Internet Security Check

Get an Internet security check of your computer for free with these excellent security test utilities from Gibson Research Corporation.

On your Windows based PC check for your firewall with this free security test for leaks.

If you are having some security problems on a Windows OS computer and are looking for some tools to help you identify and possibly fix them, try some of these free security check utilities.

For a check of any computer connected to the Internet use Shields UP!. Some sample results from Shields Up! follow.

With a Linksys router installed between a PC and a DSL modem the computer connection received a clean bill of health from Shields Up!. If the report for your computer isn't as good, check our recommendations for some easy and inexpensive solutions.

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The Results of Shields UP! Checking a Computer's Internet Security with the Linksys Router on a DSL Line

"- Attempting connection to your computer. . . Shields UP! is now attempting to contact the Hidden Internet Server within your PC. It is likely that no one has told you that your own personal computer may now be functioning as an Internet Server with neither your knowledge nor your permission. And that it may be serving up all or many of your personal files for reading, writing, modification and even deletion by anyone, anywhere, on the Internet!"

"- Your Internet port 139 does not appear to exist! One or more ports on this system are operating in FULL STEALTH MODE! Standard Internet behavior requires port connection attempts to be answered with a success or refusal response. Therefore, only an attempt to connect to a nonexistent computer results in no response of either kind. But YOUR computer has DELIBERATELY CHOSEN NOT TO RESPOND (that's very cool!) which represents advanced computer and port stealthing capabilities. A machine configured in this fashion is well hardened to Internet NetBIOS attack and intrusion."

"- Unable to connect with NetBIOS to your computer. All attempts to get any information from your computer have FAILED. (This is very uncommon for a Windows networking-based PC.) Relative to vulnerabilities from Windows networking, this computer appears to be VERY SECURE since it is NOT exposing ANY of its internal NetBIOS networking protocol over the Internet."

The Results of Checking for Connectable Listening Internet Ports

"Results on all of the ports tested was: Stealth! There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address! . . . for all intents and purposes your computer doesn't exist to scanners on the Internet!"

"It means that either your computer is turned off or disconnected from the Net (which seems unlikely since you must be using it right now!) or an effective stealth firewall is blocking all unauthorized external contact with your computer. This means that it is completely opaque to random scans and direct assault. Even if this machine had previously been scanned and logged by a would-be intruder, a methodical return to this IP address will lead any attacker to believe that your machine is turned off, disconnected, or no longer exists. You couldn't ask for anything better."

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