Mac OS claims that there is no need to install any antivirus, or any such security in your Apple Mac, because there is no way your Mac will ever get affected by a virus. Following the claim, most Mac user does not have any antivirus, or even any firewall installed in their laptops/desktops, which can actually prove helpful for the hackers. Therefore the recommended thing to do is to activate a firewall for protecting your important information from being hacked, as well as from stopping Trojan and other such virus from sending information from your system.
Little Snitch is one such firewall application, that helps in protecting your private data from being sent out as well as from being hacked by hackers. But, Little Snitch is not the only application that works like the firewall, there are few other applications as well that acts as the firewall for Mac OS. Below mentioned is a list of few such free apps that you can install to protect your privacy.
- 1.磊 Avira Free Antivirus for Mac — Best for Overall macOS Protection in 2021. Avira Free Antivirus for Mac is my favorite free antivirus for Mac — it provides lightweight cloud-based malware scanning as well as more free features than any other brand on this list, including real-time protection, intuitive system tuneup tools, a surprisingly good password manager, and even a VPN!
- ZoneAlarm Free Firewall: Free; ZoneAlarm Free Antivirus + Firewall: $44.95/year; Features: Free Antivirus + Firewall, Multiple security layers, Customizable interface, Online backup, etc. Pros: 5Gb of free cloud backup. Integration with many other security programs. Cons: No protection for exploit attack.
Radio Silence
Top 5 Free Firewall APP for Mac. Mac OS claims that there is no need to install any antivirus, or any such security in your Apple Mac, because there is no way your Mac will ever get affected by a virus. Following the claim, most Mac user does not have any antivirus, or even any firewall installed in their laptops/desktops, which can actually.
The most useful and handy app for all the others is Radio Silence. It is a small app that allows you to particularize and block all the apps you want from accessing the internet. Moreover, it is very user-friendly and is designed for all those who are not at all tech savvy and don’t want to go into the very detailed configuration. The best thing about radio silence is, you can install and forget about it, as it does not require any specific maintenance neither does it interrupts you by creating pop-ups. Also, it is quite fast and takes only a little of your system space.
FeaturesRadio Silence lets you keep a list of apps that aren't allowed to go online.
Protect your privacy
Prevent apps from phoning home
Save on bandwidth and data charges
Radio Silence is completely invisible
The firewall is invisible and always active. You don't have to keep any windows open.
No annoying pop-ups
No clutter on your screen or dock
No effect on your Mac's performance
Radio Silence’s network monitor shows you every network connection in real time.
If you find a misbehaving app, you can block it with a single click.
Radio Silence exposes everything
Find the hidden helpers and background processes apps use to make connections:
Hands Off
Another amazing app, that helps in protecting your private data. The app runs silently, and only when an application tries to send out any data, hands off takes a step and notifies the user about it. The best thing about Hands Off is, it blocks a certain app and thus keeps the system protected, till the user personally unblocks it. Hands Off are known for blocking both incoming and outgoing data. It further protects the system from Trojans, warms etc. You can certainly try it out once. After all, it's free.
FeaturesHands Off! is an application to monitor and control the access of applications to your network and disks. Being able to monitor the normally unnoticeable activities enables you to make informed decisions regarding the transfer of your private information, hence avoiding confidential information leakage.
When connected to the Internet, applications can send any information stored on your computer to whoever they want without you ever knowing. Using Hands Off!, you can monitor and control Internet connections from all applications as to expose hidden connections and prevent them from sending data or phoning home without your consent.
Applications present on your computer can freely read, store or erase information on your computer without your knowledge. Using Hands Off!, you can monitor and control disk access from all applications as to prevent them from obtaining confidential information, erasing your data or storing cookies.
Murus
It is a basic level free app that can be downloaded as well as used for free. It is mostly designed for the novice, and can be used by those who do not have a lot to protect. It features inbound filtering and logging and can be used to protect services running on the Mac. The basic functions of Murus include filtering of incoming data.
Murus Lite is free for both personal and commercial use.
IceFloor
IceFloor is a graphic PF firewall. It is known for regulating PF configurations, logging, bandwidth, different kinds of filtering and etc. many more connections. The functioning of it can be a bit complex for some, because it is known for creating different groups which further blocks or passes the connections, assigns parameters, addresses etc.
