Firewalls

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Firewalls: hardware and software that control what traffic may pass between your devices and the internet, blocking connections you did not ask for (CISA). A home router has a basic firewall; a dedicated firewall adds device isolation (IoT/guest networks), intrusion prevention, VPN and better logs. To choose one: match it to your internet speed and number of devices, check how long it gets security updates and whether features need a subscription, and keep the built-in firewall on every computer turned on too (NIST SP 800-41).

More on webcentive: Today in Firewall News | Firewalls for stores | fridge hack prevention

Popular firewalls on Amazon: firewall appliances | Firewalla | UniFi gateways | pfSense / OPNsense mini PCs | VPN routers | next-gen firewalls

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Links last checked Nov 2, 2026.

Text Only \| Markdown	X	whois	history	safety	sitesearch	Grok	Bing AI	Amazon
Home and small business firewalls For homes and small offices. Firewalla and Ubiquiti are the easiest; Netgate and Protectli boxes run pfSense or OPNsense for more control.
firewalla.com - Firewalla: plug-in home and small business firewalls (no subscription), with IoT device isolation	X: @FirewallaLLC	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Firewalla
netgate.com - Netgate: pfSense Plus firewall appliances	X: @NetgateUSA	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Netgate pfSense
protectli.com - Protectli Vault: small firewall PCs for pfSense, OPNsense and other firewall software	X: @protectli	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Protectli Vault
ui.com - Ubiquiti UniFi: Cloud Gateways and Dream Machines with built-in firewall and VLANs	X: @Ubiquiti	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: UniFi Cloud Gateway
zyxel.com/us - Zyxel: USG FLEX and ZyWALL small business firewalls (Taiwan)	X: @ZyxelNews	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Zyxel USG FLEX firewall
Business and enterprise firewalls For offices with IT staff or a managed service provider. Most need a yearly security subscription for updates and threat filtering; keep firmware current, because firewalls themselves are a common attack target (see CISA advisories).
barracuda.com - Barracuda CloudGen Firewall	X: @barracuda	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
checkpoint.com - Check Point: Quantum security gateways	X: @CheckPointSW	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
fortinet.com/FortiGate - Fortinet FortiGate next-generation firewalls	X: @Fortinet	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: FortiGate firewall
meraki.cisco.com - Cisco Meraki MX cloud-managed security appliances (may block automated checks)	X: @meraki	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Cisco Meraki MX
paloaltonetworks.com - Palo Alto Networks: PA-Series next-generation firewalls	X: @PaloAltoNtwks	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
sonicwall.com - SonicWall: TZ and NSa firewalls	X: @SonicWall	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: SonicWall TZ firewall
sophos.com - Sophos Firewall (XGS appliances) (may block automated checks)	X: @Sophos	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
watchguard.com - WatchGuard Firebox firewalls	X: @watchguard	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: WatchGuard Firebox
Open-source firewall software Free software you install on a small PC or appliance (for example a Protectli or Deciso box).
deciso.com - Deciso (Netherlands): the company behind OPNsense, sells OPNsense appliances	X: none found	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
ipfire.org - IPFire: free open-source Linux firewall	X: @ipfire	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
openwrt.org - OpenWrt: open-source router firmware with a built-in firewall (may block automated checks)	X: none found	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
opnsense.org - OPNsense: free open-source firewall (FreeBSD)	X: @opnsense	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
pfsense.org - pfSense CE: free open-source firewall (FreeBSD), sponsored by Netgate	X: @pfsense	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
Software and endpoint firewalls Software firewalls run on each computer. Windows and macOS include one; keep it on. Outbound firewalls such as Little Snitch and LuLu show which apps connect out.
bitdefender.com - Bitdefender: security suites with a firewall	X: @Bitdefender	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Bitdefender Total Security
eset.com - ESET: security suites with a firewall (Slovakia)	X: @ESET	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: ESET security
glasswire.com - GlassWire: network monitor and firewall for Windows	X: @GlassWire	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
learn.microsoft.com/Windows Firewall - Windows Firewall (built into Windows): keep it turned on	X: @Microsoft	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
norton.com - Norton 360: security suite with Smart Firewall	X: @Norton	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: Norton 360
obdev.at/Little Snitch - Little Snitch: outbound application firewall for Mac	X: @littlesnitch	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
objective-see.org/LuLu - LuLu (Objective-See): free open-source outbound firewall for Mac	X: @objective_see	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
How to choose a firewall Checklist: turn on the firewall in your router and every computer; change default admin passwords; keep firmware updated; put smart devices on a separate network; do not expose admin pages to the internet.
amazon.com - Amazon: firewall appliances and routers	X: @amazon	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: firewall appliance
cisa.gov/understanding firewalls - CISA: understanding firewalls for home and small office use	X: @CISAgov	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none
csrc.nist.gov/SP 800-41 - NIST SP 800-41 Rev. 1: guidelines on firewalls and firewall policy	X: @NIST	whois	history	safety	search	AI Mode	Grok	Bing AI	Amazon: none

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