ensure that the port no's value is changed in the files ADMINDWCF.exe.config and globalwcfclient.config under the folder globalserver
for ex: if you are using port 8010 in the below line change the value to 8010 by default it is 8000
The best way to test if there's a port blocking is using telnet, Manuela try to close a telnet session from your Hub to your Satellite using the following command:
1- Open a DOS command prompt
2- Type: telnet Sat_hostname 8000
Where Sat_hostname is the hostname or ip address of your server, and port 8000 is the default port used by WCF. If the command prompt turn complete black your port is open, if you get an error message there's port blocking somewhere in your network.