Dear all, Thanks very much for your kindly help! I use below codes to update the firewall, and it works now.
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A PREROUTING -d 192.168.1.250 -p tcp -m tcp --dport 8080 -j DNAT --to-destination a.b.c.d:8181
iptables -t nat -A POSTROUTING -d a.b.c.d -p tcp --dport 8181 -j SNAT --to-source 192.168.1.250
At 2011-06-27£¬"John R Pierce" <pierce@hogranch.com> wrote:
>On 06/27/11 12:05 AM, muiz wrote:
>> [root@localhost ~]# /sbin/iptables -L
>
>note that doesn't show all the pertinent info. I prefer `iptable -L
>-vn`, and it still doesn't show the nat tables, you also need `iptable
>-L -vn -t nat` to see those chains, and `iptable -L -vn -t mangle` if
>you're using any mangle entries.
>
>
>
>--
>john r pierce N 37, W 122
>santa cruz ca mid-left coast
>