When an SMS is transmitted via a telecom network, it carries not just a message but also trust, revenue, and brand value. However, today, this stream has been damaged by spam, grey routes, and scams that are eating operator earnings. For telecom operators, it has become a headache to protect users’ privacy and their own bread and butter. In this situation, they use an SMS firewall. It is an active policy enforcement and security system that monitors, scans, and filters signaling traffic (SS7, Diameter, and SMPP protocols) in real-time. In this article, we will explain to you how it secures messaging and improves revenue control.
Key Security Threats in SMS Networks
What if I say to you that trust is the currency of messaging? Yes, you heard it right. But once it’s broken, both users and revenue go away. SMS is still one of the most used communication channels, but it has also become a prime target for fraud. The following are the key security threats that operators should be aware of:
- SMS Spam & Smishing (Phishing via SMS): In this, scammers use AI to create persuasive messages that look real and personal. For example, a fake bank or delivery notification can mislead users and ask them to share their personal information.
- SIM Box Fraud & Grey Routes: In this, cyber criminals use GSM/SMS gateways and grey routes to convert international calls/messages into local traffic to avoid roaming charges.
- Flash SMS Abuse: These are pop-up messages that usually don’t get stored in the inbox. Due to this, they are quite difficult to track and easy to misuse for scams or bulk marketing.
- Others: It includes SMS pumping (fake OTP requests), sender ID spoofing, and SIM swapping. These are all released to exploit system gaps and user trust on a large scale.
How SMS Firewalls Improve Security
Over 90% of SMS messages are read within minutes. This speed acts like a catalyst for fraud. One bogus message can reach out to thousands of people in seconds and infiltrate the whole network. This is how the managed SMS firewall solution upgrades the security of the operator network:
- Live and Instant Message Filtering: Any message that is sent over a network is authenticated. The firewall screens the sender details, routes, and message content before it is delivered to the receiver. If anything raises eyebrows, it is blocked on the spot. This superfast screening blocks all the threats way before they reach the user’s device.
- Content-Based and Rule-Based Blocking: SMS firewalls have a specific set of rules that they follow to identify malicious content. These rules flag dubious links, phony keywords, or unknown sender IDs by default. Operators can also make custom rules for their network.
- AI-Driven Fraud Detection: The latest SMS firewalls have AI features in them. They analyze the traffic, then become familiar with the behavior and recognize abnormal patterns such as sudden bulk messaging or SMS routing This prevents advanced threats such as grey routes and SIM box fraud from happening, which standard systems can’t normally detect.
- Protect Subscribers from Scams: From fake bank alerts to OTP theft attempts, SMS firewalls actively prevent “smishing” attacks. They verify links, detect if there is any spoofing done by the sender, and remove phishing messages to keep users safe and maintain trust in the operator’s network.
What is Revenue Leakage in Telecom?
In telecom, not every loss is noticeable. It can happen message by message or route by route. Several experts that provides telecom consultancy services believe that operators lose billions every year, which also includes the 7% of potential revenue that is being stolen from the network operators by different means. This loss is known as revenue leakage in technical language, and in SMS networks, it’s very common.
Revenue leakage is the gap between what operators should earn and what they actually earn. To deliver a quality SMS, a network needs resources, but the billing doesn’t always match the delivered value/service. This can be a result of rating errors, missing records, or bypass mechanisms that disrupt the charging process.
Grey routes play a big role in this hidden loss. They are like “shortcuts” that bypass official and high-value routes. What they actually do is that they help businesses or aggregators to redirect the traffic via the anonymous routes at a low cost or for free, so that they don’t have to pay the standard A2P rates. As a result, the operators carry the load but earn only a fraction or sometimes nothing at all.
Further, A2P messages such as OTPs, alerts, and promotions generate a good amount of revenue. But when this traffic is disguised by grey routes, operators lose that premium margin completely. Over time, this not only impacts revenue but also results in the loss of control over network quality and trust.
How SMS Firewalls Help Recover Revenue
Revenue lost in silence is the most difficult to track down. Messages that look normal on the paper may actually be bypassing legit routes for free. SMS firewalls provide information about message flows and ensure every business message follows the right path and pricing. As a leading telecom consulting services provider, ComCode believes that this is how SMS firewalls help recover revenue:
- Block Unauthorized Routes (Grey Route Control): SMS firewalls look for shady patterns, such as international traffic masked as local, and block these grey routes. It shut down the SIM boxes and bypass channels so that the operators can bring back the traffic to real routes.
- Implement A2P Monetization: SMS traffic can be of two different types: A2P and P2P. Firewalls can easily differentiate between A2P and P2P messages. This assures that high-value A2P traffic is categorized and charged at premium rates, not the same as P2P rates.
- Route Optimization and Traffic Control: When the operator has 100% access to traffic, they can redirect messages through proven and profitable channels. This not only improves the quality of the SMS delivery but also gives an opportunity to route the traffic in a better way.
- Set Fair Prices for Enterprise Messaging: As SMS firewalls validate sender profiles and prevent spoofing, the only option for enterprises is to use authorized channels. This builds trust and encourages businesses to pay the right rates for secure and reliable messaging services.
In Summary
An SMS firewall is a necessary system for every telecom operator. It helps block irrelevant traffic, protect users, and recover lost revenue by allowing only legit messages to pass through. Operators who have installed this system in their network have seen better control of revenue. If you also want to develop and install a custom SMS firewall for your telecom network, contact the experts at ComCode Technologies. We are a telecom software solutions and consultancy provider company that designs solutions to support various service providers, such as those in the MVNOs, MNOs, messaging service providers, private LTE, private 5G, etc. Check our website for more information.