Help with initial network setup for linux server in windows group

**Shinhan** · June 25th, 2010

After some help from dnsmasq mlist, turns out I need to remove "named" which I found out is from bind9 package so I removed that, and dnsmasq starts up normally now.

Internet connectivity solved thanks to http://www.tldp.org/HOWTO/IP-Masquer...-examples.html but since that guide is not for ubuntu I had to do some changes and I'm ignoring some kind of missing LSB information warnings. Oh well, at least its working now.

**critter.be** · June 25th, 2010

For starters, IP Forwarding must be enabled:

Code:

root@d530001:~# cat /proc/sys/net/ipv4/ip_forward 
0

0 = no IP forwarding, 1 = IP forwarding.
To enable it:

Code:

sysctl -w net.ipv4.ip_forward=1

To make sure your routing is active when rebooting, edit /etc/sysctl.conf
look for and replace:

Code:

net.ipv4.ip_forward = 1

I believe you may have forgotten the following rules:

Code:

iptables --append FORWARD --in-interface eth0 -j ACCEPT
iptables --append FORWARD --in-interface eth1 -j ACCEPT

And you may want to read up on iptables...

INPUT is for any inbound traffic on the interface
OUTPUT is for any outbound traffic on the interface
FORWARD if for any traffic routed by the machine

So your INPUT statement is only for traffic on the machine itself.

Have a look at this page: http://www.howtoforge.com/nat_iptables
Will.

**Shinhan** · June 25th, 2010

First I'm really thankful for that sysctl bit, the

Code:

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

that I was told by others works but looks like an ugly hack and I'm glad I know the proper way to enable ip forwarding.

Sorry I edited my previous message, should've refreshed but didnt so I didnt notice your reply.
The internet is working now, and like I mentioned in edit I used http://www.tldp.org/HOWTO/IP-Masquer...-examples.html. Since thats not for ubuntu I had to make some changes (I also removed the ip_forwarding thanks to you tip just now), and now after doing

Code: