Netopia 4000 Series, Руководство пользователя программного обеспечения

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Security 10-1
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The Netopia Firmware Version 5.4 provides a number of security features to help protect its configuration
screens and your local network from unauthorized access. Although these features are optional, it is strongly
recommended that you use them.
This section covers the following topics:
■ “Suggested Security Measures” on page 10-1
■ “Console Tiered Access – Two Password Levels” on page 10-2
■ “User Accounts” on page 10-15
■ “Telnet Access” on page 10-17
■ “About Filters and Filter Sets” on page 10-18
■ “Working with IP Filters and Filter Sets” on page 10-26
■ “Policy-based Routing using Filtersets” on page 10-34
■ “Firewall Tutorial” on page 10-37
■ “Configuration Management” on page 10-44
■
“Call Filtering” on page 10-48
Suggested Security Measures
In addition to setting up user accounts, Telnet access, and filters (all of which are covered later in this chapter),
there are other actions you can take to make the Router and your network more secure:
■
Change the SNMP community strings (or passwords). The default community strings are universal and
could easily be known to a potential intruder.
■
Set the answer profile so it must match incoming calls to a connection profile.
■ Leave the Enable Dial-in Console Access option set to No.
■ Configure the Netopia Firmware Version 5.4 through the serial console por t, if available, to ensure that your
communications cannot be intercepted.