Be sure that the TCP ports for communication and printing via TCP/IP are not being blocked by another program or by a server-side or client-side firewall.
Eingehend:
- 4000 for print jobs from a ThinPrint Engine
- 4001 for requests from a ThinPrint Client
- 4012 – 4014 (MultiCast) for traffic between several connection service hosts in a HA configuration