Re: IPsec through NAT Mode

[Jason Opperisano <opie@817west.com>]

On Mon, Nov 22, 2004 at 02:41:57AM -0800, Nilesh wrote:
> Hello All, 
> 
> I am using Squid proxy and IPtables. I am having some
> problems to configure firewall. 
> The problem is SNAT rule If I put rule in script I am
> able to connect VPN server at outside world but could
> not block yahoo messengers by squid without SNAT rule
> I can block messenger through squid. 
> I have checked VPN connection properties there is
> check box IPsec through NAT mode . If I uncheck I wont
> able to connect 
> SNAT Rule 
> $IPTABLES -t nat -A POSTROUTING -o $EXTIF -j SNAT --to
> $EXTIP

if you only need SNAT for VPN traffic, how about just SNAT-ing traffic
destined for the VPN server?

  $IPTABLES -t nat -A POSTROUTING -o $EXTIF -d $VPN_SRV \
    -j SNAT --to $EXTIP

-j

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