An exposed remote-desktop port is scanned thousands of times a day from networks across the world. Geo Firewall blocks that traffic at the IP level — before it ever reaches the Windows login screen — by allowing only the countries where legitimate administrators actually sign in.
Remote Desktop is the fastest way to administer a Windows server and one of the most heavily attacked. Automated botnets continuously scan the public Internet for port 3389, then hammer any server they find with credential guesses around the clock. A single weak or reused password is all it takes for that traffic to turn into a ransomware incident. The same pattern applies to other management surfaces such as database, mail and file-transfer services exposed to the Internet.
The overwhelming majority of that traffic comes from places where an organization has no users, no offices and no business. Allowing only the regions that matter is one of the simplest, highest-impact ways to shrink a server's attack surface — and it is exactly what Geo Firewall is built to do.
A kernel-mode network driver inspects every connection against a geo-IP database of more than 250 territories and drops traffic from blocked regions before it reaches the remote-desktop service. Rules apply to IPv4, IPv6, TCP and UDP.
Administrator IP addresses and subnets go on the whitelist and are always allowed, regardless of geographic rules. Port range exceptions can reopen a public service port worldwide while management ports stay restricted to trusted regions.
Live statistics and an activity log show exactly which territories were allowed or blocked and how much traffic each one generated. New rules can be created directly from what the traffic reveals.
Geo Firewall is compatible with the antivirus and security tools already running on the server. It adds a distinct geographic layer of defense — and the more independent layers there are, the harder a server is to breach.
Download and install on the Windows server or cloud VM. No additional hardware is required.
Add the remote-desktop client IP to the whitelist right away so management access can never be cut off. See the RDP lockout recovery guide for cloud VMs.
Select the territories where no legitimate administrators sign in and block them for inbound and outbound traffic.
Use the statistics and log to confirm the blocked traffic and tighten or relax rules as the picture becomes clear.
Country IP ranges can be scripted into Windows Firewall by hand, but those lists go stale the moment address blocks are reassigned, offer no visibility into what was blocked, and are awkward to maintain across servers. Geo Firewall is purpose-built for the job.
| Capability | Manual Windows Firewall lists | Geo Firewall |
|---|---|---|
| Geo-IP database kept current | Manual re-import of country lists | Automatic updates from the cloud |
| Inbound and outbound control | Limited and hard to manage | Separate actions per territory, both directions |
| Traffic visibility | None | Per-territory statistics and activity log |
| Open a port for a blocked country | Difficult to maintain | Built-in port range exceptions |
| Setup | PowerShell scripting | Point-and-click, with a free edition to start |
Most automated RDP brute-force traffic originates from networks in regions where an organization has no legitimate administrators. Blocking those territories at the IP level removes the bulk of that traffic before it reaches the login screen, sharply reducing failed sign-in noise and the chance of a successful guess.
Trusted administrator IP addresses and subnets can be placed on the whitelist so they are always allowed, regardless of geographic rules. On a cloud VM it is recommended to whitelist the remote-desktop client address right after installation to avoid an accidental lockout.
Yes. Geo Firewall runs on Windows Server 2012, 2012 R2, 2016, 2019, 2022 and 2025, as well as Windows 10 and 11. It uses a kernel-mode network driver and works alongside existing security software.
Yes. Port range exceptions can reopen specific ports for territories that are otherwise blocked, so a public web port can remain reachable worldwide while remote-desktop and management ports are restricted to trusted regions.
Start with the free Basic edition or compare the Pro and Ultimate editions for servers that need the full rule set, statistics and logging.
Notes:
* Windows® is a registered trademark of the Microsoft Corporation.
Shopping Cart
Multi Port Forwarder
DNS Proxywall
Geo Firewall
Geo Router
Virtual Network Hub
