Network Problems

Check the following sections.
"Remote UI is not displayed."
"The printer port name is not displayed in [Print to the following port(s)]"
"The machine automatically connects to the wrong destination via the dial-up connection (when using a dial-up router)"

Remote UI is not displayed.

Check network connection.
"Checking connection"
Check whether the IP address of the machine matches the sub-network address of the computer's IP address. 
The machine's default settings have <DHCP> and <Auto IP> enabled, so it obtains an IP address automatically.
If the subnetwork addresses of the machine and the computer do not match, set the IP address of each device manually to have the same subnetwork address.
"Setting the IP Address"
You can check IP address of the machine:
"Checking IP Address Settings"
How to recognize general network addresses
When the subnet mask is set as "255.255.255.0", it is the same as the value which the rightmost IP address separated by a period is replaced with a "0".
Ex.:
IP Address: 192.168.127.123
Subnet Mask: 255.255.255.0
Subnetwork address of the above example: 192.168.127.0
You cannot configure connection beyond routers. Use it within the same segment (an environment which does not go beyond a router).
Make sure that <IPv4 Address Filter>, <IPv6 Address Filter> or <MAC Address Filter> is not specified for the machine.
If it is specified, change the setting so that IP address and MAC address of your computer can be permitted.
"Restricting Sending/Receiving to/from Specific IP Addresses"
"Restricting Sending/Receiving to/from Specific MAC Addresses"
Check to see if <SNMPv1 Settings> or <SNMPv3 Settings> is set to <Off> for the machine.
You may not be able to specify and browse each item of the machine from utility software that uses the SNMP protocol to obtain the information.Change <SNMPv1 Settings> or <SNMPv3 Settings> to <On>.
You can set <On> to both <SNMPv1 Settings> and <SNMPv3 Settings>.
When <SNMPv1 Settings> is set to <On>, the machine cannot be recognized when accessed from the utility software with a community name different from the machine setting. If it cannot be recognized, check your community name.
"Setting SNMPv1"
Make sure that <Dedicated Port Settings> is <On>.
"Setting the Dedicated Port"

The printer port name is not displayed in [Print to the following port(s)]

Make sure that the correct printer driver is installed to your computer.
When switched to wired LAN connection from the other method (USB connection), uninstall the MF driver.
Once installation is complete, reinstall the MF driver.
"MF Driver Installation Guide" 
Check the printer folder to make sure that the printing destination of the computer is set to the machine.

The machine automatically connects to the wrong destination via the dial-up connection (when using a dial-up router)

If the broadcast does not need to traverse the dial-up router, configure the dial-up router so that the broadcast does not traverse it. If the broadcast needs to traverse the dial-up router, run a check the dial-up router settings.
When a DNS server exists in the external network, specify the destination IP address instead of the host name. This also applies when the device to which you want to connect the machine and the machine exist on the same network.
When a DNS server and the machine exist on the same network and the device registered on the DNS server exists in the external network, run a check the settings.
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