Ricoh fi-8040 Operator's Manual page 223

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Is the IP address of the scanner used for other communication devices?
Solution
If there are multiple communication devices using the same IP address on the same network,
communication may fail. Avoid duplicates in IP addresses.
HINT
If there is an IP address conflict, a notification appears on the touch screen.
●
Have you connected another communication device with the same IP address as the scanner to the
server in the past?
Solution
Communication fails if you connect the scanner to the server and change the preferences
settings without turning off the server after the server communicated with another host or
communication device with the same IP address as the scanner. Restart the server.
●
Is there a firewall device between the scanner and the server?
Solution
Check that the access from the scanner is not prohibited by the firewall device.
●
Are the settings related to the proxy server configured correctly on the scanner?
Solution
Check the server setting items in the following procedure:
1
On the touch screen, press
[Proxy Server].
2
Check the setting items for the following.
● Whether [Enable] is correctly set to on/off
● Whether the following settings are correct when it is set to on
- Whether [Host Name/IP address] and [Port Number] are correct.
- Whether the setting for [Authentication] for a proxy sever is correct.
HINT
The server setting items can also be checked in fi Series Network Settings.
For details, refer to
→ [Scanner Settings] → [Network] → [Server] →
Network Settings (fi Series Network Settings) (page
223
Troubleshooting
359).