Can this work on Windows/Android/iPhone at same time about setup-ipsec-vpn

[hwdsl2]

@sudanking What error(s) did you see? In case it is Error 628, go to the "Security" tab [1] of VPN connection properties, enable CHAP and disable MS-CHAP v2.

Also, please note that due to a limitation of the IPsec protocol, multiple devices behind the same NAT (e.g. a home router) cannot simultaneously connect to the same IPsec VPN server.

[1] #7 (comment)
[2] #9

[sudanking]

this what I get in event viewer:
The user XXXXXXXX dialed a connection named XXXXXXX which has failed. The error code returned on failure is 809.

I use single connection from one place to server.

[hwdsl2]

@sudanking As explained in important notes [1], to avoid Error 809 please add the following registry key and reboot your Windows 10 computer [2].

• Client behind NAT devices
  Solution: Modern Windows devices do not support L2TP/IPsec connections when the Windows computer or VPN server are located behind a NAT. If the Windows VPN client fails with Error 809 when trying to establish a VPN connection to an MX located behind a NAT, add the "AssumeUDPEncapsulationContextOnSendRule" DWORD value to the Windows registry. This DWORD value allows Windows to establish security associations when both the VPN server and the Windows based VPN client computer are behind NAT devices.

For Windows Vista, 7, 8, 10, and 2008 Server:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent

RegValue: AssumeUDPEncapsulationContextOnSendRule

Type: DWORD

Data Value: 2

Note that after creating this key you will need to reboot the machine.

In case that you also see Error 628, refer to my previous comment.

[1] https://github.com/hwdsl2/setup-ipsec-vpn#important-notes
[2] https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809

[hwdsl2]

@sudanking Closing this issue for now. Please follow instructions in my earlier comment. Feel free to reply if the problem persists.