If you have run our Online Port Scan and want to understand the results, this page will help. If you have not, then you should do run the firewall test now, it’s free and will tell you what ports may be open and vulnerable!
Our online port scan tests will scan a number of ports located at your IP address (this is what your computer uses to communicate on the internet). Our tests are straight forward, and should report open ports, stealthed or not.
In a nutshell, programs/services listen and communicate over ports; investigating these ports can tell you what might be running on your computer. If a virus makes its way to your system, say sub7 (popular and dangerous), that virus may listen on port 27374.
When you perform one of our online port scans, we check for those ports and attempt to tell you what program or virus is commonly associated with that online port. Whether or not we are able to associate a program or virus with the open port, you should still investigate!
An easy way to start your research is by using one of the search engines, say Google, and search for the port that was reported open, say ‘port 27374’ – including the word ‘port’ with the number will help. In this example, you’ll find results pointing to the Sub7 virus.
Online Port Scans
We offer three types of online port scans, they are:
- Trojan Scan – option 1
- Full Scan – option 2
- Advanced Scan – option 3
Our online Trojan Scan checks for services listing on ports that are commonly associated with viruses.
Our Full Port Scan check every port in the range you select. Because there are over 65,000 ports, we have created ranges to help you determine open ports. The default range is a basic online scan that covers ports 1-2500. Most basic services use the first 2,500 ports.
The Advanced Port Scan allows the user to select the ports they would like scanned. This is much faster the a full fledged port scan.
Online Port Scan Considerations
Here are a few things to keep in mind:
- Trojan scans often check just the ports used by popular Trojans or viruses. If a new Trojan is released, or if the Trojan is ‘smart’, it will listen on a not-so-popular port. A Trojan scan, no matter how many Trojans are checked, may miss this new port.
- Full online port scans check all the ports, not just the popular ones. If you have the time, you should check all your ports.
- Trojans/viruses can listen on the same ports used by many non-Trojan programs and visa-versa, so always verify your findings.
- The best way to protect yourself is to install an antivirus program and use a firewall.
- Our online scans should not be considered 100% accurate, we do our best at promoting security awareness by giving you fast, free information you can use in the process of securing your system.
IMPORTANT: Because our online port scan checks multiple ports, your system administrator or security software may interpret our scan as a vulnerability scan. Your software may then block any future port scans by us and produce false readings. For example, if we scan the ports 1-2500 and your system blocks us out, your next scan of say, 2500-5000 will show that these ports are closed when in actuality, you may have an open port.
Our scans come from IP address 184.108.40.206