Network Setup
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If an Ethernet port is experiencing difficulties auto-negotiating with another device,
Ethernet Speed and duplex may be set manually.
On rare occasions it may be necessary to change the Ethernet hardware or MAC
Address of your CyberGuard SG appliance. The MAC address is a globally unique
address and is specific to a single CyberGuard SG appliance. It is set by the
manufacturer and should not normally be changed. However, you may need to change it
if your ISP has configured your ADSL or cable modem to only communicate with a device
with a known MAC address.
Interface aliases
Interface aliases allow the CyberGuard SG appliance to respond to multiple IP
addresses on a single network interface. This is useful for when your ISP has assigned
you a range of IP addresses to use with your Internet connection, or when you have more
than one subnet connected to a single network interface.