Request timeout - Pinging Remote sites from Corp

Hello, I am the programmer at our office but have been tasked with dealing with a network problem.  We have a cisco vpn 3000 concentrator.  We also have a constant ping going to all of our remote ipaddresses.  This has been working for a while.  However, i suddenly discovered that all of the ipaddresses (about 20) are returning the message "Request TimedOut"  instead of "Reply".  I tried pinging them individually and rebooting the main router and vpn concentrator. That did not work.  Can someone help me identify what I can do to trace and resolve this?   Thanks.

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windows xp? XP firewall would do it.
MahonekAuthor Commented:
I'm not sure what this answer means.  Are you saying that all 20 or 30 remote computers had a windows firewall issue at the same time.  All of the computers are located around the country.
Are they using windows firewall? are they on a domain?
if they are it could have been enabled, which does block ping.

alternatively, is ping allowed through the VPN tunnels?
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Was there any FW(Firewall) or router implemented at theiir end, that is blocking ICMP? or proto1 or ping.

or the machines running xp2 with the firewall on?

is ping/icmp/proto1 allowed through the vpn tunnels?

any of the above would stop your requests/replys
MahonekAuthor Commented:
It seems to have been the Default Gateway IP on the server that was running the pinging bat file.  It was not the same as the VPN gateway IP.  
So I moved the pinging bat file to another server that has the same gateway IP as the VPN gateway IP and it seems to be working fine.  Thanks for all the help, I appreciate it.

PAQed with points refunded (250)

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