FeaturesIceFloor is a free and open source graphic interface for the OS X built-in PF network firewall.
IceFloor is group based. Create groups and assign addresses, services and parameters to pass or block connections
makes use of its own set of PF configuration files; default OS X PF configuration files in /etc are not modified by IceFloor
start with IceFloor Wizard to create a basic PF configuration in a few mouse clicks
use IceFloor interface to set up very complex and customized PF rulesets
manage inbound and outbound connections with filtering and bandwidth rules for your Mac and NAT clients
hide services using port knocking, list and block connections on the fly using Inspector
create new configuration presets and easily switch between predefined and custom PF presets
mix IceFloor PF rules with your custom PF rules, interact with external applications like sshguard
share Internet connection using PF NAT, assign per-client filtering and bandwidth rules and redirections
browse PF ruleset with the new PF Rules Browser, display filtering, bandwidth and NAT PF rules and pipes
analyze PF logs with numerical and graphical statistics, enumerate remote hosts using stroke or nmap based GUI tools
debug and test PF rulesets easily and quickly using the optional IceFloor Menulet
IceFloor requires OS X 10.7 or later. Some features requires OS X 10.8 or later.
Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.
Flying Buttress
Flying Buttress is for those who intend on having a strong and high-end firewall system. This is for those people who want advanced firewall system. Flying buttress performs all kind of advanced works like it filters host or various network addresses. It discerns configurations based on their networks, it also helps in forwarding and configuring NAT and many more. Flying Buttress is usually not recommended for day to day use, unless you are looking for some high-end system to protect your data.Besides the above-mentioned ones there are few other free firewall apps for Mac like –
FeaturesFirewall filters that include qualifiers on host or network addresses
Firewall filters that operate on other than TCP or UDP protocols
Firewall filters that include the whole range of ipfw qualifiers, such as IP options, ICMP types or TCP flags
Per-filter logging configuration, including the ability to log allowed connections and the option to not log certain types of denied connections
NAT port forwarding or other custom NAT configuration
Different filter configurations on different network interfaces.
A persistant, searchable firewall log entry database with graphical log viewer
Scriptable control of your firewall, such as via cron or other shell automation
Access and ability to easily edit the raw firewall configuration text, including an integrated ipfw filter syntax checker.
The ability to switch between different firewall configuration sets quickly and easily.
Rubbernet
Rubbernet helps in keeping an eye on all the network-based apps. It keeps a tag of all the activities of the specified apps and monitors the data shared over those apps. It also provides an in-detailed usage of the network of every app.
FeaturesReal-time network dashboard:
Rubbernet provides real-time monitoring so you can keep an eye on the exact state of your live network connections. With the Activity sidebar, you'll be able to see which applications are currently communicating over your network. When connections are idle, they will dim to let you know that traffic has stopped.
App bandwidth usage:
Rubbernet provides a breakdown of per-app network usage, so you can quickly detect apps that phone home, connect to certain servers without your knowledge, or blame the app that's slowing down your network.
Live graphs:
Real-time charting displays download and upload transfer rates for all active apps on all monitored Macs. Visualize your network usage and get a bead on network hogs before they get out of control.
Monitor all computers on your network from one Rubbernet instance on your Mac. No need to get up and open Rubbernet on a remote Mac to see its network statistics. Unlike other network monitoring tools, there is no complicated setup. It takes just a second to install or uninstall the necessary tools for Rubbernet to work. After that, they sit quietly in the background and provide the app with live data with minimal resource consumption.
LuLu
LuLu is used for blocking all unsanctioned outgoing network transfer. It does not have many functions, and only provides protection against sharing unauthorized data.
TripMode
It has only one particular function and that is to block the internet connection for the specified applications.
FeaturesTripMode automatically reduces your mobile data consumption when you use a mobile hotspot
Only apps that you’ve selected are allowed to access the Internet when TripMode is ON. The rest is blocked.
TripMode activates itself on networks where you used it before. No need to fiddle in menus.
See how much data was used per app and per session, day, or month. Spot the data hungry apps.
However protected your Apple Mac is, it is always safe to have a firewall application installed, for none of us wants our personal data to be leaked. Firewalls are important, it does not matter which app you choose to install, just having one for basic security is enough.
