Offer Remote Assistance Error on Laptops

[Guest]

I have a number of Dell Latitude D600 laptops running Windows XP Pro with
both SP1 and SP2. I am unable to Offer Remote Assistance to any of the
laptops, I receive the error "Remote server machine does not exist or is
unavailable" as soon as I try to connect - there is no problem offering
remote assistance to desktops!

I have a group policy set up to enable Remote Assistance and the following
exceptions for SP2 firewall blocks:
%systemroot%\system32\sessmgr.exe
%systemroot%\pchealth\helptctr\binaries\helpsvc.exe
Port - TCP 135

I have searched Microsoft and other forums - is there something else that I
am missing?

Thanks in advance for any help!

 

[Mark L. Ferguson]

forward port 3389 to the IP of the remote machine behind a firewall.


..

 

[Guest]

Not sure I understand - machines on a local area network - no firewall in
between

 

[Guest]

Forwarded port - still get the same error message "Remote server machine does
not exist or is unavailable"

 

[Mark L. Ferguson]

875357 - Troubleshooting Windows Firewall settings in Windows XP Service Pack 2:
http://support.microsoft.com/default.aspx?kbid=875357

Windows Firewall and Logs in Windows XP Service Pack 2: http://www.microsoft.com/technet/community/columns/cableguy/cg0204.mspx


..

 

[Guest]

I do not feel this is SP2 related - I still have a number of laptops that are
still SP1 that get the same error message and if I turn the firewall off on a
laptop with SP2 still the same thing.