and the work VPN and can successfully browse the internet.

Isolated: Only the Windows machine seems to be affected. I even verified this issue occurs on multiple Windows user accounts on the Windows 10 machine.

- Windows 10 is fully updated to the latest November Windows 10 update and issue persists

- Deleted and Added the VPN configuration several times and issue persisted.

Third Party VPN Client Test: Tested with Nord VPN and the Windows machine successfully connected to the home WiFi network & the Nord VPN connection successfully connected to a random server and successfully browsed the internet.

- Disabled IPV6 on VPN & WiFi network configuration (Per IT Support guidance) and issue persisted

*Currently updating to Windows 10 Insider Preview 19033.1 (vb_release) to see if this might fix anything pertaining to Windows 10 VPN.

Thanks for any additional guidance / suggestions / help that the community offers.

 

Vpn ( trusted Vpn)

Hi everyone.
I am not an expert about Vpn and that's why I would like to know if someone could list me a few trusted Vpns, I would really appreciate any suggestion/ advice.

Thanks.

 

Vpn ( trusted Vpn)

Tired of Germany blocking many youtube videos? *Big Grin