Re: Nat and firewall holes

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On Monday 2010-03-22 16:46, ratheesh k wrote:

>We have machine called A , connected to LAN network and is assigned an
>ip 192.168.1.100 and its gateway is machine B's eth0 interface (
>192.168.1.1 ) .
>if i access "google.com " from machine A , syn packet with dest ip as
>a.b.c.d ( google.com ip ) and  dest port 80 will go to machine B
>(default gateway ) . Since we are masquerading all the packets , it
>will change  source ip with 192.168.55.1 and source port with some
>random port ( say portx ) . Packets from server will be having
>192.18.55.1 ip and port as portx . This will be changed to original ip
>and port by conntrack module .
>
> My qustion is : if i create a packet with source ip as 192.168.55.1
>and dest port as portx , can i get into the machine B from WAN side .

Yes.
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