Cannot connect to L2TP VPN from inside the LAN
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Cannot connect to L2TP VPN from inside the LAN
Region : UnitedStates
Model : TL-ER6120
Hardware Version : V1
Firmware Version :
ISP :
I've got a new network implementation in which I have all wireless LAN communications on a separate VLAN and subnet. That all is working great, but there are instances where we would like to allow some wireless clients to access the primary VLAN. I intended to do this by connecting the clients to the L2TP VPN that is already in place for external employees, however all attempts to connect to the L2TP tunnel from inside the LAN fail.
This fails for clients on either VLAN
[*]PPTP works inside the LAN, but I don't want PPTP active on this router
[*]Credentials and shared keys are correct
[*]L2TP connections from the WAN work great.
[*]Failure seems to be on the encryption negotiation and returns Windows error 789.
[*]We have tested the same laptop from both inside and outside the LAN. The laptop connects fine from outside the network over WAN. Inside the network it fails, even when changing the IP Address to the LAN IP of the router.
[*]I am using the simplest IPSEC L2TP tunnel as defined in the TP-Link documentation and am not using IKE or detailed IPSEC policies.
The router in question is a TP-Link ER6020. I am trying to first solve this issue first within the primary VLAN and am not even involving the secondary VLAN yet so that really isn't a factor. I suspect that this might be a NAT problem of some kind but I am not sure.
Model : TL-ER6120
Hardware Version : V1
Firmware Version :
ISP :
I've got a new network implementation in which I have all wireless LAN communications on a separate VLAN and subnet. That all is working great, but there are instances where we would like to allow some wireless clients to access the primary VLAN. I intended to do this by connecting the clients to the L2TP VPN that is already in place for external employees, however all attempts to connect to the L2TP tunnel from inside the LAN fail.
This fails for clients on either VLAN
[*]PPTP works inside the LAN, but I don't want PPTP active on this router
[*]Credentials and shared keys are correct
[*]L2TP connections from the WAN work great.
[*]Failure seems to be on the encryption negotiation and returns Windows error 789.
[*]We have tested the same laptop from both inside and outside the LAN. The laptop connects fine from outside the network over WAN. Inside the network it fails, even when changing the IP Address to the LAN IP of the router.
[*]I am using the simplest IPSEC L2TP tunnel as defined in the TP-Link documentation and am not using IKE or detailed IPSEC policies.
The router in question is a TP-Link ER6020. I am trying to first solve this issue first within the primary VLAN and am not even involving the secondary VLAN yet so that really isn't a factor. I suspect that this might be a NAT problem of some kind but I am not sure.
