We're (us & our consultants)able to see others end of the tunnel but they (consultants) are not able to reach the hosts they're after. What could have gone wrong as it use to work before. We've never done any changes to the firewall settings? What kind of a problem is this and how do I resolve it if it's firewall related? Note that the hosts the clients are trying to reach up and PINGable.
I have this problem too.