15 June 2021
Best overall: Little Snitch
Best value: Lulu
Easiest to use: Radio Silence
Most powerful: Murus
Best balance of cost and features: Vallum
Before buying a firewall for your Mac, you first have to decide whether you actually need one. Instinctively, you might think so. But macOS comes with a firewall built in - and by default, it’s turned off. Has Apple lost its mind or something?
The answer is ‘something’. Specifically the fact that Mac users generally don’t need any extra firewall software to be enabled. That’s partly due to the fact macOS doesn’t run services that listen for network connections. On top of that, your router will also have its own firewall, so in most cases you don’t need any extra protection. The combination of these factors is why Apple doesn’t make a big deal about the macOS firewall.
But there are times when a firewall app can be a handy thing to have on your Mac. One such case is when you’re connected to a public network - for example, if you hook your MacBook up to wi-fi in a hotel. In that scenario, you might be at risk of poor security or even a fake network.
Another good reason to use a firewall is to control which Mac apps can connect to the internet. That includes malware, which may try to send your data to hackers. The macOS firewall isn’t built to do this, but it is possible with PF (Packet Filter), macOS’s more advanced firewall that can only be controlled via the Terminal command line. If you want something more user friendly, you’ll need a third-party firewall.
Install Little Snitch, and whenever an app tries to connect to the internet, you’ll get a notification. You can then choose whether to allow the connection or to block it. And you can apply that decision once, or until you restart your Mac, quit the app or log out. You can also set it for a certain period of time or permanently.
When you choose to block or allow an app access to the internet, Little Snitch creates a rule. You can then edit these rules in the Little Snitch client. These rules are based not only on the app that’s trying to connect to the internet but also the domain it’s trying to connect to. So you could allow an app to connect to certain servers but not others.
Using Little Snitch’s built-in Network Monitor, you can view and analyze any processes that are showing network activity. And you want to avoid notifications, you can run Little Snitch in Silent Mode, which will allow or deny all connections. Although the focus is very much on outgoing connections, Little Snitch can also control incoming connections to a lesser degree.
The only snag is the price. It’s a little expensive but worth it if you need total control.
Little Snitch at a glance:
Pros: Lots of options that put you in control
Cons: A bit pricey and maybe too advanced for beginners
Price: From $45 for a single license
Trial: 30-day demo
Developer: Objective Development
Official website:obdev.at
Lulu works in pretty much the same way as Little Snitch. When it’s enabled, you receive notifications whenever an app tries to connect to the internet. You can then block or allow the connection, either temporarily or permanently. Lulu can either apply the rules based on processes or on the domain level.
After that, you can head into the app to edit your rules. As well as changing the block or allow status, you can delete rules altogether or add domains or ports to the rules. You also get a network monitor, so you can keep an eye on what Mac apps are doing what in real-time
Make no mistake: Lulu doesn’t offer the same level of control as in Little Snitch. But it also doesn’t cost $45. In fact, it costs nothing at all. It’s a completely free, open-source app.
Lulu is only meant to block outgoing connections, but you could pair it with the macOS firewall if you’re worried about incoming connections. It can run in a few different modes: Passive, Block and no icon. Block stops all traffic, while passive applies only existing rules.
Lulu at a glance:
Pros: Does a good job and is completely free
Cons: Not much control over temporary rule
Price: Free
Trial: N/A
Developer: Objective-See
Official website: objective-see.com
Firewall For Mac
As its name implies, Radio Silence doesn’t make a big fuss. There are no notifications, prompting you to block or allow apps to access the internet. Instead, this stripped-back app does two things: it enables you to see what apps and processes are running on your Mac, and it lets you block them.
Free Network Firewall
Once you’ve blocked an app, you go into the settings and delete the rule. But that’s pretty much it. You can’t edit the rules in any way, and you can’t apply them under set conditions. Apps are either allowed to go online or they’re not.
Although limited, Radio Silence is ideal if you only want to block one or two apps and allow everything else through. Plus it’s cheap, with a single licence costing just $9. Pay $49 for the team licence, and there’s no limit on users.
Radio Silence at a glance:
Pros: Simple and cheap
Cons: Very basic blocking features
Price: From $9
Trial: 24 hours
Developer: Juuso Salonen
Official website: radiosilenceapp.com'
Just like Little Snitch and Lulu, Vallum intercepts outgoing connections from your Mac’s various apps. But you can also set rules for inbound activity too.
