Ensure encryption algorithms include aes-256 cbc and sha256 . : modp2048 or stronger. Click Apply and OK . Step 4: Enable L2TP Server with IPsec Now, configure the actual L2TP server interface. Go to PPP -> Interface . Click L2TP Server . Enabled : Checked. Default Profile : l2tp-profile . Use IPsec : Select yes .
Ensure this range does not overlap with your existing DHCP server pool.
When remote users connect to the L2TP server, they need a unique IP address assigned to their virtual interface. We must dedicate a specific range of IP addresses for these clients to prevent conflicts with the local LAN. Via WinBox: Navigate to -> Pool . Click the + (Add) button. Set Name to l2tp-vpn-pool . Set Addresses to 192.168.89.10-192.168.89.50 . Click Apply and OK . Via Command Line (CLI): mikrotik l2tp server setup full
If you encounter issues with your L2TP server, check the following:
/ip services add name=l2tp protocol=l2tp Ensure encryption algorithms include aes-256 cbc and sha256
: (Optional) Set your router's IP or a public DNS like 8.8.8.8 . Click Apply and OK . Step 3: Configure IPsec Proposal For security, we will use IPsec to encrypt the L2TP tunnel. Go to IP -> IPsec -> Proposals . Click + (Add) . Name : l2tp-proposal
Chain: input , Protocol: udp , Dst. Port: 1701 , Action: accept Step 4: Enable L2TP Server with IPsec Now,
L2TP alone does not provide encryption. For a secure "L2TP/IPsec" setup, you must configure the IPsec layer. : Define modern encryption standards. IP > IPsec > Profiles > + Hash Algorithms : sha256 Encryption Algorithms : aes-256 DH Group : modp2048 . IPsec Proposal : IP > IPsec > Proposals > + (or edit default ).
Fix : Check the PPP profile settings. Ensure a valid DNS server is assigned under the PPP Profile configurations, or check the client configuration to ensure "Use default gateway on remote network" is enabled if you wish to route all traffic through the VPN.
You must first define a range of IP addresses that will be assigned to remote clients upon connection. : IP -> Pool Name : vpn_pool Address Range : e.g., 192.168.89.2-192.168.89.50 2. Create a PPP Profile