[ale] VPN / NAT question from meeting

[Scott Plante]

Thanks! 

----- Original Message -----

From: "George Allen" <glallen01 at gmail.com> 
To: "Atlanta Linux Enthusiasts" <ale at ale.org>, sp at scottplante.com 
Sent: Thursday, October 18, 2012 10:14:13 PM 
Subject: [ale] VPN / NAT question from meeting 

So, there was a question about sharing a VPN connection with a LAN 
through NAT. I believe something like this should work: 

echo "1" > /proc/sys/net/ipv4/ip_forward 
iptables -A FORWARD -i eth0 -d 10.0.0.0/8 -j ACCEPT 
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE 
sysctl net.netfilter.nf_conntrack_acct=1 

as referenced here: http://www.bloovis.com/wordpress/?p=219 

/break/ 

I haven't read through it all, but this looks interesting, with regard 
to building one's own tunnel: 
http://www.mad-hacking.net/documentation/linux/networking/ipsec/nat-vpn.xml 

Also, the Linux HOWTOs are kindof dated, but they're still good 
reading and reference: 
http://www.tldp.org/HOWTO/VPN-Masquerade-HOWTO.html 
http://www.tldp.org/HOWTO/NET3-4-HOWTO.html 
http://www.tldp.org/HOWTO/Networking-Overview-HOWTO.html 

Hope this helps, 
-George 
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