What is hosts?

Benefits & Restrictions

How to use Hosts

Read these notes

Get the Hosts file

Hosts for Macintosh

Hosts for Linux




GDS Hosts News




Released November 12, 2000


It was released in April 2002, and is version 1.34.

You may find more information and download it from here or here until I update this page.

The information for the older version and the downlink link for the older version can still be found below. Thank you for your patience while I update the site for the new version.




DNSKong Version 1.0.6
Copyright 2000, Pyrenean
email Pyrenean

DNSKong is free for individuals for personal non-commercial use.
Commercial users contact Pyrenean for license details.

DNSKong counter:

What is DNSKong?

DNSKong is a personal caching-only psuedoDNS server. DNSKong only serves the localhost. No machine from the outside world will be able to use your DNSKong.

It uses the file, named.txt as rules for matching DNS queries to the local IP address, The rule heuristic for this version is first "complete-dotted-octet" match.

For example, if named.txt contained the line: com
then all names containing com between any dots in the name would match to This would include www.anything.com, com.com.com, or ads.hereorthere.com.  Using com as a line in the filter will block any .com

DNSKong uses the file, pass.txt, as exceptions to the rules in named.txt. The rule heuristic for this version is first "complete-dotted-octet" match.

For example, if pass.txt contained the line: com
then all names all names containing com between any dots in the name would pass DNSKong's named filter and would be resolved by your other Domain Name Servers for resolution. This would include www.anything.com, com.com.com, or ads.hereorthere.com.

If you do not have a named.txt file or the file is empty all names will pass DNSKong's filter.

If you do not have a pass.txt or the file is empty DNSKong will make no exceptions to the named.txt rules.

DNSKong's menu items allow you to start and exit the program, load the filterlists, edit the pass and block lists, hide and unhide the tray icon, check version information and view the readme file.
DNSKong's tray menu items allow you the many of the same features as the start menu. DNSKong 1.0.6+ allows you to choose the location of your filter folder. You can also configure DNSKong 1.06+ to server as a DNS proxy and you may also obtain IP configuration information about your computer.

After installing DNSKong you must configure your system to use as the first Domain Server. The file, tcpipreg.reg contains the registry entries needed; however, manual configuration is the best method to use. For help on how to perform manual configuration consult:

You must keep the configuration files named.txt and pass.txt in the same folder as DNSKong.exe


  1. We don't care what you filter. This DNSKong distribution includes only one keystring in named.txt, www.pyrenean.com. Using DNSKong as distributed will only filter the Pyrenean web site. We hope you will remove that entry, but you can filter anything and everything you want.
    Inclusive set of rules for different purposes may be gathered from domain names in publicly available hosts files. The rule file approach, named.txt, is much smaller than a matching hosts file. The rule search resolves a domain name to when it first finds a matching entry in named.txt.
  2. The rules are predictive. Use minimal names for named.txt and specify exactly the names you want to pass DNSKong. This is the exact opposite of the approach you would take with hosts.
  3. With DNSKong, you don't need hosts. You can use hosts with DNSKong. You machine checks Hosts first, then DNSKong, then your other Domain Name Servers.
  4. DNSKong is compatible with web proxies or proxy servers. Your browser will route its request through your proxy server before your machine looks up an entry in Hosts or DNSKong. Your proxy configuration is processed first. You need to use a personal web server to avoid missing pictures or web pages that your proxy or web browser expects from
  5. DNSKong forces IE5.0+ to cache Domain names so once you've resolved a name the browser will not need to requery the DNS for some time. If you decide to remove an entry from named.txt after a displaying a web page you will need to exit your browser prior to being able to see the matching web page.
  6. Performance of DNSKong should be similar to performance using Hosts.  Performance is important and depends on many factors. For example, smaller filters will give DNSKong better overall performance, just as a small Hosts file speeds up Hosts lookups.
  7. You will experience minor browser differences using DNSKong rather than hosts. In general, DNSKong filters more than hosts. Hosts only filters specific names, DNSKong filters names that contain any match from the named.txt file.
  8. DNSKong nows offers DNS proxy support. You can use this option to select 5 DNS servers that DNSKong will use to lookup domain names provided the names are not filtered. If you do not use this option you will not need to allow DNSKong access to the internet under ZoneAlarm. If you choose to use this option you will need to configure ZoneAlarm to allow DNSKong access to the Internet. This feature can be used to proxy to a DNSKong Enterprise server and may not offer any performance improvement over your current network configuration. If you use the feature you can determine that DNSKong has proxied a name request by the tray icon which will have the upper kong-block gray and the two lower kong blocks green when a name has been proxied. Some machines need to have a priming operation prior to proxying DNS lookups through DNSKong. The easiest way to prime the proxy is to use the command-line ping or tracert command to a known domain name.
  9. If using the proxy fill the entries from top to bottom. This feature is included with this release in order to permit chaining DNSKong personal servers to DNSKong enterprise servers. You may also use genuine DNS servers if you would like to the extend the number of available Domain Name Servers for your machine.

DNSKong only is available to the local machine, so even without a firewall machines will not be able to access your DNSKong. Contact Pyrenean to get a server version of DNSKong that will allow a single machine to act as a DNSKong server. On personal machines, firewalls should be configured to allow local only access for DNSKong and block Internet access to DNSKong.

Configuration can be difficult. For reference on how to do this consult the tutorials "Controlling DNS Lookup Sequence" referenced by hyperlink above.

The idea is to set up your machine to use as the first DNS Server.

On NT/9x and WinMe, use Network properties to examine TCP/IP protocol settings. Add as your first DNS entry.

Win2K requires more effort. The network Internet TCP/IP properties dialog does not like as a DNS Server address. The advanced properties button can be used to add as the first DNS on the list. You most likely will need to disable the DNS Client. You will need to reboot your machine after making the DNS entry and disabling the DNS Client service. Your Win2K machine may act differently than our test computers. This procedure has worked on the few Win2K machines that we have available for testing.

If you run a firewall continue to do so. You may be able to configure your firewall to block DNSKong access from the Internet. If you use ZoneAlarm, you may need to first pass the block when ZA asks for the first time about DNSKong. Then immediately open ZA's configuration and disallow access.

Some users may need to add as a machine on the local net for ZA. Use the security tab and look in the Advanced features button to add this address. The IP is a Universal IP reserved for the local machine.

System Requirements: Win9x, Win2k, Winme, NT
Internet requirements: if hosts works - DNSKong will work
Version: 1.0.6 beta release
File size: 163KB
File name: DNSKNG106.exe
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