iptables and NAT

[Jeff]

Jeff wrote:
> So far i've
> echo 1 > /proc/sys/net/ipv4/ip_forward
> to enable forwarding and restarted iptables, and saw
> Setting chains to policy ACCEPT: nat filter [OK]  - when i restarted.
> 
>  From some web searching and man iptables i deceided to try the following:
> 
> iptables -t nat -A PREROUTING  -p tcp  -s 192.168.2.81 --source-port 
> 3306  -d 192.168.2.81 --destination-port 3307 -j DNAT --to-destination 
> 192.168.2.81
> 
> Of course i've done something wrong, as i don't see this entry using 
> iptables -L
> 
Sorry to respond to my own post, but the rule is added.  i can see
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
DNAT       tcp  --  192.168.2.81         192.168.2.81        tcp spt:3306 
dpt:3307 to:192.168.2.81

when i run
iptables -L -n -t nat

but can not connect to the mysql server by specifying --port 3306.

back to google....maybe i'll even go buy the orielly book.

thanks
jd