Mikrotik L2tp Server Setup Full !!top!! Review

Setting up an L2TP (Layer 2 Tunneling Protocol) server on MikroTik remains one of the most reliable ways to provide secure remote access to a local network. When combined with IPsec, it offers a robust balance of security and compatibility across Windows, macOS, Android, and iOS.

This guide provides a comprehensive, step-by-step walkthrough to configuring a MikroTik L2TP/IPsec server from scratch. 1. Create an IP Pool

First, define the range of IP addresses that will be assigned to your remote VPN clients. Navigate to IP > Pool. Click the + (Add) button. Name: vpn-pool

Addresses: 192.168.89.10-192.168.89.50 (Ensure this range does not overlap with your local DHCP pool). 2. Configure the PPP Profile

The profile defines the "rules" for the connection, such as encryption and the gateway address. Go to PPP > Profiles. Click + to create a new profile. Name: l2tp-profile

Local Address: 192.168.89.1 (This will be the MikroTik’s IP within the tunnel). Remote Address: vpn-pool (The pool created in step 1). DNS Server: 8.8.8.8 or your local router IP.

Under the Protocols tab, ensure Use Encryption is set to yes. 3. Create VPN Users (Secrets) Each user needs a unique username and password to connect. In the PPP window, go to the Secrets tab. Click +. Name: user1 Password: StrongPassword123 Service: l2tp Profile: l2tp-profile 4. Enable the L2TP Server Now, activate the server and enforce IPsec for security. In the PPP window, go to the Interface tab. Click the L2TP Server button. Check Enabled. Default Profile: l2tp-profile.

Use IPsec: required (This ensures the connection is encrypted).

IPsec Secret: YourSharedKey (This is a pre-shared key you will enter on your client devices). 5. Configure Firewall Rules mikrotik l2tp server setup full

For the VPN to work, you must allow the specific L2TP and IPsec traffic through the MikroTik firewall.

Go to IP > Firewall > Filter Rules and add the following (move them to the top of the list): UDP 500 (IPsec IKE) UDP 4500 (IPsec NAT-T) UDP 1701 (L2TP) Protocol 50 (IPsec ESP) CLI Shortcut:

/ip firewall filter add action=accept chain=input dst-port=500,1701,4500 protocol=udp comment="Allow L2TP/IPsec" add action=accept chain=input protocol=ipsec-esp comment="Allow IPsec ESP" Use code with caution. 6. Enable Proxy ARP (Optional but Recommended)

If you want your VPN clients to communicate with other devices on your local LAN (e.g., 192.168.88.x), you must enable Proxy ARP on your bridge or local interface. Go to Interfaces. Open your Bridge (usually named bridge). Set ARP to proxy-arp. 7. Connecting from a Client (Windows Example) To connect your PC to the new server: Go to VPN Settings > Add a VPN Connection. VPN Provider: Windows (built-in). VPN Type: L2TP/IPsec with pre-shared key. Pre-shared key: Enter the secret from Step 4. Username/Password: Enter the credentials from Step 3.

💡 Pro Tip: If your MikroTik is behind a NAT (another router), you may need to add a registry key on Windows (AssumeUDPEncapsulationContextOnSendRule) to allow L2TP/IPsec connections. Summary Checklist IP Pool created. PPP Profile configured with encryption. User secrets added. L2TP Server enabled with IPsec Required. Firewall ports (500, 4500, 1701) opened. Proxy ARP enabled on the local bridge.

If you'd like to troubleshoot a connection issue or need the CLI commands for a specific version of RouterOS,

Setting up a MikroTik L2TP (Layer 2 Tunneling Protocol) server involves several critical stages, from IP management to security protocols. For a secure and functional setup, always pair L2TP with IPsec. 1. Define Client IP Pool

Create a range of IP addresses to be assigned to remote clients. Setting up an L2TP (Layer 2 Tunneling Protocol)

Winbox: Go to IP > Pool. Add a new pool (e.g., vpn-pool) and define the range (e.g., 192.168.89.10-192.168.89.50).

CLI: /ip pool add name=vpn-pool ranges=192.168.89.10-192.168.89.50. 2. Configure PPP Profile

This profile defines the connection parameters for your VPN tunnel.

Settings: Assign a Local Address (your router's internal VPN gateway IP, e.g., 192.168.89.1) and set the Remote Address to your vpn-pool.

DNS: Add your preferred DNS servers (e.g., 8.8.8.8) to ensure clients can resolve web addresses.

Encryption: Use use-encryption=yes to ensure traffic is secured. 3. Create VPN Users (Secrets) Each user requires unique credentials to connect. Winbox: Go to PPP > Secrets.

Details: Enter a Name (username), Password, select Service: l2tp, and choose the Profile created in the previous step. 4. Enable L2TP Server with IPsec

Activating the server and adding IPsec is vital for security, as L2TP by itself is not encrypted. MikroTik L2TP VPN Setup - Cloud Brigade Windows 10/11


Windows 10/11

Full CLI Script (Copy-Paste Ready)

Here is a complete script to configure L2TP/IPsec from scratch. Replace IP ranges and secrets.

# Pool
/ip pool add name=l2tp-pool ranges=192.168.100.10-192.168.100.100

Complete Configuration Script (Copy-Paste Ready)

Here is a consolidated script. Replace YOUR_WAN_IP, MySuperSecretKey123, and john/securepassword123 accordingly.

/ip pool add name=vpn-pool ranges=192.168.100.2-192.168.100.254
/ppp profile add name=l2tp-profile local-address=192.168.100.1 remote-address=vpn-pool dns-server=8.8.8.8,1.1.1.1 use-encryption=required
/interface l2tp-server server set enabled=yes default-profile=l2tp-profile authentication=mschap2 max-mtu=1400 max-mru=1400
/ppp secret add name=john password=securepassword123 profile=l2tp-profile service=l2tp

/ip firewall filter add chain=input protocol=udp dst-port=500,1701,4500 action=accept comment="L2TP/IPsec" /ip firewall filter add chain=input protocol=ipsec-esp action=accept comment="ESP" /ip firewall filter add chain=input protocol=gre action=accept comment="GRE" /ip firewall filter add chain=forward src-address=192.168.100.0/24 action=accept comment="VPN Forward"

/ip firewall nat add chain=srcnat src-address=192.168.100.0/24 action=masquerade comment="VPN NAT"

/ip ipsec proposal add name=l2tp-proposal enc-algorithms=aes-256-cbc auth-algorithms=sha256 pfs-group=none lifetime=30m /ip ipsec peer add address=0.0.0.0/0 auth-method=pre-shared-key secret=MySuperSecretKey123 enc-algorithm=aes-256 hash-algorithm=sha256 exchange-mode=main-l2tp /ip ipsec policy add src-address=0.0.0.0/0 dst-address=0.0.0.0/0 sa-src-address=YOUR_WAN_IP sa-dst-address=0.0.0.0/0 protocol=udp proposal=l2tp-proposal template=yes


L2TP Server

/interface l2tp-server server set enabled=yes use-ipsec=yes ipsec-secret=ChangeMePSK123 default-profile=default-l2tp-profile

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Date: May 31, 2024