Re: what's the problem of DNAT,It seems there is a HIDE firewall

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Thank you, but I don't think so

Now I found that It seems have a HIDE firewall, the firewall just only
allow the access from internet at port 80, and will deny  access at
all the other ports.
And I can access to the internet address( the firewall's machine like
211.211.112.11) at any port that the firewall have a DNAT RULE, but i
can't access it except port 80 from internet.
It just like the firewall just allow the access at 80 from internet,
but I don't set the firewall, It like it's burn with the machine. I
promise I didn't set that firewall, and I have checked my rule that It
doesn't drop other ports access

2005/10/31, Henrik Nordstrom <hno@xxxxxxxxxxxxxxx>:
> On Mon, 31 Oct 2005, Buddy wu wrote:
>
> > And there is another Interest thing (I'm pained with the "interesting thing")
> > where I use 'sbin/iptables -t nat -A PREROUTING -d Inet2 -p tcp
> > --dport 8087 -j DNAT --to 192.168.16.100:8087' rule, I can access
> > http://Inet2:8087 in the LAN, but I can't access http://Inet2:8087
> > through Internet(I have a machine direct access to internet)
>
> Please verify the routing on 192.168.16.100. To me the data you have
> indicates 192.168.16.100 does not have correct routing for the Internet.
> From what I have seen the iptables rules is correct, but all your rules
> with NAT to 192.168.16.100 is failing.
>
> Quite likely the NAT and firewall rules as such is working just fine, but
> 192.168.16.100 does not know what to do with the return traffic.
>
> Regards
> Henrik
>



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