On linux ports below 1024 can be opened only by root, so the port 80 is restricted by default
# iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
On linux ports below 1024 can be opened only by root, so the port 80 is restricted by default
# iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080