I only need ssh and nginx. How to stop/close everything else?

Question

Debian

Debian 8
netstat -ntulp

I only need ssh and nginx. How to stop/close everything else?

Answer 1

If the network service is not needed, then it should not be disabled / blocked, but removed.

Answer 2

Add to the list of iptables rules:
...
:INPUT DROP [0:0]
...
-A INPUT -i ethN -p tcp -m multiport --dports 146,80 -j ACCEPT
...

Answer 3

Your question is very easy to google for "debian 8 stop %name%"
For example, to disable rpc.statd and rpcbind it should be enough to stop/stop the rpcbind service.
Most likely, "systemctl stop rpcbind.service" will work.
But the question arises - why?