Comodo Internet Security

Comodo Internet Security

4.5 stars

Editor's Rating


User Rating

6 6



personal firewall and antivirus Comodo Internet Security (formerly Comodo Firewall) combines Comodo AntiVirus with a personal firewall that filters ingoing and outgoing traffic on your computer. It alerts you of any applications that attempts to connect to the Internet and allows you to permanently or temporarily allow or block the connection. Advanced users can customize the application and TCP/IP rules based on IP address, protocol and destination port, however this is not required unless you have a reason to customize the rules. In addition to application behavior and network connections, Comodo Firewall also monitors components (dll files etc.) that initiate network connections, as well as parent processes and modifications to executables (checksum verification). Other features include attack prevention (port scanning, flooding), adjustable security levels, trusted networks, activity log and more. The firewall and antivirus features can be installed individually, you do not have to install both. Copyright

FYI: This program offers to install promotional or third party software. Installation of these components is optional but you should pay attention during setup to avoid installing unwanted software. Read our policy.

Product Details

Publisher Comodo Inc (5) Price Free (paid upgrade available)
Version  history Last updated Mar 31, 2021
File Size 5.44 Mb Requirements None

User Reviews

5 stars72% 54
4 stars13% 10
3 stars9% 7
2 stars2% 2
1 star1% 1
Based on 74 reviews

Latest user reviews:

Slows down the system 3 stars by dawnskies Aug 08, 2017 (Read all my 9 reviews)
Great to have this free, but slows down the system loads. show Review details
Most complete protection out there - and free 5 stars by mikesantana Nov 18, 2015 (Read all my 25 reviews)
Been using this for many years, and the latest version is very complete, and now very easy to use. Very few people will need to vary from the default settings, and the "help" is good if you really want to know. Comodo runs a very active forum, and it is clear that they do respond to it, and have taken on board the comments in the version improvements. On an old slow PC, it will impact performance at times, but (unless very old) shouldn't discourage you from giving it a try. You can certainly live without the paid upgrade features (mentioned by another reviewer) but this year I chose to do it because it's not a lot of cash, and I felt I owed Comodo! Actually did use the interactive "Geek Buddy" help that comes with that, and it certainly saved some time - upgrading to Win10 had left a few problems lying around - not just with Comodo though... show Review details
5 star product 5 stars by rkowensiv178 Sep 04, 2014
Works great on win xp.... vista... 7... and 8... best freeware protection... I have used Comodo Internet Security for more than 4 years now never a problem. show Review details
Read all 74 user reviews...