L2TP/IPsec Remote Access VPN Configuration Example

Configuration guides, troubleshooting and practical advice for AZTCOFW.

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Client Setup

When configuring clients, there are a few points to look for: Ensure that the client operating system configuration is set to connect to the proper external address for the VPN. It may be necessary to force the VPN type

DNS Configuration

If DNS servers are supplied to the clients and the Unbound DNS Resolver is used, then the subnet chosen for the L2TP clients must be added to its access list. Navigate to Services > DNS Resolver , Access Lists tab Click

IPsec Firewall Rules

Firewall rules are necessary to pass traffic from the client host over IPsec to establish the L2TP tunnel, and inside L2TP to pass the actual tunneled VPN traffic to systems across the VPN. Adding the L2TP rules was cove

Setup IPsec

These settings have been tested and found to work with some clients, but other similar settings may function as well. Feel free to try other encryption algorithms, hashes, etc. Mobile Clients Tab Navigate to VPN > IPsec