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linux user auto login and NAT

Hi all:

I have a PC in my home with winxp, rhel-3 installed on it. Now I used IP forwarding in my rhel so that my father can use my broadband connection.
Now the problem is:

I put the iptables script at the /etc/rc.d/rc.local and it also executes at boot but dont work until I login and executes the script again. though I gave permission of that script 777.
As my father is not that aware of linux stuff :) obviously so for him I want to make the login prompt automatic for this reason and then he has to run that script which is very tedious for him.

Waiting for your reply.

you should have no need to add scripts anywhere. you should use the iptables service to control iptables rules, and enable ip forwarding via /etc/sysctl.conf

My linux box has 2 NIC one for internal 192.168.100.10 and one for external.
My other PC has IP 192.168.100.20 and can use internet though my pc.
I have this setup in my router linux box.
I have enable auto login by editing /etc/inittab but still after I have run the script to make 2nd pc use internet although its written in rc.local.

/etc/rc.d/rc.local file:-
-------------------------

Code:



#!/bin/sh 

#

# This script will be executed *after* all the other init scripts. 

# You can put your own initialization stuff in here if you don't 

# want to do the full Sys V style init stuff. 

touch /var/lock/subsys/local 

/etc/rc.d/rc.ipmasq

/etc/rc.d/rc.ipmasq :-
----------------------

Code:

#!/bin/sh 

IPTABLES=/sbin/iptables 

$IPTABLES -F -t nat 

$IPTABLES -A POSTROUTING -t nat -o eth1 -j MASQUERADE 

echo 1 > /proc/sys/net/ipv4/ip_forward

I also used this command to make it executable
# chmod /etc/rc.d/rc.ipmasq
and then #/etc/rc.d/rc.ipmasq to enable network sharing.

Thanks in advance.

ok, well my advice still stands...

OK, thanks.
One more thing, is there any way to know what IP is accessing my NAT, using how much bw, and anything about caching overflow on my NAT server if using a Large amount of user?

thanks.

well netstat / lsof will list open connections, if that's all you're after. what do you mean by caching overflow? squid poxying or something? that'd be at a different app specific level.