« 3 »
Figure 1-2: ISA-4000 rear panel
The status LEDs indicate the following:
LED
MEANING
Act
Indicates transmit or receive activity. It is normally off. When there is
packet transmit or receive activity, this LED is on.
Link
Indicates whether the link is active or not. When lit, indicates that the
link is active. When off, indicates that the link is inactive.
For information on resetting the system, refer to 2.4 Resetting the
ISA-4000.
1.6 ISA-4000
S
ERVICES
The ISA-4000 provides nine main services, including:
•
Email server
•
Web server
•
File server
•
Web caching server
•
Basic firewall
•
DHCP (Dynamic Host Configuration Protocol) server
•
DNS (Domain Name System) server
•
IP masquerading (also known as NAT [Network Address Translation])
•
Mailing lists
These services are described in more detail in Chapter 4.
The ISA-4000 also offers an easy-to-use, browser-based, user-friendly interface, allowing users to
setup and administer the ISA-4000 in an intuitive way. The ISA-4000 GUI (Graphical User Interface)
has two groups of functions:
•
one group is for system administrators, and administers the ISA-4000 systems
•
one group is for users, and administers each user's personal account
More detailed information can be found in
Chapter 4: Administrator's Guide
, and in
Chapter 5:
User's Guide
.
1.7 C
ONFIGURATION
O
PTIONS
The ISA-4000 provides many scenarios for configuring your SOHO server environment, including
those shown as follows: