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Unknown Loopback Adapter

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I just installed Kerio Firewall today and ran across a possible problem. I found a loopback adapter labeled "N/A" in "Network and Security" catagory under the "Trusted Area" tab. I've never voluntarily installed a loopback adapter and I'm not aware of any software that asked me to do so. I am running some uncommon software that most people don't have installed. (Alcohol 120% for example)

Also, I have the "No Script" extention for Firefox and one of the blocked scripts is which relates to the loopback adapter.

I ran a full scan with Kaspersky and found nothing. Is there a possibility that a loopback adapter can be used by a third party for malicious purposes?
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Major Payne

Major Payne

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I use Zone Alarm and have listed. I also use YPops! so I can get my Yahoo! mail with Outlook Express. The only other one listed in the Trusted Zone by Zone Alarm is my wireless one. You may be using a similar program.

If you are still in doubt about it, I am sure your firewall will allow you to double/right-click on the item and change its permission. Zone Alarm persents a box to change from Trusted to Internet or Block. Even remove it.


What is is the standard IP address used for a loopback network connection.

This means that if you try to connect to, you are immediately looped back to your own machine.

If you telnet, ftp, etc... to, you are connected to your own machine.

In other words, is you.

For example, if your system was named "joker", and you attempted to telnet to, you would see:

# telnet
Connected to joker
Escape character is '^]'.

Convincing newbie's to connect to is a frequent joke on the Internet.

Another name for is localhost.

Hope this helps.

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    Je suis Napoléon!

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i'm not sure about your specific setup but the loopback is a diagnostics adapter on ALL machines...any machine with a network adapter has a loopback address (always't know why you'r has a specific port attatched to it..unless you have some software that allows for connection to a server in certain conditioins (some software is designed to interact with a server running a database or other software..but can be installed as a stand alone..the way they get around not having a seperate server is by pointing the software to the loopback when it's a local install...some times these programs when installed WITH a server will need a specific port assignment on the server computer to work properly..which could explain the port assignment on the loopback addy)
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