Epson AcuLaser C8600 Reference Manual page 402

After installing EpsonNet WinAssist from the software CD-ROM,
make the following settings before configuring the network
interface.
1. Click Start, point to Control Panel, and then select Security
Center. Click Windows Firewall.
2. Click the Exceptions tab, and then click the Add Program
button.
3. Select EpsonNet WinAssist from the Programs list, and then
click OK.
4. Confirm that the check box for EpsonNet WinAssist is
selected in the Programs and Services list, and then click OK.
B. For EpsonNet WebManager Users
If EpsonNet WebManager is installed on the computer running
Windows XP Service Pack 2, make the following settings;
otherwise the client computers cannot access EpsonNet
WebManager.
1. Click Start, point to Control Panel, and then select Security
Center. Click Windows Firewall.
2. Click the Exceptions tab, and then click the Add Port button.
3. Enter the name of the port in the Name text box and 8090 in
the Port number text box, and then select the TCP radio
button.
Note:
If necessary, click the Change scope button and then specify the
IP addresses of the client computers for which the port is unblocked.
4. Click OK.
400 Notice for Windows XP Users