Bitbucket and iptables on Oracle 7

[Jon Scotto]

After failing to get our fancy internal loadbalancer to handle this, I got our current bitbucket server running on Oracle 6 to work on port 80 by using iptables. 

iptables -A PREROUTING -t nat -i eth0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 7990

This works beautiful on Oracle 6 but not on 7 (same as Redhat Enterprise 7 or CentOS 7). From what I read, there have been significant changes in iptables since RHEL 6. has anyone gotten this to work on 7?