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Secure by Design: Best Practices for Teltonika Networks Devices

25 August 2025

In an increasingly connected world, network security is no longer an afterthought – it’s a fundamental requirement. Teltonika Networks devices, from industrial routers to gateways and switches, are trusted around the globe in sectors such as smart cities, transportation, utilities, and critical infrastructure. With such high stakes use cases, ensuring that these devices are deployed securely is absolutely essential.

Teltonika Networks promotes a “Secure by Design” philosophy, embedding protective measures into both the hardware and firmware from the outset. But like all networking equipment, ultimate security depends on how the devices are configured, maintained, and integrated into their environment. To help users safeguard their networks, Teltonika has published a comprehensive Security Guidelines document on its official wiki. These practical recommendations help ensure that installations remain protected from unauthorised access and cyber threats – whether the router is installed in a moving vehicle or a remote power station.

This article highlights the most important of those recommendations and offers practical, real-world insights for anyone deploying Teltonika devices in the field.

Starting strong – secure credentials and firmware updates

Teltonika’s guidance starts with the basics – never use default login credentials. All devices ship with factory-default usernames and passwords, which are publicly documented to make initial access simple. However, this also makes them vulnerable. As soon as a router is powered on and connected to a network, the admin password should be changed to a strong, unique one.

Next, users are advised to update the device firmware to the latest stable version. Firmware updates often include important security patches as well as performance enhancements. Teltonika offers two firmware branches:

  • Tested (TS): Recommended for production environments, offering a stable and validated feature set.
  • Mainline (ML): Includes newer features and is more frequently updated but may be less stable for mission-critical deployments.

Firmware can be downloaded from Teltonika’s website or pushed remotely using the Remote Management System (RMS), making it easy to manage multiple devices across a fleet.

Limit exposure – disable unused services and ports

One of the most effective ways to reduce risk is to minimise the number of open services and ports on each device. Many cyberattacks exploit services that remain open by default but are not actively used. According to Teltonika’s security guidelines, the following services should be disabled unless absolutely necessary:

  • HTTP (use HTTPS instead)
  • Telnet
  • FTP
  • Remote WebUI or CLI access

Where remote access is required, Teltonika recommends using secure protocols only, such as HTTPS or SSH with public key authentication, and restricting access using firewall rules or IP whitelisting.

Teltonika also advises disabling unused interfaces (such as Wi-Fi, WAN ports, or mobile data connections) if they are not part of the intended configuration. Reducing the number of entry points significantly lowers the device’s vulnerability to unauthorised access.

User access management and two-factor authentication

Teltonika devices support multiple user accounts with different permission levels. Best practice is to avoid using shared logins and to limit user access to only what is necessary. For example, an engineer performing diagnostics might only need read-only access, while a systems administrator requires full privileges.

As of firmware version RUTOS 07.02.7 and higher, Teltonika devices also support two-factor authentication (2FA) for WebUI access. Enabling this feature ensures that even if a password is compromised, an attacker cannot gain access without the secondary verification code. It’s a simple but effective way to harden login security.

VPN support – secure data in transit

Teltonika routers support a wide range of VPN protocols, including:

  • OpenVPN
  • IPsec
  • WireGuard
  • GRE, L2TP, and PPTP

These protocols are essential for encrypting data travelling between remote devices, branch offices, or cloud platforms. VPN tunnels ensure that even if traffic is intercepted, the contents remain unreadable to outsiders.

For added convenience, Teltonika offers RMS VPN, a service that allows administrators to create secure tunnels between devices without needing advanced networking knowledge. VPN profiles can be configured through a user-friendly interface and deployed instantly across multiple endpoints.

RMS security – managing devices without risk

One of the standout tools in Teltonika’s ecosystem is the Remote Management System (RMS). It provides a secure and scalable way to monitor, configure, and maintain Teltonika routers across distributed locations – without exposing them to the public internet.

Key RMS features with security implications include:

  • RMS Connect: Secure, on-demand access to connected devices like PLCs, HMIs, or IP cameras via encrypted links.
  • User Role Management: Define access levels for team members, ensuring only authorised personnel can make configuration changes.
  • Audit Logs: Track who accessed which device and when.
  • Two-Factor Authentication for RMS portal access.

Because devices connected via RMS do not require open public-facing ports, the attack surface is greatly reduced. RMS also allows for scheduled firmware updates, automatic configuration backups, and alerting, all of which contribute to a hardened network environment.

Logging and maintenance

Teltonika routers are equipped with detailed system logging capabilities, which help administrators detect abnormal behaviour such as repeated failed login attempts, unexpected reboots, or service errors. Logs can be stored locally or sent to a remote Syslog server for centralised monitoring.

Performing regular backups is also recommended. Configuration files can be easily exported and stored securely, making it easy to restore devices to a known-good state in case of accidental misconfiguration or factory reset.

Why security matters in practice

Although Teltonika routers are equipped with robust security tools, they only work when properly used. Left unsecured, networking devices can become points of failure, leading to risks such as:

  • Unauthorised control of connected equipment
  • Interception of sensitive data
  • Use in botnet attacks
  • Loss of visibility or service outages

By following Teltonika’s official security guidelines – available on their wiki – users can significantly reduce these risks. These aren’t just “nice-to-have” recommendations; they’re fundamental for any deployment involving sensitive, mobile, or industrial data.

Working with trusted partners

At Cogent Distribution, we understand the technical and operational importance of security in networked devices. As an official UK value-added distributor for Teltonika Networks, we offer more than just hardware. We provide expert advice, product selection support, and guidance on secure configuration and deployment.

Whether you’re managing a national fleet or a single remote installation, we can help you source and secure the right Teltonika solution for your project.

Visit us to view and purchase Teltonika devices at:
www.cogentdistribution.com/products/vendors/teltonika-networks/

Final thoughts

Security is not a one-time configuration – it’s an ongoing responsibility. Teltonika Networks makes it easy to implement strong, scalable protections with features built directly into their devices and platforms. By following the officially published security recommendations, organisations can deploy with confidence, knowing their networks are secure, resilient, and future-ready.

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Speak to a member of our team by calling +44 (0)1635 917722 or emailing [email protected].
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