Re: NAT suggestions

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#75

From: Mark Addinall
Date: Fri, 29 Nov 2002 22:05

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Giles Harney wrote:
> I did a search for NAT for linux and was swamped with all the results and
> options.
> 
> I would like to ask your suggestions on what to use for a NAT solution on
> Redhat 8.0.
> 
> Thanks,
> -Giles
> 
> 


-----------
#!/bin/bash
# start NAT
# requires iptables NOT ipchains.  check kernel

# is it there? die otherwise

modprobe ip_tables

# turn on the semaphore

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

# get rid of anything pending.  this only really becomes
# important if the comms stack or an application abends.

iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain

# set up IP Masquerading
# interface is still ppp.  no DSL in the bush :-(

iptables --table nat --append POSTROUTING --out-interface ppp0 -j MASQUERADE

# set up IP Forwarding
# Dave and co come in on eth0

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

# now start to customise your table rules, or install
# firewall.  This will get you up and running quickly
----------------

Have fun,

Mark Addinall.

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