Specify the Default Time to Live for TCP/IP Packets (Windows NT/2000/XP)

Registry Guide for Windows
Part of the WinGuides Network

Registry tweaks, tricks & hacks to optimize, enhance and secure Microsoft Windows.

Specify the Default Time to Live for TCP/IP Packets (Windows NT/2000/XP)
Category: Home > Network > Protocols > TCP-IP

This tweak can be easily applied using WinGuides Tweak Manager.
Download a free trial now!

Specifies the default Time To Live (TTL) value set in the header of outgoing IP packets. The TTL determines the maximum amount of time an IP packet may live in the network without reaching its destination. It is effectively a limit on the number of routers an IP packet may pass through before being discarded.

Open your registry and find the key below.

Create a new DWORD value, or modify the existing value called 'DefaultTTL' using the settings below.

Exit your registry, you may need to restart or log out of Windows for the change to take effect.


		DefaultTTL	REG_DWORD	0x00000080 (128)


	HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters

Settings:

System Key: [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters]
Name: DefaultTTL
Type: REG_DWORD (DWORD Value)
Value: 1-255 hops

Related Tweaks

Specify the Default TCP/IP Time to Live (Windows 95/98/Me)

Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.

Last Modified: May 13, 2002

Return to Index