Registry Guide for Windows

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Home > Network > Protocols > TCP-IP

(Windows NT/2000/XP)
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.

This tweak can be easily applied using WinGuides Tweak Manager.
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Open your registry and find or create the key below.

Create a new DWORD value, or modify the existing value, called "DefaultTTL" and set it according to the value data 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\P...

Registry Settings

System Key: [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters]
Value Name: DefaultTTL
Data Type: REG_DWORD (DWORD Value)
Value Data: 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