Tod Merley wrote:
Hi Doug!
Doing a similar thing in the interest of my LUG.
What follows is for Ubuntu Breezy but the issues are the same:
I used System>Administration>Networking to establish a static IP
(192.168.1.1 <javascript:dl('http://192.168.1.1',1);>) for the laptop
ethernet port (and to see that wlan0, the wireless port, was connected
to the proper AP and to know it's IP).
Instructions for setting up the dhcpserver I found at:
http://ubuntuguide.org/#dhcpserver
The iptables in Breezy come unset. Forwarding accomplished by:
# iptables:
# Delete and flush. Default table is "filter". Others like "nat" must be
explicitly stated.
iptables --flush - Flush all the rules in filter and nat tables
iptables --table nat --flush
iptables --delete-chain - Delete all chains that are not in default
filter and nat table
iptables --table nat --delete-chain
# Set up IP FORWARDing and Masquerading
iptables --table nat --append POSTROUTING --out-interface wlan0 -j
MASQUERADE
iptables --append FORWARD --in-interface eth0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward - Enables packet
forwarding by kernel
#
A friend of mine (Paul Edwards) added:
"The excellent "Firestarter" Gnome firewall software makes this an
incredibly simple and easy-to-do task with the nice user-friendly GUI.
"
Browsing appears normal (laptop or downstream), and use of the "apt-get"
"Synaptic" and other tools as well. However, I had to pull down the
Firestarter forwarding/firewall (iptables GUI) to enable the use of an
FTP server on the laptop (again, an Ubuntu box - I did get dual boot on
FC4 on this box yesterday but have not tried the NAT thing on FC4 there
yet) on its ethernet path to another desktop FC4 box on the ethernet
wire. I could ping everywhere and I could browse to the ftp server (
ftp://192.168.1.1 - the laptop ethernet port) from within the laptop but
no one on the wire could do the same.
Well, at least I am pretty well ready for the next public linux
technical session.
Cheers!
Tod
Hey thanks all for the great answers. Give me some time to process all
this good info and do some testing and I'll post what works for me.
Regards
Doug P
