Hi, I got a problem that my windows 11 could not work properly when connected to my hardware VPN router. Windows 11 could not access internal network's service via PPTP or L2TP, I tried sth as followed: trace route by "tracert" command worked fine, fisrt destination is the virtual IP assigned to win11, next and the final destination is the target server I traced (2 jump) I setup a UDP service on my server behind VPN, win11 can visit this service by udp client , seems UDP protocol worked fine. I can ping my internal server , ICMP seems worked fine I can not visit any TCP based service, like FTP, remote desktop, HTTP portal. windows 11 can temporary visit TCP service behind VPN if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again. With same connection account I tried Win 10, Win server 2019, MacOS, all of them worked fine except my win 11 mentioned above. OS ver: windows11 21H2 22000.708 VPN server: TPLINK TL-R476G Any solution or suggestion is highly appreciated.

I also have this issue . After upgrading from windows 10 to windows 11 - when I'm trying to using VPN - I got ERR_ADDRESS_UNREACHABLE in all websites(including public websites)..the strange this is : if I am refreshing the page many times - the website can suddenly works (public & private sites) but only to the specific page -if I'm trying to navigate or click buttons and etc. - the ERR_ADDRESS_UNREACHABLE page returns. When I'm disconnecting the VPN connection - my internet back to normal functionality. (I tried Chrome & Edge & Firefox & Firefox portable - all browsers were with the same behavior ). I also reset all networks preferences ( windows settings -> network settings -> advanced -> reset my networks) -multiple times & flush my DNS cache & ipconfig /renew + release commands in the CMD & clear browser data & DNS/proxy cache and installed windows updates & Dell updates (My laptop is Dell latitude 5420 with windows 11) I replaced my internet provider & replaced my router as well - I upgraded to fiber optics but it didn't changed anything. The strangest thing - that if I open an access point (hot-spot)) from my mobile device (Oneplus 6) and connect to it, and then connect to a VPN - everything works great! No errors or messages about ERR_ADDRESS_UNREACHABLE - so these are not VPN configuration issues or browser issues. I tried using the internet of my neighbors that they use a completely different provider and also the problem repeated itself. I'm taking on l2tp/IPsec with pre-shared key VPN. please help me to solve this strange issue. I don't want to rollback to windows 10. thanks a lot!!

OMG. I've got exactly the same issues. I've been spening weeks with Firewall, DC, SMB etc. Tried everything on internet to fix this. L2TPIPSec via Fortigate. PPTP via RRAS L2TP via RRAS => It works if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again. Joey, Bangkok Thailand.

OMG. I've got exactly the same issues. I've been spending weeks with Firewall, DC, SMB etc to workaround this problem. Tried everything on internet to fix this. L2TPIPSec via Fortigate. PPTP via RRAS L2TP via RRAS => It works if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again. Joey, Bangkok Thailand.

Same issue here, all of our fleet of Windows 11 Notebooks have this same issue after some minutes ping (ICMP) works but, no TCP traffic is working. I have been playing around disabling Intel services, ExpressConnect and Dell Services such as Dell Optimizer with perhaps some success but, this could be a coincidence as the Windows 11 users still complain of connection issues regularly so, it could be just changing the order of things making it seem like its doing something. None of our Windows 10 Notebooks have any issues at all. Microsoft, please investigate this ASAP. it makes windows 11 completely USELESS in the enterprise space.

Windows 11 can not work properly via PPTP/L2TP VPN connection

duo jin 1

Hi,

I got a problem that my windows 11 could not work properly when connected to my hardware VPN router.

Windows 11 could not access internal network's service via PPTP or L2TP, I tried sth as followed:

trace route by "tracert" command worked fine, fisrt destination is the virtual IP assigned to win11, next and the final destination is the target server I traced (2 jump)
I setup a UDP service on my server behind VPN, win11 can visit this service by udp client , seems UDP protocol worked fine.
I can ping my internal server , ICMP seems worked fine
I can not visit any TCP based service, like FTP, remote desktop, HTTP portal.
windows 11 can temporary visit TCP service behind VPN if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again.

With same connection account I tried Win 10, Win server 2019, MacOS, all of them worked fine except my win 11 mentioned above.

OS ver: windows11 21H2 22000.708
VPN server: TPLINK TL-R476G

Any solution or suggestion is highly appreciated.

Reza-Ameri 16,831 Reputation points

2022-06-03T16:07:44.25+00:00

Have you check the log files in the VPN server and in Windows?
Have you tried updating your Network Driver?
Mathew Orchard 21 Reputation points

2022-08-11T14:29:32.873+00:00

Our team are also experiencing this exact issue.

