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TP-Link Archer C9 v3 will not allow L2TP VPN client passthrough

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TP-Link Archer C9 v3 will not allow L2TP VPN client passthrough

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
TP-Link Archer C9 v3 will not allow L2TP VPN client passthrough
TP-Link Archer C9 v3 will not allow L2TP VPN client passthrough
2019-11-11 17:05:55
Model: Archer C9  
Hardware Version: V3
Firmware Version: 1.3.1

I have a Archer C9 v3 with 4 computers connected. Two are wireless and the other two are ethernet. I need them to connect to a server using vpn and I have managed to troubleshoot that I can connect any of them but they cannot all be connected at the same time. So If I connect computer #1 then #2,3,4 will not connect. However, if I connect #2 it will work but then #1, 3 and 4 cannot connect. They are using the Windows 10 built in VPN client using L2TP w/PSK. On the router, I looked under NAT Forwarding > ALG > and everything has a check in the box but specifically the boxes for the following are checked:

 

  • Enable PPTP passthrough 
  • Enable L2TP passthrough
  • Enable IPsec passthrough

 

What can I do to allow all four computers to connect to the VPN?

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Re:TP-Link Archer C9 v3 will not allow L2TP VPN client passthrough
2019-11-11 18:12:44

@techdaddy 

 

What is the type of VPN connection your VPN clients are using? (PPTP, L2TP, OpenVPN)

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