I need some help here, im running a netcam server on a windows machine from inside my network, and i would like it to be accessible to the outside world. Im running suse 8.1 pro. My script is very basic and just consists of:

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i et0 -j ACCEPT

i plan to run the netcam server on port 1256. it is working and is accessible from inside my network. I need to know what else i need to add to my firewall script in order to have that port forwarded from the outside world. thnx

Just use:
iptables -A FORWARD -p tcp -i ethX -d your.int.ip.addy --dport 1256 -j ACCEPT

Replace ethX with your external/public device and your.int.ip.addy with the address of your windows box.

You forgot prerouting too lol

iptables -t nat -A PREROUTING -p tcp -i ethX --dport 1256 -j DNAT --to-destination your.int.ip.addy:1256

ive tried all the advice, but its still not working. You can connect from machines on the internal network, but not from the outside world.