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Reliable SMS Alerting and Secure OTP Delivery in Banking

Use Case

Raiffeisen Bank Serbia selected SMSEagle to strengthen critical infrastructure communication by automating SMS notifications from internal monitoring tools and delivering one-time passwords (OTP) for secure remote access via SSL VPN.

Efficient and dependable delivery of SMS messages is vital for maintaining system uptime and secure connectivity for internal users and external partners.

“SMSEagle was a perfect choice to help us in delivering large volumes of SMS messages.”
Boris Zelenkapić
Head of Core, Network and Middleware Infrastructure, Raiffeisen Bank Serbia

About the company

Founded in 2001 and headquartered in Belgrade, Serbia, Raiffeisen Bank Serbia is one of the leading financial institutions in the country. The bank employs over 2,250 people and provides a full range of banking services, including retail banking for individual clients and small enterprises, corporate banking, as well as treasury and investment banking. Operating in a highly regulated environment, the bank places strong emphasis on security, reliability, and uninterrupted availability of its IT systems.

Company website: www.raiffeisenbank.rs

Challenge

The bank faced several challenges related to critical communication:

  • The IT team needed to deliver large volumes of SMS messages reliably to multiple recipients from monitoring and alerting systems.
  • Ensuring timely delivery of OTPs for secure SSL VPN access, particularly for external partners, was essential due to strict security requirements.
  • Prior to deployment, there was no dedicated on-premises SMS communication channel, which created operational risk and dependency on less predictable methods.

Solution & Deployment

To address these issues, Raiffeisen Bank Serbia implemented an on-premises SMSEagle SMS gateway solution:

    • Hardware deployed: 2× SMSEagle MHD-8100 4G (eight-modem devices)
    • Integration: Connected with infrastructure monitoring tools and SSL VPN systems to automate messaging
    • Communication channel: SMS
    • Key capabilities:
      • Direct SMS delivery via cellular network (no reliance on third-party cloud SMS services)
      • Scalable high-throughput sending for large message volumes
      • Reliable, fast delivery of alert messages and OTP codes

By installing SMSEagle gateways on-site, the bank gained control over its SMS communication, ensuring independence from external internet services and higher reliability.

Results & Benefits

  • Critical messages from monitoring tools now reach recipients promptly, improving response times during infrastructure incidents.
  • SMS delivery of OTPs for SSL VPN access provides a secure, user-friendly authentication method for partners.
  • IT and external teams consistently value the speed and reliability of SMS alerts and OTPs.
  • On-premises deployment eliminates dependency on third-party SMS services, reducing risk and improving performance.

The solution has been received very positively — internal operations teams and external partners alike appreciate the speed, reliability, and seamless integration of the SMS alerting and OTP delivery.

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