Iptables
From Tomelec
Revision as of 19:12, 17 September 2011 by Tom (talk | contribs) (Created page with "== Share Internet connection creating a NAT == Sometime it´s handy to share an Internet connection with other network devices. For example to dial in using an UMTS modem and the...")
Sometime it´s handy to share an Internet connection with other network devices. For example to dial in using an UMTS modem and then getting a second computer (client) on the LAN port online.
- enable IP forwarding
- create a simple NAT
echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
ppp0 is the network device with an Internet connection. Important notes:
- the LAN port for the client´s network must have an IP address set
- clients must have an IP address within the same subnet of course
- clients must have a default route set
- clients should have a manual DNS server entry
