Setting up your mikrotik as an openvpn client a step by step guide to configure mikrotik openvpn client on router and improve remote access
Yes, setting up your MikroTik as an OpenVPN client is straightforward with this step-by-step guide. In this post you’ll learn how to convert a standard VPN server setup into a reliable MikroTik OpenVPN client solution, including cert handling, client configuration, firewall rules, routing, and plenty of real-world tips. For extra security while you work through this guide, NordVPN can be a great companion for OpenVPN on MikroTik — check out the NordVPN option here: 
. If you prefer to explore general VPN resources first, see the unclickable references at the bottom of this introduction.
This guide is written with a YouTube-ready, walk-through style in mind: clear, actionable steps, real-world caveats, and practical checks you can perform as you go. By the end, you’ll have a functioning OpenVPN client on your MikroTik router, ready to route traffic through a secure tunnel while keeping local network devices accessible. Below you’ll find a compact overview of the topics we’ll cover, followed by a deeper dive with commands, screenshots you’d expect to see in a video, and troubleshooting tips.
Useful URLs and Resources unclickable text:
– OpenVPN official site – openvpn.net
– MikroTik RouterOS documentation – wiki.mikrotik.com
– MikroTik community forums – community.mikrotik.com
– NordVPN help center – nordvpn.com/help
– OpenVPN Community Forum – community.openvpn.net
Prerequisites and planning
Before you touch anything on the MikroTik, make sure you have the server side ready and the following details on hand:
- OpenVPN server address hostname or IP and port commonly 1194.
- Protocol used by the server UDP is typical for performance. TCP can be more reliable over flaky links.
- Server-side TLS settings: TLS-auth key ta.key if TLS authentication is enabled.
- CA certificate ca.crt, client certificate client.crt, and client key client.key if your server uses cert-based auth.
- A user account for the VPN that has permission to connect from the MikroTik client.
- A plan for traffic routing: decide which subnets should go through the VPN and which should stay local.
Why this matters: OpenVPN can work with a mix of certificate-based and username/password authentication. MikroTik supports OpenVPN client mode, but the exact fields you enter depend on your RouterOS version and whether you’re using certs or username/password. Having all server details ready saves you a lot of back-and-forth.
Understanding OpenVPN on MikroTik
OpenVPN on MikroTik is implemented as a client interface you configure to connect to an OpenVPN server. The client can run over UDP or TCP, and you can decide whether to set a default route through the VPN or only route specific traffic split tunneling. Performance depends on CPU power, MTU settings, and the chosen protocol. In many scenarios, UDP provides lower latency and higher throughput, but TCP is sometimes favored on networks that drop UDP packets frequently or require stable, steady performance.
Key concepts to keep in mind:
- Certificates vs. username/password: If your server uses certs, you’ll import CA, client cert, and client key into the MikroTik. If it uses username/password, you’ll enter credentials in the VPN client settings.
- TLS-auth ta.key: If enabled on the server, you should provide the TLS key on the MikroTik to prevent unauthorized connection attempts.
- DNS handling: Decide whether the VPN should also provide DNS DNS leaks are a common pitfall if you’re not careful.
Collecting certificates and server details
If you’re migrating from a plugin-based client like a Windows client to MikroTik, you’ll typically extract four items: How to generate openvpn ovpn files a step by step guide for creating client configs, certificates, and secure connections
- ca.crt: The Certificate Authority certificate used to validate the server.
- client.crt: The client certificate for mutual authentication if used.
- client.key: The corresponding private key for the client certificate.
- ta.key or tls-auth key: Optional TLS authentication key if the server is configured with tls-auth.
If your OpenVPN server uses a .ovpn profile, you can extract these components from the file:
- The CA certificate is usually embedded in the file or provided as a separate ca.crt.
- The client certificate and key are typically embedded or provided as separate client.crt and client.key.
- The tls-auth key appears as ta.key if TLS authentication is enabled.
Store these files in a safe place on your computer, and prepare to import them into MikroTik. The exact file-import steps will appear in the GUI or CLI sections below, but the overall idea is to ensure MikroTik has the exact cryptographic material the server expects.
Step-by-step: Setting up the OpenVPN client on MikroTik
Below is a practical, UI-friendly approach you can adapt to Winbox/WebFig or the RouterOS CLI. The steps are written to be video-friendly so you can follow along while you configure live.
- Create/Open a new OpenVPN client interface
- In RouterOS, go to Network or Interfaces, choose Add, then select OpenVPN Client ovpn-client.
- Name the interface something clear like ovpn-out1 or vpn_openvpn.
- Enter server details
- Connect Address: the server hostname or IP for example, vpn.yourserver.com or 203.0.113.10
- Port: 1194 or whatever your server uses
- Protocol: UDP preferred for performance or TCP if your network requires it
- Server CA: choose the imported CA certificate ca.crt
- Client Certificate: choose the client certificate client.crt if your server requires it
- Client Key: attach the client key client.key if needed
- TLS Auth: enable and provide ta.key if your server uses TLS authentication
- Cipher: AES-256-CBC or the cipher your server expects
- Auth: SHA256 for example
- Username/Password: leave blank unless your server uses static username/password
- Verify Server Certificate: yes recommended
- Routing and NAT
- Check “Add Default Route” if you want all traffic to go through the VPN.
