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Old 07-08-2004, 01:16 AM   #1
hariiyer
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how to configure ip masquerading


hi

My configuration is like this- RH-9 with 2 network cards. One is for internal and one is for internet. I am useing cable modem. My problem is that

1) how i will share my internet (ip masquerading and squid proxy).

please let me know asap

hari
 
Old 07-08-2004, 02:22 AM   #2
RINO2004
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http://monmotha.mplug.org/

here you can find a lot of information
 
Old 07-08-2004, 04:51 AM   #3
hasnain
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Ip masquerading

helloo


well wat i have understand is that u want to shareyour internet connection to more then one system on a single line...

command is as follows

[root@localhost root] ifconfig eth0:1 192.168.0.1 netmask 255.255.255.0 up


regards
 
Old 07-08-2004, 06:56 AM   #4
Capt_Caveman
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Re: Ip masquerading

Quote:
Originally posted by hasnain

[root@localhost root] ifconfig eth0:1 192.168.0.1 netmask 255.255.255.0 up
That would be how to give a network adapter a second (virtual) IP address.


@hariiyer
To setup masquerading, as root enter into the commandline:

iptables -t nat -A POSTROUTING -o ethX -j MASQUERADE

You'll also need to turn on port forwarding (echo "1" > /proc/sys/net/ipv4/ip_forward) and setup forwarding rules to allow traffic to pass between the two interfaces. Something like this should work:

iptables -A FORWARD -i ethY -o ethX -j ACCEPT
iptables -A FORWARD -i ethX -o ethY -m state --state ESTABLISHED,RELATED -j ACCEPT

Where ethX is your external interface (connected to internet) and ethY is the internal interface (connected to your internal LAN).
 
Old 07-16-2004, 10:45 AM   #5
kmashraf
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That's easy !

Just get hold of 'Firestarter' and install it. http://firestarter.sourceforge.net/
Couple of mouse clicks and voila, you have you have your Firewall and IP Masquerade up and running.
Another ways is get to http://projectfiles.com and get the firewall script from there and soon enough you'll have a Firewall and IP Masq up and running.
I can assure you no sweat at all.
But you wanna dirty your hands and write your own custom IP tables script with NAT (IP Masquerade) go right ahead. But first beef up on the IPTables HOWTO. Good starting point http://iptables-tutorial.frozentux.n...-tutorial.html
 
Old 07-16-2004, 10:53 AM   #6
ppuru
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If your just want to configure linux to act as a Internet gateway, get a hold of SmoothWall Express 2.0. (As you are in India, the CDs accompanying the current issue of PCQuest has SmoothWall Express 2.0).

The installation and configuration are a breeze.

Last edited by ppuru; 07-16-2004 at 10:54 AM.
 
  


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