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How do I configure Internet access for my LAN using NAT?
V!CAS
Enable NAT
From this list, select the ISP interface you just configured.
Network Address Translation on
Now configure the types of incoming connections you want to allow.
Under
specify the internal host, and services to allow.
You might want to allow access to an FTP server on the LAN.
Service
ftp
Destination
<IP address of your FTP server>
Setup IP Routing
All that’s left to do now is to add a default route to your ISP.
Route Type
Default route
Network
WAN without transit network
Partner / Interface
<ISP interface name>
More Info
Additional Routing Settings
: Note that routing settings on some work-
stations on your LAN may need to be modified to include a default route
that specifies the LAN address of your V!CAS. Check your operating sys-
tem’s instructions to see what changes need to be made.
• On most UNIX workstations, you can add the route with:
route add default
<V!CAS’ LAN Address>
1
This may not be needed if the workstation understands RIP. It
will learn about new routes from the V!CAS every 30 seconds.
• On Windows 95 systems with Microsoft TCP/IP change “Prop-
erties–Systemcontrol–Network–TCP/IP-Properties–Gateway”
and add the V!CAS as the primary gateway.
Another option is to use Proxy ARP on the LAN. This can be configu-
red under:
(p. 59)
IP
Network Address Translation
ADD
(p. 55)
IP
R
OUTING
ADD
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CM-BNCTP, E
THERNET
A
DVANCED
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ETTINGS
