For environments with multiple admins just don't use root - ever if possible.
Use sudo for everything - sudo is extremely configurable and easily logable.
Log any / all logins or su's to root & investigate them as someone is then going around your established rules.
Short answer: you can't. Ports below 1024 can be opened only by root. As per comment - well, you can, using CAP_NET_BIND_SERVICE, but that approach, applied to java bin will make any java program to be run with this setting, which is undesirable, if not a security risk.
The long answer: you can redirect connections on port 80 to some other port you can open as normal user.
Run as root:
# iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
As loopback devices (like localhost) do not use the prerouting rules, if you need to use localhost, etc., add this rule as well (thanks @Francesco):
# iptables -t nat -I OUTPUT -p tcp -d 127.0.0.1 --dport 80 -j REDIRECT --to-ports 8080
NOTE: The above solution is not well suited for multi-user systems, as any user can open port 8080 (or any other high port you decide to use), thus intercepting the traffic. (Credits to CesarB).
EDIT: as per comment question - to delete the above rule:
# iptables -t nat --line-numbers -n -L
This will output something like:
Chain PREROUTING (policy ACCEPT)
num target prot opt source destination
1 REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080 redir ports 8088
2 REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 8080
The rule you are interested in is nr. 2, so to delete it:
# iptables -t nat -D PREROUTING 2
Best Answer
My friend, I think that you are thinking iLO does something other than what it does.
iLO is an interface to a virtual display. Other than a rough VNC session to the video I/O stream (not even X:0; more like the display adapter itself) and Keyboard & Mouse inpute, you can't interact with the system. iLO is for out-of-band management. It's better than hooking up a crash cart (especially if your server is in another country, state, datacenter, room, or laziness range), but the interaction could be said to be screen-based.
What you see is what you get.
This makes it extremely useful and resilient. This is what allows you to see the machine from power-application (before power is on!) to watch and interact with the BIOS, RAID, and netboot, or select booting to other media.