Posted 11-10-04
After installing Service Pack 2 for Windows XP you will probably find that your VPN client no longer works!!
A fix has now been identified that will allow the VPN client to work; you will need to add the following registry key….
HKLM\System\CurrentControlSet\Services\IPSec\AssumeUDPEncapsulationContextOnSendRule
= REG_DWORD
The value data should be set to equal 2.
You can reset the behaviour to Default SP2 by changing the Value to “0”.
A value of “1” will only enable a Client with a public (i.e.non-NAT’d) address to connect to a NAT’d server.
The value of “2” enables both public and NAT’d clients to connect to a NAT’d server.
The value of “2” is equal to the pre-SP2 behaviour.
You can download the Registry key HERE
- (Right click and select ‘Save Target As… rename to XP_SP2_VPNfix.reg’)
NOTE… XP sp2 seems
to rename .REG files to .MP3!! …
When you click the
‘Save’ button, rename the file to ‘XP_SP2_VPNfix.reg’
You can then double
click the file to install the required keys.