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Mobile Roaming Security

Protect your mobile core and subscribers from GTP attacks and malicious or careless peers. Ensure secure, seamless interconnection with GTP firewall.

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GTP Attacks from RAN and Roaming

Security threats to the mobile network have escalated as cyberattacks grow in sophistication and volume and use lightly protected mobile and IoT devices in their botnets or targeted attacks.


GPRS Tunneling Protocol (GTP) is at the heart of providing seamless interconnection at multiple network interfaces. As traffic, devices and interconnection partners surge, so does the use of GTP. Attackers try to exploit vulnerabilities by abusing GTP interfaces exposed to the network. After collecting network information and subscriber identities, attackers can launch a number of different attacks against subscribers and operators. GTP is inherently insecure as it was not designed with security in mind.


Operators must now include a GTP firewall as part of their current network security posture and as they evolve the network to 5G.

Fraud and Overbilling

Attackers can spoof subscriber identities to gain access to unauthorized services. Attackers can either bypass operator charging systems with an invalid IMSI or have the services billed to an actual subscriber. Operators will incur financial losses from data usage and the subscriber will get a huge bill.

Denial of Service

With a spoofed IMSI, attackers can hijack mobile connections, which will then deny service to the subscriber. By injecting malformed or malicious packets or a sufficient volume of GTP-C packets, attackers can also cause network elements to malfunction, disrupting services for a large number of subscribers or causing network degradation.


Attackers can intercept and snoop into GTP traffic to gain valuable subscriber information such as user location access credentials and other confidential details. This breach of confidentiality and the information gained can then be used to launch additional attacks on the subscriber or the network.

Network Resource Attacks

Internal network resources such as NAT are exposed to possible DoS attack. SCTP packets can be manipulated that allows malicious traffic to gain unauthorized access and propagate to other components.


The Urgency of Network Security in the Shared LTE/5G Era

Globally, mobile network operators (MNOs) are exploring ways to expand their addressable market by targeting new opportunities, such as Internet of Things use cases. In conjunction with A10 Networks, this IDC Technology Spotlight explores the expanding role network security will play as mobile operators evolve from LTE to 5G's service-based architecture (SBA).

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Modernize Your 4G/LTE Network Now for 5G Success

Unlike previous generational changes, the 5G rollout will be an evolutionary process - think of it not as a destination but a journey. However, mobile operators should not wait until the marketplace shakes out - that just gives competitors the first-mover advantage. The winning strategy is to act now. By carefully investing in upgrades to support specific 5G use cases, network operators can monetize their existing 4G/LTE infrastructure and modernize in preparation for the eventual migration to a full 5G architecture.

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