NetSecWall and the alternatives
There are good free tools in this space, and some of them will suit you better than NetSecWall. This page says which, and why. Everything about another product was read on its own site or repository on September 30, 2026; the sources are linked under each one. Prices and features change, so check theirs before you decide.
What NetSecWall does not do
- It does not limit or prioritise bandwidth. NetLimiter and Fort Firewall do.
- It is not open source. simplewall, TinyWall, Portmaster and Fort Firewall are.
- There is no free tier after the 7-day trial. GlassWire and Portmaster have one; four of the others are free outright.
- It does not encrypt or filter DNS itself. Portmaster does.
- It is not an antivirus: it watches the network and does not scan files.
- It runs on Windows 10 and 11 only, and needs administrator rights.
GlassWire
- The free tier monitors but does not block, and keeps one day of history.
- Its "suspicious hosts" list raises an alert when a PC contacts one.
- Extra checks NetSecWall does not have: evil-twin Wi-Fi, ARP spoofing and new-device alerts.
- We found no parental or category filtering on its feature or pricing pages.
- Choose GlassWire if
- you want a free monitor, its time-slider traffic graph, or the Wi-Fi and device alerts.
- Choose NetSecWall if
- you want to block by category or country, set bedtime and time limits, or edit every Windows Firewall rule in one list.
GlassWire. Read on September 30, 2026:Pricing, FAQ, User guide, Changes.
simplewall
- Blocks every program by default until you allow it.
- Its author describes it as "definitely for advanced users".
- Under a megabyte, with a portable mode; its filters keep working when the app is closed.
- Rules are addresses and ports. We found no domain rules, threat feeds or parental filtering in its documentation.
- Choose simplewall if
- you want a tiny, free, auditable default-deny filter and are comfortable writing rules.
- Choose NetSecWall if
- you want to see what each program is doing, keep a history, and block by list or category instead of by address.
simplewall. Read on September 30, 2026:Repository and README, Releases.
TinyWall
- No pop-ups by design: it does not tell you in real time when something is blocked. You whitelist a program by window, process or hotkey.
- Lists established and blocked connections.
- Its FAQ says it is not suited to networks of more than five computers and has no remote management.
- Choose TinyWall if
- you want a free firewall you set up once and that never interrupts you.
- Choose NetSecWall if
- you want to be told what is connecting, with history, threat lists and parental controls.
TinyWall. Read on September 30, 2026:Features, FAQ, Download.
Portmaster
- Filters at DNS level with lists that update hourly, and offers encrypted DNS (DoT and DoH).
- The live per-program monitor is free; searchable history and bandwidth figures are in the paid plans.
- Also runs on Linux. Pro adds its SPN privacy network.
- It can prompt for new connections; the default is to allow.
- Choose Portmaster if
- you want open source, DNS-level tracker blocking, encrypted DNS, or Linux support.
- Choose NetSecWall if
- you want parental schedules and time limits, behaviour detections, or blocking that works through Windows Firewall with no kernel driver.
Portmaster. Read on September 30, 2026:Pricing, Features, Repository, Settings.
Windows Firewall Control
- Notifies you when an outbound connection is blocked and lets you create a rule from the prompt.
- Strong rule housekeeping: duplicate and invalid rules, temporary rules, protection against other programs changing rules.
- Runs under standard user accounts and supports Windows Server.
- Its feature list has a connections log, and no bandwidth graphs or blocklists.
- Choose Windows Firewall Control if
- all you want is better control of Windows Firewall rules with prompts, for free.
- Choose NetSecWall if
- you also want the live traffic view, history, threat lists and parental controls.
Windows Firewall Control. Read on September 30, 2026:Product page, FAQ, Changelog.
NetLimiter
- Shapes traffic: speed limits per program or connection, priorities, quotas and a rule scheduler.
- Long-term statistics, connection history and a traffic chart.
- Can ask before a program connects, and can control another PC that runs NetLimiter.
- We found no threat feeds or parental categories on its site.
- Choose NetLimiter if
- you need to limit or prioritise bandwidth. NetSecWall does not limit speeds.
- Choose NetSecWall if
- your question is what is connecting and whether it should, not how fast.
NetLimiter. Read on September 30, 2026:Buy, Features, Components, Release.
Fort Firewall
- Speed limits per application group, wildcard paths and rules by parent process or service name.
- Traffic statistics and a bandwidth graph; blocklists of addresses through "zones".
- Its wiki says Windows 10 and later need Memory Integrity (HVCI) switched off for its driver to load.
- Its own comparison table lists domain names in rules as not supported.
- Choose Fort Firewall if
- you want free, open-source filtering with speed limits and fine-grained rules, and accept switching Memory Integrity off.
- Choose NetSecWall if
- you want to leave Memory Integrity on, block by domain list or category, and have parental controls.
Fort Firewall. Read on September 30, 2026:Repository, Functionality overview, HVCI, Releases.
Windows Defender Firewall
- Prompts only when a program starts listening for inbound connections. There is no outbound prompt.
- Logs dropped packets and successful connections to a file.
- Managed centrally with Group Policy, Intune and PowerShell.
- Choose Windows Defender Firewall if
- the defaults are enough for you. It is already on.
- Choose NetSecWall if
- you want to see and decide what goes out. NetSecWall works on top of Windows Firewall: its blocks are Windows Firewall rules.
Windows Defender Firewall. Read on September 30, 2026:Overview, Rules.
Try it against the one you use now
NetSecWall's trial is 7 days with everything unlocked, and needs no account or card. It can run beside another monitor; run only one tool thatblocks at a time, or you will not know which one stopped a connection.
Download NetSecWall See plans and prices
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