Hello,
I have two IP cameras in my company and I would like to connect the cameras from home but I can't. I applied commands that I listed below. I wonder if tehere is a mistake in the commands.
Have a nice day

iptables -I INPUT -s 80.200.111.40/24 -p tcp --dport 8050 -j ACCEPT
iptables -I INPUT -s 80.200.111.40/24 -p tcp --dport 8051 -j ACCEPT
iptables -A FORWARD -p tcp -d 80.200.111.40 --dport 8050 -j ACCEPT
iptables -A FORWARD -p tcp -d 80.200.111.40 --dport 8051 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp -i eth1 --dport 8051 -j DNAT --to-destination 80.200.111.40:8051
iptables -t nat -A PREROUTING -p tcp -i eth1 --dport 8050 -j DNAT --to-destination 80.200.111.40:8050

Do these cameras have public IPs? If not, then I don't see where you're doing any NAT to forward connections on your public IP to the cameras' private IPs.