[wplug] Router issue

[Tom McCullough]

James O'Kane wrote:

>In addition to what some other people have said, I can give a bit of 
>insight why what you're hoping to do might not work. I'm going to call the 
>WAN side of the linksys 5 and the IP you want for your server 8. 
>In the normal case, the firewall responds when people on the WAN side ask 
>'Who has IP 5?' and your firewall reponds, "I do, here is my mac address" 
>This is Address Resolution Protocol (ARP). When someone asks "Who has IP 
>8?" Your firewall needs to respond with its mac address so the sender 
>knows where the packet should go. 
>In a bigger world/network, you would have a range of IP addresses, and the 
>sender (normally another router) would have a static route on their end 
>saying that anything for the 1.2.3.0/24 network should be sent to your 
>firewall. In that case, your firewall need not respond to ARP for all of 
>the addresses. 
>
>As someone else mentioned, you can either put a hub between the DSL modem, 
>and you're two computers, or take a linux machine and put it where your 
>firewall is and have it respond to both addresses with ethernet interface 
>aliasing. For example:
>/sbin/ifconfig eth0 192.168.1.1 
>/sbin/ifconfig eth0:1 192.168.1.2
>
>That would make eth0 respond to arp requests for both addresses.
>
>
>Hope that was helpful to someone.
>
>-james
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If you are going to the installfest Saturday, I will be bringing a 
linksys  BEFSR41 4-port router with me.  It has the latest firmware from 
their website.  I have some questions about it myself, and we can hack 
away at it as long as it will reset after we're done!
hope to see you there.
Tom.............................