Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Lets find the exact ports Crash Plan is using, and open only those ports for incoming AND outgoing traffic , on each computer or workstation that needs to use crashplan.
This page will help you identify the ports
If you cant find the port, or you are unsure how to allow tcp and udp for incoming and outgoing connections, in windows firewall for a specific port, let me know.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.
Understood, Remember the concept here is we only open just the ports that are needed for crash plan..
That way your firewall is still up, but the program is allowed through.. If you run into any issues let me know.
What exact version number of crash plan are you using on the server, and workstations?
Thank you , and my apologies for the delay.. I was off during the day shift today and have just started the night shift..
I have a bit of catching up to do and once finished, Ill try to break down the needed steps in an easier to follow message.