3Com OfficeConnect 3C16771, User Manual, Page: 130 / 182

130 C
HAPTER
6: T
ROUBLESHOOTING
G
UIDE
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If you are using the Internet Firewall with a cable
modem, you may need to register the MAC address of
the unit with your cable service provider before
connecting the Internet Firewall to your network. You
can find the MAC address of the Internet Firewall on a
label on the underside of the unit.
Internet Firewall Does Not Save Changes
If the Internet Firewall does not save the changes that you
make, make sure that you click
Update before moving to
another window or tab, or all changes are lost.
Duplicate IP Address Errors Are Occurring
If there are duplicate IP address errors after you have
installed the Internet Firewall:
■
Try restarting the router or LAN machines.
■
Make sure the LAN is not connected to the WAN port
on the Internet Firewall.
■
If DHCP is on, make sure no other DHCP servers are on
the LAN.
Machines on the WAN Are Not Reachable
Make sure the Intranet settings in the Advanced section are
correct.