TCP/IPv4 Settings

This section describes the procedure for setting TCP/IPv4 using the control panel. After specifying the settings for TCP/IPv4, follow the procedure in "Settings Common to TCP/IPv4 and TCP/IPv6" to specify the required settings, and the procedure in "Confirming TCP/IPv4 Settings (PING Command)" to check whether the network settings are correct. If the settings for TCP/IPv6 are already specified and you have finished specifying the settings common to TCP/IPv4 and TCP/IPv6, only check the network settings after completing this procedure.

If you want to use IPv6 communications at the same time, follow the procedure in "TCP/IPv6 Settings" to specify the required settings, and the procedure in "Confirming TCP/IPv6 Settings (PING Command)" to confirm the settings.

Press

Press [Preferences] → [Network].

Press [TCP/IP Settings] → [IPv4 Settings].

Press [Use IPv4] for [IPv4 Settings] → [On] → [OK].

If you select [Off] for <Use IPv4>, IPv4 networks cannot be used, regardless of the settings specified for IPv4 on the Settings/Registration screen. The ARP (Address Resolution Protocol) table is also disabled.

Press [IP Address Settings] for [IPv4 Settings] → specify the following items → press [OK].

Using a fixed IP address:

Automatically obtaining an IP address:

Using a fixed IP address:

Press [IP Address] → enter the IP address.

Press [Subnet Mask] → enter the subnet mask.

Press [Gateway Address] → enter the gateway address.

Set [DHCP], [RARP], and [BOOTP] to 'Off'.

IMPORTANT
It takes about two minutes to check whether the DHCP, BOOTP, or RARP settings can be used. If you do not plan to use one of these settings, it is recommended that you turn them off.

Automatically obtaining an IP address:

Set one of [DHCP], [RARP], or [BOOTP] to 'On'.

Press [IP Address] → enter the IP address.

Press [Subnet Mask] → enter the subnet mask.

Press [Gateway Address] → enter the gateway address.

IMPORTANT
If this information cannot be obtained via DHCP, RARP, or BOOTP after you restart the machine, enter [IP Address], [Subnet Mask], and [Gateway Address] to use the settings entered in this step.

NOTE
If the machine is restarted after DHCP, BOOTP, or RARP settings are specified, the TCP/IP Settings screen displays the IP address setting values obtained from the DHCP, BOOTP, or RARP server. (If the IP address, host name, and domain name have been previously set, these will be overwritten by the setting values obtained from DHCP, BOOTP, or RARP.) If you use DHCP without the DNS dynamic update function, it is recommended that an identical IP address be assigned to the machine at all times. (If the IP address is not identical, the host name for the machine will not correspond to the IP address.)

NOTE

If the machine is restarted after DHCP, BOOTP, or RARP settings are specified, the TCP/IP Settings screen displays the IP address setting values obtained from the DHCP, BOOTP, or RARP server. (If the IP address, host name, and domain name have been previously set, these will be overwritten by the setting values obtained from DHCP, BOOTP, or RARP.)

If you use DHCP without the DNS dynamic update function, it is recommended that an identical IP address be assigned to the machine at all times. (If the IP address is not identical, the host name for the machine will not correspond to the IP address.)

If you set [DHCP] to 'On' in [IP Address Settings], specify the DHCP option settings. If you set [DHCP] to 'Off', proceed to step 8.

Press [IPv4 Settings] for [DHCP Option Settings] → specify the following settings → press [OK].

[Acquire Host Name]	You can automatically obtain the host name from the DHCP server.
[DNS Dynamic Update]	You can automatically register the IPv4 address, host name, domain name set for the machine in the DNS server using dynamic DNS updating. A dynamic DNS server is required for using dynamic DNS updating.

Press [Up].

Press [DNS Settings] for [TCP/IP Settings] → [DNS Server Address Settings].

Specify the following settings in <IPv4> → press [OK].

If you want to use dynamic DNS updating, enter the IPv4 address of the DNS server in [Primary DNS Server].

If you do not want to set up a secondary DNS server, enter <0.0.0.0>.

IMPORTANT
If you set [BOOTP] or [DHCP] to 'On' in step 5, the IP address of a DNS server you set manually will be overwritten.