When an app tries to connect to the internet, you get a notification. As with Little Snitch, you can apply rules once, forever or for preset times, like five minutes, the rest of the day or until reboot You can also configure elements of your rule, like target hostname or IP, port, protocol, and even the user. Once a rule has been created, you can edit and apply more advanced criteria. Stick to the basics, though, and it’s not difficult to use Vallum effectively.
Vallum’s interface is a little confusing, but it’s a powerful app, and it comes at a great price. Starting from $15 for a single licence, it’s much cheaper than Little Snitch, despite sharing many of the same features. It can also be bundled with its sister app, Murus, a powerful front-end for macOS’s built-in firewall and Packet filter.
Vallum at a glance:
Pros: Powerful despite the relatively low price
Cons: A bit confusing to get set up
Price: From $15
Trial: Unlimited trial, with popup reminder every four hours
Developer: Murus.it
Official website:vallumfirewall.com
Murus is much more than just a simple connection blocker. The free Lite version only deals with inbound connections, but upgrade to Murus Basic or Pro, and it’s a completely different ball game. Not only can you configure rules for inbound and outbound connections, you have access to advanced filtering, port management, bandwidth management and much more.
If anything, Murus Pro is too powerful. The number of features and settings in the pro version is dizzying. While some users may benefit from features like port knocking, adaptive firewall, NAT and so on, most ordinary uses risk being overwhelmed. The Network Filter Configuration wizard helps a bit, though. And to be fair to Murus, it’s much easier to use than typing commands into Terminal.
Provided you know what you’re doing, though, Murus Pro is definitely worth checking out - especially as it comes with Vallum bundled in with it. It’s certainly not for the light-hearted, but if you want serious control over your Mac’s inbound and outbound connections, Murus Pro could be right for you.
Before you buy either Murus Pro or Vallum, though, you should know Murus.it has also released a hybrid firewall app called Scudo. This is designed as an alternative to both Muros and Vallum. At the moment, it’s in beta, so you might want to wait for a full release before buying it.
Murus Pro at a glance:
Pros: A rich feature set at a good price
Cons: Possibly too complicated for beginners
Price: From $10
Trial: Unlimited trial, with saving disabled
Developer: Murus.it
Official website: murusfirewall.com
What to look for in a Mac firewall
When choosing a Mac firewall, one of the first things you should consider is what you need it for. Key things to think about include:
- Whether you want to control inbound, outbound, or both types of connection. The macOS firewall is focused on inbound connections, and you need to use Terminal commands or a third-party app if you want to do more.
- Ease of use. If you can set up new rules without digging through tons of different menus, that’s ideal. More advanced software is great, but if you don’t know what you’re doing, it’s only likely to confuse you.
- How much control you get over rules. Some apps only let you block apps, with no more options than that. Others enable you to see more specific rules, like particular domains that are blocked or allowed.
- Cost. If you’re happy with the features in a free or low-cost firewall for your Mac, why spend more?
Which Mac firewall is the best in 2021?
Because Mac users don’t usually need firewalls to protect them from inbound connections, application-level firewalls that stop outbound connections are generally the best choice. Little Snitch is excellent but expensive. Radio Silence, meanwhile, is cheap and easy to use but offers limited control. Vallum does a good job too, and it’s substantially cheaper than Little Snitch. For many people, however, Lulu is more than good enough, and it’s completely free.
That said, none of these Mac firewalls are overly expensive, and they’re all great in their own particular ways. They all have free trials, and we strongly recommend trying them out before making a purchase.
FAQ
Do Mac owners need to use a firewall?
Free Firewall Macos
Usually, no. That’s why the built-in one is turned off by default. macOS isn’t generally vulnerable to rogue incoming connections, and most people have a firewall enabled on their router anyway.
How do you enable the macOS firewall?
To turn on the macOS firewall, head to System Preferences, and select Security & Privacy. Click the Firewall tab, then click the padlock near the bottom. Enter your username and password, so you can make changes in System Preferences. Now click Turn On Firewall. You can configure it by clicking the Firewall Options and Advanced buttons. You can also control Packet Filtering using text commands in Terminal.