User manual

Introduction
8
The other is the host PC's IP address, which is configurable through the host operating
system, identically to a regular NIC. This is the IP address that other PCs on the LAN
see. It should be dynamically (DHCP) or statically configured to use the same gateway,
DNS, etc. settings as a regular PC on the LAN.
Note
It is possible to configure the SG PCI appliance to run in masquerading mode. This is
discussed in the chapter entitled Firewall.
Secure by default
By default, all SG units run a fully secured stateful firewall. This means from the PC that
it is plugged into, most network resources are freely accessible. However, any services
that the PC provides, such as file shares or web services (e.g. IIS) are not be accessible
by other hosts on your LAN without further configuration of the SG unit. This is
accomplished using packet filter rules, for details refer to the Packet Filtering section of
the chapter entitled Firewall.
LEDs
The rear panel contains LEDs indicating status. The two LEDs closest to the network
port are network activity (upper) and network link (lower). The two other LEDs are power
(upper) and heart beat (lower).