Every new branch helps a bank reach more customers. Every new branch also adds a new door into the network. In Tanzania, banks and microfinance institutions are opening branches and agent points well beyond Dar es Salaam, in Arusha, Mwanza, Dodoma, Mbeya and smaller towns. Many of these sites run on mixed internet links, have no IT staff on site, and connect straight back to the core banking system. That makes the branch the place attackers look first.
This guide explains the main risks at branch level and the practical steps that close them, without needing a large IT team in every location.
Why branches are the weak point
- Many links, little control. A typical branch may use fibre, a 4G router as backup and sometimes a VSAT link. Each one needs to be secured, and each one is often configured differently.
- No IT staff on site. When something breaks, staff find their own fix: a personal hotspot, a shared password or a USB stick. These shortcuts create gaps.
- Flat networks. In many branches, teller PCs, CCTV, ATMs and guest Wi-Fi all sit on the same network. One infected laptop can then reach everything.
- Old equipment. Routers and firewalls bought years ago may no longer receive security updates.
- Phishing reaches every desk. Branch staff receive the same fake emails and calls as head office, often with less training.
Six steps to secure your branch network
1. Put a next-generation firewall at every branch
A basic router is not enough. A next-generation firewall (NGFW) inspects traffic, blocks known threats and controls which applications are allowed. Compact models such as the Fortinet FortiGate range are designed for branches: they are small, affordable and managed centrally from head office.
2. Use SD-WAN to manage all your links
SD-WAN lets a branch use fibre, 4G and other links together. If the main link goes down, traffic moves to the backup automatically, so tellers keep serving customers. Because the SD-WAN is built into the firewall, every link is encrypted and secured the same way. For banks with many branches, this also reduces the cost of expensive dedicated lines.
3. Separate the network into zones
Teller and back-office PCs, ATMs, CCTV and guest Wi-Fi should each sit in their own zone, with firewall rules between them. If a customer’s phone on guest Wi-Fi is infected, it cannot reach the core banking system. This step costs little and removes one of the most common risks we find during assessments.
4. Protect every login with multi-factor authentication
Stolen passwords remain one of the easiest ways into a bank’s systems. Multi-factor authentication (MFA) on email, VPN and core applications means a password alone is not enough. With Microsoft 365, MFA is already included and can be switched on for every user.
5. Monitor all branches from one place
Your IT team should see every branch on one dashboard: which links are up, which devices are connected and which threats were blocked. Central logging also gives you the evidence auditors and regulators ask for. Solutions from Fortinet and Sangfor provide central management and reporting for all sites.
6. Train branch staff and write simple rules
Technology only works if people use it correctly. Short, regular training on phishing, password use and USB devices makes a real difference. Give every branch a one-page rule sheet: who to call, what not to plug in, and how to report something suspicious.
Meeting regulatory expectations
Banks and financial institutions in Tanzania are expected to manage ICT and cyber risk under Bank of Tanzania requirements, and to protect customer information under the Personal Data Protection Act. The steps above, especially central logging, access control and network separation, give you clear evidence that branch risks are being managed when auditors ask.
A quick branch security checklist
- Does every branch have a supported firewall that still receives updates?
- Does each branch have a backup internet link that switches over automatically?
- Are teller PCs, ATMs, CCTV and guest Wi-Fi on separate network zones?
- Is MFA switched on for email, VPN and core systems?
- Can head office see the status of every branch on one screen?
- Have branch staff received security training in the last 12 months?
If you answered “no” or “not sure” to any of these questions, it is worth taking a closer look.
How Junubia Host can help
Junubia Host is a Fortinet and Sangfor partner with offices in Dar es Salaam, Juba and Kigali. We design, install and support branch security for banks and microfinance institutions, from a single branch to a national network.
Start with a free IT assessment. Our engineers will review your branch network and give you a short, clear report on what to fix first. There is no cost and no obligation. Request your free assessment or message us on WhatsApp: +255 768 404 666 (Tanzania and Rwanda) or +211 924 786 666 (South Sudan).
Written by Dut Majak, CEO and Founder of Junubia Host Co Ltd. Dut leads Junubia’s work with banks, government institutions, NGOs and businesses across South Sudan, Tanzania and Rwanda.
