is using a different subnet then router A
and i thnik you will have to set up router A STATIC
which i would just use a bridge or three routers or a switch
using a firewall router as the main gateway
then branch off to the other 2 routers from it
or a switch from the main gateway to lan a lan b
or a bridge between the main gateway to lan a lan b
just make sure to use different subnets for each node
this can be done buy using actual routers or buy using
an old computer set up as a dhcp running router software
and a couple of nic cards
and i would use vpn (create a preshared key and encrypt it then paste in preshared key box if your equipment supports vpn)from the main gateway to lan a and b just for added protection this will create a vpn between the main gateway and the other nodes only from the front side of the main gateway to the internet will not be a vpn connection but from the back side of the gateway to lan a and b will communicate using vpn making it hard for unsecured attempts to pass through BRIDGES are good
for security also as it is hard to navigate across them
which cuts out 85% of all hackers dead in there tracks
the other 15% that can do this dont even waste there time cause there allready to busy WORKING!!!!!!
A perplexing problem
Company has its own Intranet
Company has a router connected to it's LAN "A" Intranet for access to
the Internet, and gets it's WAN IP as dynamic from it's ISP
The LAN "A" IP address's are served from it's router on it's Intranet
This is a typical set up, we all have done.
Now I need to add a new LAN "B" that has it's own IP address scheme
This new LAN "B" will use ALL nailed IP's
This is simple enought....
However I need a gateway to allow LAN "B" to send email
to users on LAN "A".
And have a way to allow assigned people on the Internet to Access
a web server located on LAN "B"
LAN "B" will be connected to LAN "A" using a router that will
get it's WAN IP Address from the router on LAN "A" as dynamic
Is this possible ?