Technical information

Network Security White Paper ver. G.1.2
Page 20 of 72
1-8-3 Recommended precaution
Scenario 1:
Basic security settings - Change the usernames and password from the default value and the
passwords for each user to something difficult to guess and change it regularly.
Scenario 2:
Standard security settings - Encrypt all data.
Scenario 3:
High security settings - Disable the SNMP v3 service.
If it is not absolutely necessary, the SNMP v3 service should be disabled via Web Image Monitor or the
mshell.
Scenario 4:
Very high security settings - Close the SNMP v3 port.
If it is not absolutely necessary, the SNMP port should be closed via Web Image Monitor or the mshell.
1-9 SHELL (RSH/RCP)
1-9-1 Function Overview
The Remote shell (RSH/RCP) service provides the following functions via TCP port 514. This is typically
used from a UNIX/Linux client.
• Printing jobs from RSH/RCP clients
.
• Monitoring machine status and settings.
• Obtaining the print logs and the system logs.
• Transferring scan data to the Twain driver.
1-9-2 Potential Threats and Recommended Precautions
Destruction, Corruption and Modification of the File System
Access is read-only.
Possibility of Acting as a Server for Relaying Viruses
Because access is read-only, this situation is very unlikely.
Theft of Username and Password
All data is sent in clear text. However, no password is required for access to RSH/RCP. SFTP is
recommended in most situations.