Visualizza wikitesto di Internet Sharing-EN

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== Prerequisites ==
* An internet connection (ethX/wlanX/pppX)
* Two network interfaces (ethX/wlanX)
* Ip forwarding enabled

== Cleaning ==
''Clean iptables rules''
<pre>
# iptables -F
# iptables -F INPUT
# iptables -F OUTPUT
# iptables -F FORWARD
# iptables -F -t mangle
# iptables -F -t nat
# iptables -X
</pre>

== Enable ip_forwarding ==
''Enable ip_forwading for the current session''
 # echo 1 > /proc/sys/net/ipv4/ip_forward

== NAT ==
''Nat connection''
 # iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE

{{Warning |In this sample ''eth1'' is the WAN interface, can be different, depending on your configuration!}}

== Script ==
''A scripted version of the previous commands''

{{Box File|internet_sharing.sh|
<pre>
# iptables binary
IPT="/sbin/iptables"

WAN="eth1" # Edit as need

# Clean iptables rules
$IPT -F
$IPT -F INPUT
$IPT -F OUTPUT
$IPT -F FORWARD
$IPT -F -t mangle
$IPT -F -t nat
$IPT -X

# Enable ip forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward

# Nat connection
$IPT -t nat -A POSTROUTING -o $WAN -j MASQUERADE
</pre>
}}

* Run with:
 # chmod +x internet_sharing.sh
 # ./internet_sharing.sh

[[Categoria:Documentation]]
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