Preventing Unauthorized Access
1647-008
This section describes the security measures on how to prevent unauthorized access from the external network. This is
a must-read for all users and administrators before using this machine, other printers, and multifunction machines
connected to the network. In recent years, a printer/multifunction machine connected to the network can offer you a
variety of useful functions, such as printing from a computer, operating from a computer using the remote function,
and sending scanned documents via the Internet. On the other hand, it is essential to take security measures to
reduce the security risk for information leakage, as a printer/multifunction machine has become more exposed to
threats, such as unauthorized access and theft, when it is connected to the network. This section explains necessary
settings you need to specify to prevent unauthorized access before using a printer/multifunction machine connected
to the network.
Security Measures to Prevent Unauthorized Access from the External Network
Assigning a Private IP Address(P. 7)
Using Firewall to Restrict Transmission(P. 8)
Specifying the TLS Encrypted Communication (P. 8)
Setting PIN to Manage Information Stored in the Multifunction Machine(P. 8)
Assigning a Private IP Address
An IP address is a numerical label assigned to each device participating in a computer network. A "global IP address" is
used for the communication connecting to the Internet, and a "private IP address" is used for the communication
within a local area network, such as a LAN in the company. If a global IP address is assigned, your printer/
multifunction machine is open to the public and can be accessed via the Internet. Thus, the risk of information leakage
due to unauthorized access from external network increases. On the other hand, if a private IP address is assigned,
your printer/multifunction machine is closed to a local area network and can be accessed by only users on your local
area network, such as a LAN in the company.
Global IP Address
Can be accessed from the external network
Private IP Address
Can be accessed from the users within a local area network
Basically, assign a private IP address to your printer/multifunction machine. Make sure to confirm the IP address,
assigned to the printer/multifunction machine you are using, is a private IP address or not. A private IP address is
found in one of the following ranges.
Ranges for Private IP addresses
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From 10.0.0.0 to 10.255.255.255
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From 172.16.0.0 to 172.31.255.255
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From 192.168.0.0 to 192.168.255.255
For information on how to confirm the IP address, see Setting IPv4 Address(P. 31) .
●
If a global IP address is assigned to a printer/multifunction machine, you can create a network environment
to reduce the risk of unauthorized access by installing security software, such as a firewall that prevents
Setting Up
7
Summary of Contents for imageCLASS MF735Cdw
Page 84: ... Menu Preferences Network Device Settings Management On Setting Up 76 ...
Page 164: ...Basic Operations 156 ...
Page 181: ...5 Select Apply LINKS Basic Operation P 128 Basic Operations 173 ...
Page 223: ... Sending and Receiving Faxes via the Internet Using Internet Fax I Fax P 247 Faxing 215 ...
Page 323: ...Sending I Faxes P 248 Scanning 315 ...
Page 326: ...LINKS Checking Status and Log for Scanned Originals P 301 Scanning 318 ...
Page 329: ...LINKS Using ScanGear MF P 322 Scanning 321 ...
Page 352: ...6 Click Fax Fax sending starts Linking with Mobile Devices 344 ...
Page 358: ...Updating the Firmware 437 Initializing Settings 439 Managing the Machine 350 ...
Page 434: ...LINKS Remote UI Screen P 420 Managing the Machine 426 ...
Page 436: ...5 Click Edit 6 Specify the required settings 7 Click OK Managing the Machine 428 ...
Page 609: ...5 Select Apply Maintenance 601 ...
Page 623: ...Troubleshooting 615 ...
Page 721: ... Import Export of the Setting Data See Setting Menu List P 442 Appendix 713 ...
Page 727: ...Appendix 719 ...
Page 767: ... 18 MD4 RSA Data Security Inc MD4 Message Digest Algorithm ...