[NTLUG:Discuss] Need Network Configuration Advice.

[Bobby Wrenn]

You will need to run enable ip-forwarding in your kernel and run
ipchains. You seem to have the system set up correctly. 

In a recent post Chris Cox gave this minimum configuration:
As root do:
ipchains -A forward -j MASQ -s 192.168.X.0/24 -d 0.0.0.0/0
echo 1 >/proc/sys/net/ipv4/ip_forward

Replace X with your network identifier for your private net.
e.g. 192.168.4.0

This is a minimum configuration and provide no security. I will send the
script I use directly to you. I will need some tweaking for your system
but that should be easy.

Bob Byron wrote:
> 
> I am new to linux network administration and need some help.  I need to
> setup a network local network that has access to the internet.
> I have a linux system that I can use as a router.  The system
> has two ethernet cards in it, so I can use it as a bridge.
> 
> Internet ===|eth0 -- LINUX SYSTEM -- eth1|=== local network
> 
> Questions:
> 1) Is the best/most secure way to setup this type of system to
> have the linux system sit between the Internet and the local
> network?
> 
> 2) I am using 2 ethernet cards, is that best, or is one card as
> secure?
> 
> 3) How do I bridge eth0 with eth1?  (I am using Redhat 6.1.  I
> have been able to ping from eth0 to the internet and eth1
> to the local network, but I have not been able to ping the
> internet from my local network.  I assume there is some kind
> of bridge that I need to enable.)
> 
> Bob Byron
> RAD Systems, Inc.
> www.radit.com
> (972)516-4256
> 
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