- If you want only specific subnets to go through the VPN, leave default route off and set a static route for those subnets via the OpenVPN interface.
- DNS considerations
- If you want the VPN to provide DNS, add a DNS server in the MikroTik’s DNS settings or route the VPN’s DNS often 10.8.0.1 or similar through the tunnel. If you don’t, you’ll need to rely on your local DNS and set up DNS leak protections separately.
- Apply and test
- Apply the settings and wait a few seconds for the client to establish a tunnel. You should see the interface state change to “running” and an assigned IP in the VPN’s tunnel network like 10.8.x.x.
- Test connectivity: from a device on the local network, try pinging a resource only reachable through the VPN e.g., a remote host behind the VPN. Run a traceroute to verify the path goes through the VPN.
- Optional: Command-line version for exact control
- If you’re comfortable with the CLI, here’s a generic skeleton you can adapt. Replace placeholders with your actual values.
interface ovpn-client
add name=ovpn-out1
connect-address=VPN_SERVER_IP
port=1194
mode=ip
protocol=udp
cert-file=client.crt
key-file=client.key
ca-file=ca.crt
tls-auth-file=ta.key
user=””
password=””
verify-server-certificate=yes
cipher=aes-256-cbc
auth=sha256
add-default-route=yes
- Save and monitor
- Keep an eye on logs for any TLS handshake errors, certificate issues, or routing problems. MikroTik’s logs can reveal misconfigured ciphers, certificate mismatches, or blocked ports.
Notes and tips: Globalconnect vpn not connecting heres how to fix it fast
- If your OpenVPN server uses a nonstandard port, update the Port field accordingly.
- If you’re behind a double-NAT setup like some home networks, ensure your port is properly forwarded to the MikroTik or use a VPN server with a reachable public IP.
- Some MikroTik devices have limited CPU power. for high-throughput links, you may need to tune MTU and fragmentation to avoid packet loss.
DNS, routing, and traffic rules
Once the VPN is up, you might want to refine how traffic flows.
- Split tunneling: To send only specific traffic through the VPN, don’t enable the default route option in the OpenVPN client settings. Instead, create firewall rules and static routes for the VPN-subnet.
- DNS leaks: If you don’t want DNS leakage, ensure DNS queries go through the VPN by either:
- Pushing a DNS server via the VPN the VPN server provides a DNS over the tunnel or
- Overriding the MikroTik DNS to use a known secure resolver while the VPN is active.
- NAT handling: If you route all traffic through the VPN, you’ll typically use a Masquerade rule on the VPN interface for outbound NAT. Example:
/ip firewall nat add chain=srcnat out-interface=ovpn-out1 action=masquerade
-
Local network access: If you need devices on the local network to reach VPN resources, ensure your firewall allows those subnets to be routed as needed and set appropriate firewall filters to permit VPN traffic.
-
DNS on VPN: If the VPN server provides a DNS server e.g., 10.8.0.53, you can add a route to push DNS traffic over the VPN by:
- Defining a DNS server in RouterOS for the VPN interface, or
- Setting a DNS forwarder that uses the VPN DNS when the VPN is active.
-
IPv6 though the VPN: If your server supports IPv6 and your network uses IPv6, consider whether you want IPv6 traffic routed through the VPN. This requires additional planning and server-side support. How to use nordvpn openvpn config files your complete guide
Testing and verification
- Connectivity: From a device on the LAN, verify you can reach resources on the remote side hosts, services via the VPN tunnel.
- Route checks: Use traceroute from a client device to verify the path goes through the MikroTik’s VPN interface.
- DNS checks: On a client, perform a DNS lookup for an internal resource to confirm that DNS is resolving via the VPN or the local resolver as intended.
- Failover tests: If you have a secondary WAN or VPN path, test failover or backup routes to ensure continuity.
Common issues and fixes
- VPN not connecting: Double-check server address, port, protocol, and certificate compatibility. Ensure the ta.key TLS-auth is correctly configured if your server uses it.
- Certificate errors: Verify that ca.crt, client.crt, and client.key are correctly imported and accessible by the router. Ensure the certificates match the server’s CA and the client’s identity.
- DNS leaks: Ensure VPN-provided DNS is used or configure the router to force DNS over the VPN. If DNS queries bypass the VPN, add a rule to route DNS requests via the VPN interface.
- Split tunneling not working: Confirm the default route is not added if you want split tunneling. Add exact routes for the VPN-protected subnets.
- High latency or packet loss: Check UDP vs TCP. try switching to UDP if you’re on a stable network. Reduce MTU size to address fragmentation issues. increase the VPN buffer on the server if possible.
- Firewall blocks: Ensure firewall rules allow OpenVPN traffic on the configured port and protocol. Some corporate networks block VPN protocols. in those cases you may need to switch to TCP.
Performance tips and security best practices
- Use UDP whenever possible for OpenVPN to reduce overhead and improve throughput. reserve TCP for networks with strict reliability.
