Automatic Updates your Host file

According to

The Hosts file contains the mappings of IP addresses to host names. This file is loaded into memory (cache) at startup, then Windows checks the Hosts file before it queries any DNS servers, which enables it to override addresses in the DNS. This prevents access to the listed sites by redirecting any connection attempts back to the local machine. Another feature of the HOSTS file is its ability to block other applications from connecting to the Internet, providing the entry exists.

You can use a HOSTS file to block ads, banners, 3rd party Cookies, 3rd party page counters, web bugs, and even most hijackers. This is accomplished by blocking the connection(s) that supplies these little gems.

Example – the following entry blocks all files supplied by that DoubleClick Server to the web page you are viewing. This also prevents the server from tracking your movements. Why? … because in certain cases “Ad Servers” like Doubleclick (and many others) will try to open a separate connection on the webpage you are viewing.

So how does, malware authors use the Host file to their benefit. According to, “The HOSTS file is the virtual equivalent of the phone company’s directory assistance. Where directory assistance matches a person’s name to a phone number, the HOSTS file maps domain names to IP addresses. Entries in the HOSTS file override DNS entries maintained by the ISP. By default ‘localhost’ (i.e. the local computer) is mapped to, known as the loopback address. Any other entries pointing to this loopback address will result in a ‘page not found’ error. Conversely, entries can cause a domain address to be redirected to a completely different site, by pointing to an IP address that belongs to a different domain. For example, if an entry for pointed to an IP address belonging to, any attempt to access would result in a redirect to

Malware authors are increasingly using the HOSTS file to block access to antivirus and security websites. Adware may also impact the HOSTS file, redirecting access to gain affiliate page view credit or to point to a booby-trapped website that downloads further hostile code.”

So you may download Hosts secure to automatically update your Hosts file. You will need to install .NET Framework 1.1 first to be able to use it.

‘Dilbert’ posted the download link on ComputerHope forum.

FYI, Spybot S&D also have utilities to protect your Hosts file too.

NOTE: You may not be able to access any/most ads on the websites you visited


2 Responses

  1. The best site I have visited yet, you rule

    people with screwy thoughts think like this:
    It is a pity, that now I can not express – I am late for a meeting. I will be released – I will necessarily express the opinion on this question.

  2. It would be nice to delete stupid comments like “One Response”, as it does not add anything useful to the problem, like here we are talking about a holstfile and this user talks about daugnuts…..

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