TweakDUN : Java Glossary

Was a free program that let you fine tune the way TCP/IP (Transmission Control Protocol/Internet Protocol) works, e.g. the MTU (Maximum Transmission Unit) packet size. It also provided a convenient editor for the hosts. file which maps DNS (Domain Name Service) names to IP (Internet Protocol) numbers. However, its main function was keeping the IPs in the hosts file up-to-date. 

• In Windows W95, W98 and Me, your hosts. file lives in C:\Windows\hosts.
• In Windows NT and W2K, your hosts. file lives in C:\WINNT\system32\drivers\etc\hosts.
• In XP, W2003, Vista, W2008, W7-32, W7-64, W8-32, W8-64, W2012, W10-32 and W10-64, your hosts. file lives in C:\Windows\system32\drivers\etc\hosts.

TweakDUN would automatically find it for you and automatically update entries. You put entries in the hosts. file either because they are not real DNS names, (e.g. 127.0.0.1 localhost ), or because you use them so often you want fast lookup, e.g. google.com or mindprod.com.

Unfortunately TweakDUN had serious bugs (If ever it failed to find a name on lookup, all subsequent lookups of good names fail as well and it did not work on Vista). The author lost all interest in supporting the product and then the website itself went south.