You have a sophisticated network - four network cards attached to one server(!) - but no clear idea what you are doing, or at least not communicated that here. You need to draw a network diagram and attach in your next post.
Here some random comments. But I don't think they will solve your problem:
> host name is currently showing "localhost.localdomain"
Of no use. It simply means the server can reach itself, which is always the case (in Unix). Except that it gives a bad feeling that you have installed the Debian with a GUI, which is a bad idea for a server.
> The Ip address is http://172.17.14.12/moodle
The IP address is 172.17.14.12, which is private. Good.
> And global IP is http://www.fiveto16.edu/moodle
This is not an IP address, rather a full URL belonging to the domain fiveto16.edu. Is this yet another example? Can't see it in the https://en.wikipedia.org/wiki/Domain_Name_System. If it is the one you want, you need to go to a https://en.wikipedia.org/wiki/Domain_Name_System#Domain_name_registration. If it is just an example, use example.com which is invented exactly for this purpuse; to use as an example.
> We have 4 eth0, eth1, eth2, eth3 card
See the beginning.
> Can this url help to sort this issue
No, unless you run your own DNS server, which is unlikely.
Installing and upgrading help
Reg local and Global IP
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.