Half-Open Limit Fix (short for HOLF) is free and effective patch from Russia specially designed for removing the maximum connection limitation of TCP/IP half-open. In consequence, it will effectively improve the concurrence ability of network packets (sending, receiving), and accelerate the transfer speed of multiple packets or small packet (to a certain extent, reduce the network delay).

Half-open limit fix is the most mature one in technology, and much safer to use - because it direct effects on the tcpip.sys system file to increase the number of maximum connections. Anyway, I guess a lot of users are still using the early Windows (especially Windows XP), so Half-open limit fix still has its place!

Supported OS

  • Windows XP SP1 (x64)/SP2 (x86,x64)/SP3
  • Windows Vista without SP (x86,x64) and with SP1 (x86,x64)
  • Windows 7 beta (x86,x64)
  • Support any language Windows
*** For Windows 7 SP1 and higher OS, this patch is not required at all, because these Windows versions have no limit of half-open connections quantity any more.

Simple Tutorial 

  1. Run Half-open limit fix
  2. Choose a new limit of concurrent half-open outbound connections quantity and press "Add to tcpip.sys" (for most Internet users, changing the limit to 100 will be more than sufficient)
  3. Restart computer and enjoy

Edition Statement

This is the Half-Open Limit Fix v4.2 Final portable version.

Related Links

Download URLs

Direct Fast Link Page (360 KB | Homepage)