Troubleshooting L2TP

Configuration guides, troubleshooting and practical advice for AZTCOFW.

Articles

4 results

Cannot connect

Check that firewall rules have been added to the external interface where the L2TP traffic enters the firewall. Also make sure the client is connecting to the interface IP address chosen on the L2TP settings.

Connected to L2TP but cannot pass traffic

Ensure firewall rules have been added to the L2TP VPN interface . Also ensure the remote subnet across the VPN is different from the local subnet. It is not possible to reach a 192.168.1.0/24 network across the VPN when

Connection Fails with a Windows Client

If the IPsec layer appears to complete, but no L2TP traffic passes, it is likely a known incompatibility between Win- dows and the strongSwan daemon used on AZTCO-FW. There is currently no known workaround except to move

L2TP Traffic Blocked Outbound

In some cases, such as when combined with IPsec, L2TP traffic may also require special handling via floating rules. This appears as blocked traffic in the outbound direction in the firewall logs, showing an L2TP server i