linux user auto login and NAT

tanveer · 03-17-2007, 11:27 PM

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.

acid_kewpie · 03-18-2007, 02:44 PM

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

tanveer · 03-19-2007, 02:21 AM

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.

acid_kewpie · 03-19-2007, 03:19 AM

ok, well my advice still stands...

tanveer · 03-19-2007, 09:22 PM

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.

acid_kewpie · 03-20-2007, 02:33 AM

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.