Epson 802.11g Reference Manual page 199

7. The following screen appears. The address you set here
becomes the port for Internet printing. Make the settings
described below.
Enter Printer URI:
Enter the target device's URI (up to 127 characters). The URI
you set here must be the same as the IPP URL you set for the
IPP configuration in EpsonNet Config. Do not use the
following characters; | \ [ ] { } < > # " `
Format: http://IP address of device:631/printer name
Example: http://192.168.100.201:631/EPSON_IPP_Printer
Use Proxy:
When using a proxy server, select this box and enter the Proxy
Server Name and Port Number. All communication is done
via the proxy server.
Enter Proxy Server Name:
Enter the proxy server name or the IP address of the proxy
server (up to 256 characters). Do not use the following
characters; | \ [ ] { } < > # " `
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