VPN's over PP2P connect but that's it .
SumCompGuys 0 Reputation points

2023-04-25T19:59:08.5+00:00

Try this, go to Network and Internet, advanced network setting, more network adopter options, Right click the VPN you are having issue with and select Properties, go to Security, make sure "Microsoft CHAP Version 2 (MS-CHAP v2) is enabled. Not saying this is your issue, and you may already know about this settings. I fought a similar issue and this was my fix. My Client VPN is a UDM SE and once I did this setting everything worked. Hope this helps, good luck.

14 answers

Nof Hasson 1 Reputation point

2022-07-13T11:57:06.517+00:00

I also have this issue . After upgrading from windows 10 to windows 11 - when I'm trying to using VPN - I got ERR_ADDRESS_UNREACHABLE in all websites(including public websites)..the strange this is : if I am refreshing the page many times - the website can suddenly works (public & private sites) but only to the specific page -if I'm trying to navigate or click buttons and etc. - the ERR_ADDRESS_UNREACHABLE page returns.
When I'm disconnecting the VPN connection - my internet back to normal functionality. (I tried Chrome & Edge & Firefox & Firefox portable - all browsers were with the same behavior ).
I also reset all networks preferences ( windows settings -> network settings -> advanced -> reset my networks) -multiple times & flush my DNS cache & ipconfig /renew + release commands in the CMD & clear browser data & DNS/proxy cache and installed windows updates & Dell updates (My laptop is Dell latitude 5420 with windows 11)
I replaced my internet provider & replaced my router as well - I upgraded to fiber optics but it didn't changed anything.
The strangest thing - that if I open an access point (hot-spot)) from my mobile device (Oneplus 6) and connect to it, and then connect to a VPN - everything works great! No errors or messages about ERR_ADDRESS_UNREACHABLE - so these are not VPN configuration issues or browser issues. I tried using the internet of my neighbors that they use a completely different provider and also the problem repeated itself.
I'm taking on l2tp/IPsec with pre-shared key VPN. please help me to solve this strange issue. I don't want to rollback to windows 10. thanks a lot!!
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Nof Hasson 1 Reputation point

2022-07-13T11:59:20.937+00:00
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Joey 21 Reputation points

2022-07-23T11:56:03.1+00:00

OMG. I've got exactly the same issues. I've been spening weeks with Firewall, DC, SMB etc.

Tried everything on internet to fix this.

L2TPIPSec via Fortigate.
PPTP via RRAS
L2TP via RRAS

=> It works if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again.

Joey, Bangkok Thailand.
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Joey 21 Reputation points

2022-07-23T11:56:03.837+00:00

OMG. I've got exactly the same issues. I've been spending weeks with Firewall, DC, SMB etc to workaround this problem.

Tried everything on internet to fix this.

L2TPIPSec via Fortigate.
PPTP via RRAS
L2TP via RRAS

=> It works if I connect to my VPN account right after a reboot, after 3-5 min, it can not visit any TCP service again.

Joey, Bangkok Thailand.
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Phani Deepak Kalluri 6 Reputation points

2022-07-24T08:56:02.647+00:00

Same behaviour on my Windows 11 Pro as well. Very frustrating..
DNS does resolve ok. Initially couldn't reach any websites, but after today's Windows updates, can access internet while connected to the VPN.
Pings the RDP server and other devices on the remote network, but not RDP connection or https, to the server through L2TP VPN.
Can't find any fix so far, thinking of downgrading this laptop to Windows 10 as none of the Windows 10 clients have any of these issues.

Joey 21 Reputation points

2022-07-25T08:39:10.317+00:00

The issue still exists in Windows 11 22H2 release preview build 22622.436 (the latest build).

Just submitted feedback to microsoft.

Joey.
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AJ 1 Reputation point

2022-08-04T02:51:47.047+00:00

Same issue here, all of our fleet of Windows 11 Notebooks have this same issue after some minutes ping (ICMP) works but, no TCP traffic is working. I have been playing around disabling Intel services, ExpressConnect and Dell Services such as Dell Optimizer with perhaps some success but, this could be a coincidence as the Windows 11 users still complain of connection issues regularly so, it could be just changing the order of things making it seem like its doing something.

None of our Windows 10 Notebooks have any issues at all.

Microsoft, please investigate this ASAP. it makes windows 11 completely USELESS in the enterprise space.
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