Hello. I am building a Firewall and have some questions about how to implement
it. The basic firewall is a FreeBSD box running squid for transparent proxy,
IPFW for dummynet to rate limit syn's, and IPF as my main statefull packet
filter. The problem I have is with putting this into production. I have a T1
to the internet, the routers IP address is 172.16.1.1(well not really but it
works for the example) and all of the computers on the LAN are in the 172.16.1.0
(once again..only for the example) network. So here I get to the
question....is there any way to set the firewall with the same IP address as
the router to make the install fairly transparent to the users? Could I set
the firewall up as 172.16.1.1 and use NAT to let it communicate with the router
for internet traffic? How would I set up my routing tables? Also if anyone
has any input as far as how I am building my firewall that would be very
appreciated.
Thank you,
Mason
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