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ShieldsUP is an online port scanning service created by Steve Gibson of Gibson Research Corporation. The purpose of the utility is to alert the users of any ports that have been opened through their firewalls or through their NAT routers, which can be used by malicious users to take advantage of security vulnerabilities. The utility scans the most common file sharing ports, as well as all service ports (1-1056), and user defined ports, in sets of 64.[1]

It is often recommended for checking port vulnerabilities.[1][2][3][4][5][6][7]

The scanning servers have the static IP addresses of to[8]

See also[edit]


  1. ^ a b Ho, Erica (April 7, 2010). "ShieldsUP Tests Your Firewall for Vulnerabilities". Lifehacker. Retrieved December 13, 2018.
  2. ^ Horowitz, Michael (December 5, 2015). "Test Your Router". Router Security. Retrieved December 13, 2018.
  3. ^ Hoffman, Chris (April 9, 2013). "How to Test Your Antivirus, Firewall, Browser, and Software Security". How-To Geek. Retrieved December 13, 2018.
  4. ^ Horowitz, Michael (January 27, 2014). "How and why to check port 32764 on your router". Computerworld. Retrieved December 13, 2018.
  5. ^ Price, Dan (May 19, 2015). "ShieldsUP: Firewall Vulnerability Test Tool". MakeUseOf. Archived from the original on January 23, 2017.
  6. ^ Ellison, Craig (March 15, 2006). "For Home Networkers". PC Magazine. Retrieved December 13, 2018.
  7. ^ O'Donnell, Andy (October 24, 2018). "How to Test Your Firewall". Lifewire. Retrieved December 13, 2018.
  8. ^ Gibson, Steve. "ShieldsUP! — Internet Vulnerability Profiling". Gibson Research Corporation. Retrieved December 13, 2018.

External links[edit]