basic linux hardware setup

["Stuart Clark" <sclark () spacelink com au>]

Hi,

Should i have two network cards in my linux firewall machine?
one which goes to the Cisco, which is connected to the outside world.
eg eth0 on firewall 61.12.109.2 255.255.255.254 CONNECTED TO Cisco
61.12.109.1 255.255.255.254

and the other network card going to my internal machines

eth1 on firewall 10.0.0.1 255.255.255.0 CONNECTED TO internal machines
(Will the change to private addressing effect DNS, Webservers, News, Mail?)

OR

can i use only one card in the firewall machine on the same subnet as all
the machines
eg eth0 - on firewall 61.12.109.2 255.255.255.0 CONNECTED TO cisco
61.12.109.1 255.255.255.0
mailserver 61.12.109.3 255.255.255.0  webserver 61.12.109.4 255.255.255.0
etc...

OR

should i use 2 cards in the firewall machine on the same subnet
eth0 - on firewall 61.12.109.2 255.255.255.0 CONNECTED TO Cisco 61.12.109.1
255.255.255.0
eth1 - on firewall 61.12.109.3 255.255.255.0 CONNECTED TO mailserver
61.12.109.3 255.255.255.0  webserver 61.12.109.4 255.255.255.0  etc...


Regards
Stuart Clark

-------------------------------------------------
"Nobody will ever need more than 640k RAM!"
                           -- Bill Gates, 1981
"Windows 95 needs at least 8 MB RAM."
                           -- Bill Gates, 1996
"Nobody will ever need Windows 95."
                           -- logical conclusion
-------------------------------------------------


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