Getting problem in Static Routing in Debian

drpaudel · 08-28-2012, 02:39 AM

I am newbie to Linux networking.
I have 2 NICs in Debian host. eth0 is running DHCP and its setting is

Code:

allow-hotplug eth0
iface eth0 inet dhcp

eth1 is running in static IP and setting is as below

Code:

auto eth1
iface eth1 inet static
address 192.168.0.1
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255

Problem
eth0 is getting dynamic IP and internet is okay.

I am connecting my Client PC via eth1 having IP 192.168.0.2 Now I need to add proper route. Where and what shall I require to add route in order to access internet service in my Client PC. Is there anything more remaining things to be done.

eSelix · 08-28-2012, 11:13 AM

To enable routing you need to make a command

Code:

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

But with your configuration you also need a NAT. Because addresses 192.168.*** will not be routed to Internet, it is for private local networks. For enabling NAT, you need to add iptables rule:

Code:

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

And FORWARD ACCEPT rules in filter table if you use it. By default, I think, all is accepted - you should change this if you have other connected clients you want to not be routed. These commands need to be executed after every boot, so write them on starting script, for example /etc/rc.local.

drpaudel · 08-29-2012, 03:01 AM

It work fine. Thank you eSelix