10.

Press [DNS Host/Domain Name Settings] for [DNS Settings] → specify the following items in <IPv4> → press [OK].

If you want to use dynamic DNS updating, it is necessary to set a host name and domain name.

Host Name: Press [Host Name] → enter the name of the machine → press [OK].
Domain Name: Press [Domain Name] → enter the name of the network domain the machine belongs to → press [OK].

IMPORTANT
If you set [BOOTP] or [DHCP] to 'On' in step 5, the host name and domain name you set manually will be overwritten.

11.

Press [DNS Dynamic Update Settings] for [DNS Settings] → specify the following items in <IPv4> → press [OK].

If you press [On] for <DNS Dynamic Update>, you can automatically register the IPv4 address, host name, and domain name set for the machine in the DNS server using dynamic DNS updating. A dynamic DNS server is required for using dynamic DNS updating.

NOTE
If you have a DHCP server running Windows Server 2003 that uses the DHCP service and want to register the machine's DNS record, configure the following settings in the DHCP server: In the DHCP server, right-click the [Scope] icon → click [Properties]. In the [DNS] sheet of the displayed dialog box, select [Enable DNS dynamic updates according to the settings below] → [Dynamically update DNS A and PTR records only if requested by the DHCP clients]. In the Active Directory environment, right-click the icon of the DHCP server you are using → select [Properties]. In the [Advanced] sheet of the displayed dialog box, click [Credentials]. In the [DNS dynamic update credentials] dialog box, enter the user name, domain, and password for the Active Directory. If you have a DHCPv4 server running Windows Server 2008 that uses the DHCPv4 service and want to register the machine's DNS record, configure the following settings in the DHCPv4 server: In the DHCPv4 server, right-click the [Scope] icon → click [Properties]. In the [DNS] sheet of the displayed dialog box, select [Enable DNS dynamic updates according to the settings below] → [Dynamically update DNS A and PTR records only if requested by the DHCP clients]. In the Active Directory environment, right-click the icon of the DHCPv4 server you are using → select [Properties]. In the [Advanced] sheet of the displayed dialog box, click [Credentials]. In the [DNS dynamic update credentials] dialog box, enter the user name, domain, and password for the Active Directory.

NOTE

If you have a DHCP server running Windows Server 2003 that uses the DHCP service and want to register the machine's DNS record, configure the following settings in the DHCP server:

In the DHCP server, right-click the [Scope] icon → click [Properties]. In the [DNS] sheet of the displayed dialog box, select [Enable DNS dynamic updates according to the settings below] → [Dynamically update DNS A and PTR records only if requested by the DHCP clients].

In the Active Directory environment, right-click the icon of the DHCP server you are using → select [Properties]. In the [Advanced] sheet of the displayed dialog box, click [Credentials]. In the [DNS dynamic update credentials] dialog box, enter the user name, domain, and password for the Active Directory.

If you have a DHCPv4 server running Windows Server 2008 that uses the DHCPv4 service and want to register the machine's DNS record, configure the following settings in the DHCPv4 server:

In the DHCPv4 server, right-click the [Scope] icon → click [Properties]. In the [DNS] sheet of the displayed dialog box, select [Enable DNS dynamic updates according to the settings below] → [Dynamically update DNS A and PTR records only if requested by the DHCP clients].

In the Active Directory environment, right-click the icon of the DHCPv4 server you are using → select [Properties]. In the [Advanced] sheet of the displayed dialog box, click [Credentials]. In the [DNS dynamic update credentials] dialog box, enter the user name, domain, and password for the Active Directory.

12.

Press [Up] → [Up].

13.

Press [Firewall Settings] for [Network] → [IPv4 Address Filter].

14.

Press [TX Filter] or [RX Filter] → specify the following settings.


[TX Filter]	[RX Filter]

By specifying the settings described below, you can filter received packets and transmitted packets using IPv4 addresses and improve security when sending and receiving data between your computer and the machine. The possibility of a third person gaining unauthorized access can be reduced by configuring the settings for [IPv4 Address Filter] in accordance with the environment you are using.

When filtering received packets and transmitted packets, you can set to allow or reject data transmission/reception between your computer and the machine. You can specify with whom you allow data transmission/reception by registering IPv4 address of a computer as an exception address.

In case of [RX Filter], you can register exception port number as well as the IPv4 address so that you can set which computers are allowed to use specific functions and which are rejected. For example, you can allow general users to print via print server and reject them to access to the Remote UI while administrators are allowed to use all functions.

Details of settings are shown below:

	<Use Filter>	<Default Policy>	Settings Required after Pressing [Register]
Allow data transmission with all computers, but not with specified computers.	[On]	[Allow]	Register IPv4 address or IPv4 address prefix you want to reject.
Reject data transmission with all computers, but not with specified computers.	[On]	[Reject]	Register IPv4 address or IPv4 address prefix you want to allow.
Allow data reception from all computers, but not from specified computers.	[On]	[Allow]	Register IPv4 address or IPv4 address prefix you want to reject. Register port number for functions you want to reject.
Reject data reception from all computers, but not from specified computers.	[On]	[Reject]	Register IPv4 address or IPv4 address prefix you want to allow. Register port number for functions you want to allow.
Allow data transmission/reception with all computers.	[Off]	-	-

NOTE
If data transmission/reception is attempted between the device, which has the IPv4 address/port number set to be rejected, and the machine, a block log will be generated. To display the block log, "Checking the Block Log." Information for the rejected port number is recorded in the block log only when using TCP/UDP. Port number is not recorded when using protocols which have no port number such as ICMP.

NOTE

If data transmission/reception is attempted between the device, which has the IPv4 address/port number set to be rejected, and the machine, a block log will be generated. To display the block log, "Checking the Block Log."

Information for the rejected port number is recorded in the block log only when using TCP/UDP. Port number is not recorded when using protocols which have no port number such as ICMP.

"If you want to allow/reject data transmission/reception with all computers but not with specified computers."

"If you want to allow/reject data transmission/reception with all computers."

If you want to allow/reject data transmission/reception with all computers but not with specified computers

Press [Register] → set the exception IPv4 address or IPv4 address prefix.


[TX Filter]	[RX Filter]

To specify a single IPv4 address: Press [Single Address] → enter an IPv4 address.

To specify a range of IPv4 addresses: Press [Address Range] → press [First Address] → enter the first IPv4 address → press [Last Address] → specify the last IPv4 address.

To set the IPv4 address prefix: Press [Specify Prefix] → press [Address] → enter the IPv4 address prefix → press [Prefix Length] → enter the prefix length.

IMPORTANT
You can register up to 16 IPv4 addresses, IPv4 address ranges, or IPv4 address prefixes. The value of [First Address] should be less than or equal to that of [Last Address]. If the usage of a protocol or print application is not permitted on your device, it cannot be used even after settings in [Firewall Settings] have been changed on your device. Configure the settings to permit the protocol or print application. If you enter '255' in [Prefix Length], no IPv4 addresses will be set. If you enter '0' in [Prefix Length], all IPv4 addresses will be set.

IMPORTANT

You can register up to 16 IPv4 addresses, IPv4 address ranges, or IPv4 address prefixes.

The value of [First Address] should be less than or equal to that of [Last Address].

If the usage of a protocol or print application is not permitted on your device, it cannot be used even after settings in [Firewall Settings] have been changed on your device. Configure the settings to permit the protocol or print application.

If you enter '255' in [Prefix Length], no IPv4 addresses will be set.

If you enter '0' in [Prefix Length], all IPv4 addresses will be set.

Press [OK] or [Next].

For [TX Filter], press [OK] → [OK] → proceed to step 16.

For [RX Filter], press [Next] → proceed to step 15.

If you want to allow/reject data transmission/reception with all computers

Confirm that [Off] is set for <Use Filter> → press [OK] → proceed to step 16.

15.

Set exception port number → press [OK] → [OK].

To specify all port numbers as exception: Press [Do Not Specify].

To specify port number individually: Press [Specify] → press [Add] and enter port number → press [OK].

IMPORTANT
You can register up to 16 port numbers for IPv4 addresses, IPv4 ranges, or IPv4 address prefixes. You can register 50 port numbers for one port number setting.

16.

Press [Close].