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I just want masquerading! Help!
This is what most people want. If you have a dynamically allocated IP PPP dialup (if
you don't know, you do have one), you simply want to tell your box that all packets
coming from your internal network should be made to look like they are coming from the
PPP dialup box.
# Load the NAT module (this pulls in all the others).
# In the NAT table (-t nat), Append a rule (-A) after routing
# (POSTROUTING) for all packets going out ppp0 (-o ppp0) which says to
# MASQUERADE the connection (-j MASQUERADE).
iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
# Turn on IP forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
Note that you are not doing any packet filtering here: for that, see the Packet
Filtering HOWTO: `Mixing NAT and Packet Filtering'.
#transparent proxy with squid
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128
#anschauen mit: iptables -L -t nat
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