- Enable TLS-auth ta.key if your server uses TLS authentication. it adds a layer of protection against TLS handshake abuse.
- Keep RouterOS updated. OpenVPN client support improves with newer RouterOS versions and better crypto defaults.
- Use strong ciphers and modern authentication methods AES-256-CBC with SHA-256 or better.
- Disable remote admin interfaces that aren’t needed IP root access over the internet and limit admin access to trusted IPs.
- Regularly rotate client certificates and private keys if you suspect compromise.
- Document your VPN settings, including server address, port, protocol, cipher, and certificate aliases, to simplify future updates or migrations.
Real-world scenario: small office remote access with MikroTik OpenVPN
Imagine a small office with a single MikroTik router connecting to a centralized OpenVPN server at the data center. The office needs secure access to file shares, internal apps, and a handful of devices on the network. With the steps above, you can set up a stable OpenVPN client on the MikroTik and route:
- Internal traffic to the office file server through VPN by default.
- Internet traffic directly to the public network for speed, using split tunneling.
- A separate static route for a handful of remote devices that must always traverse the VPN path.
In this scenario, you benefit from:
- Centralized security and encryption without needing to install VPN software on every device.
- Simplified access control through the VPN gateway on the MikroTik.
- A straightforward failover plan if the VPN connection drops e.g., fallback to direct internet with restricted access.
Frequently Asked Questions
How do I know if my MikroTik supports OpenVPN client functionality?
Most recent MikroTik RouterOS versions include built-in OpenVPN client support. Check your device’s RouterOS version and the OpenVPN client interface documentation. If you’re on an older device, consider upgrading or using IPsec if you’re constrained by hardware.
What is the difference between OpenVPN UDP and TCP on MikroTik?
UDP generally offers better performance and lower latency, which makes it the preferred choice for most setups. TCP can be more reliable on networks that block UDP traffic or experience high packet loss, but it can add overhead and latency.
Can I run multiple OpenVPN clients on a MikroTik router?
Yes, you can run multiple OpenVPN client interfaces if your router has enough CPU and memory. Each client interface will require separate server addresses, keys/certs, and routing rules. Why your iphone vpn keeps connecting and how to stop it
How do I ensure my VPN connection restarts automatically if it drops?
Configure the OpenVPN client to reconnect automatically and set appropriate keepalive or script-based monitoring. MikroTik RouterOS typically handles reconnections automatically, but you can add scripts to verify the tunnel status on a schedule.
Is it safe to expose my OpenVPN server through MikroTik’s public Internet facing interface?
Not directly. Use strong authentication, TLS encryption, and firewall rules to limit who can reach the VPN endpoint. If possible, place the VPN server behind a firewall and only allow VPN connections from trusted networks.
How do I migrate from a different VPN client to MikroTik OpenVPN?
Export your VPN credentials and certificates from the old client, import them into MikroTik, and recreate the equivalent settings on the OVPN client interface. Compare server configuration details and ensure the same authentication methods and ciphers are used.
What should I do if the VPN is working but there’s DNS leakage?
If DNS queries escape the VPN tunnel, ensure the VPN-dispensed DNS server is used or override DNS on the MikroTik. You can add a DNS server that resolves through the VPN or set static DNS entries for VPN-protected hosts.
How can I monitor VPN traffic on MikroTik?
Use RouterOS logging and traffic monitoring tools to observe the OpenVPN interface. Look for connection status, handshake messages, and the data flow. You can also use ping/traceroute from devices behind the MikroTik to confirm end-to-end VPN reachability. How to create a vpn profile in microsoft intune step by step guide 2025 for Windows, iOS, and Android deployments
Do I need to upgrade RouterOS to improve OpenVPN reliability?
Upgrades often bring better crypto support and bug fixes that improve stability. If you encounter repeated OpenVPN issues, check for firmware updates and review changelogs related to OpenVPN and TLS handling.
What metrics should I use to decide between a split-tunnel and full-tunnel VPN setup?
- Security requirements: if every device should be protected by the VPN, use a full-tunnel approach.
- URL access patterns: if most traffic is local, split tunneling can improve performance.
- Network topology: consider where sensitive resources live and whether access should be tightly controlled through the VPN.
Useful tips for video-writers and readers
- Use a clean, step-by-step narration with visuals showing how to configure each field in the MikroTik OpenVPN client UI.
- Include a short troubleshooting segment showing how to read MikroTik logs to diagnose common issues.
- Demonstrate a split-tunnel scenario versus a full-tunnel scenario to illustrate the difference clearly.
- End with a quick recap and a checklist that viewers can screenshot.
Final notes
Setting up your mikrotik as an openvpn client a step by step guide is all about aligning server settings with MikroTik capabilities. With careful certificate handling, proper interface configuration, and precise routing rules, you’ll have a resilient VPN client that meets your security needs and performance expectations. If you liked this guide, consider exploring VPN options like NordVPN for additional layers of protection and ease of use in different environments. Remember to keep your RouterOS updated and regularly review your VPN configuration to adapt to changing network conditions and security best practices.