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Thread: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

  1. #1
    eolithic Guest

    Default Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    Hello,

    ive got a few Questions:

    1. Why is it called Loopback Adapter?

    2. Im i better off deleting it or keeping it in my "Firewall Zone"

    3. Im using a very big Host file which is around 350 KB big and contains websites like this: 127.0.0.1 ad.de.doubleclick.net, now that za is setting it in into trusted zone... can sites like that harm me when i give other programs access or harm me at all?
    are there security risks using such an host file instead of the mainstream one while using za?

    I guess thats it... if i find some more Questions i edit them in.

    Operating System:Windows XP Home Edition
    Product Name:ZoneAlarm Pro
    Software Version:6.0

  2. #2
    billc Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    The Loopback Adapter (127.0.0.1), is used by your Computer/ Programs for testing or debugging system problems by sending data out and receiving it back at the source (ie.your own computer) without actually going out across a network or being physically connected to one. It should indeed be in the Trusted Zone. It is safe.

    Sites like 'doubleclick.net' are not harmful per se but do server up ads that may be annoying.

  3. #3
    albertf Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    Hi eolithic,Don't know if it'll be of any interest but maybe have a look at http://pgl.yoyo.org/adservers/index.php#hosts2bindand scroll to about one third down the page, you'll find a section titled "The Hosts File". Can't remember where it is but someone said in a posting to that site that they intentionally use a hosts file of about 9MB (Super Paranoia) ! So I wouldn't worry about yours being only 350kB (Standard Paranoia)! I use the one from Spybot Search and Destroy, it's only about 35kB (Mild Paranoia), seems enough to me!

  4. #4
    Join Date
    Mar 2004
    Location
    Brisbane, Australia
    Posts
    645

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    Normally the "hosts" file (no extension) is hidden and it is sort of like a local DNS server. Entries in the hosts file override DNS requests, so any internet site listed as having 127.0.0.1 as its IP address in the "hosts" file will always get "looped back" to your PC instead of going out to the real site.

    Some viruses will add IP addresses of 127.0.0.1 for virus checker update sites to prevent updates and some will even entirely rewrite the hosts file to point nearly EVERYTHING to the loopback device. This effective kills ANY internet access!

    SpyBot Search and Destroy will also add entries like this to the "hosts" file to block web sites that are known for "bad behaviour" like porn, gambling and spyware sites but ad.de.doubleclick.net is not one of them. However "Double-click" IS known spyware.

    If you run SpyBot S&D, you can find this option in the "Host File" page under the "Tools" sidebar menu option. You must be running in advanced mode.

    Now, while you are on that page, click the "pipe network" icon immediately to the left of the words "Hosts File" in the top dark grey bar - make sure you have your sound turned on! Can you move the knight to every square on the chessboard without going over a previously entered square? It can be done! Good luck.

  5. #5
    eolithic Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    Hello,

    sorry for the late reply but i had some real life issues, so i had no time to answer yet.

    thanks for the replys oh and: im using NoScript Extension @ FireFox and on all websites i visit it shows this stuff when i click on "Options...": Allow http://www.website.etc, then it shows this 127.0.0.1 stuff and i wonder if it has any purpose to keep it disabled or enable it?

    Thanks again.

  6. #6
    billc Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    If you have Mobile Code control turned on in your ZAP > Privacy > Main page settings, then there is no need to use the NoScript Extension in FF. I would suggest you keep it disabled and use ZAP for blocking scripts. You can then 'customize' sites you regularly visit.

  7. #7
    eolithic Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    if i allow scripts for a certain site all scripts are enabled then, no matter if its the websites, ads or that 127.0.0.1 i was talking about, does it make any sense allowing it or is it not needed at all to allow 127.0.0.1 @ NoScript, i had it blocked/default all the time without problems but id like to know if it has any use or ill should just keep it like that

  8. #8
    billc Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    Help me make sure I understand what you are saying. In your post, you said " if i allow scripts for a certain site all scripts are enabled then " which is not true with Zone Alarm. You can put your 'global' blocking on for all scripts then in your ZA > Privacy > Site List, add any site you wish to allow (unblock) scripts (or anything else) by customizing it keeping them blocked for other sites. I don't know if you can do that with the FF extension.

  9. #9
    eolithic Guest

    Default Re: Regarding Loopback Adapter 127.0.0.1(i used search button, but i got other questions)

    by all scripts i meant also 127.0.0.1 which gets blocked by NoScript.

    id just like to know if its useful to allow 127.0.0.1 scripts in anyway or should i just keep it blocked?

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