Perfect Server 16.4 apache etc Been running perfect server setups for years now with minor problems which are usually fixed by help from these forums. However a few days ago I started to get huge amounts of upload traffic ( 672 GB in 8 days ) and that certainly isn't the norm for this server. I have gone through and changed every password I can think of, found that a NAS had opened itself to the world so shut that down, won't know until I watch the figures today to know if I have stemmed the flow or not Are there any other security packages that you can recommend that will harden the system a bit more against intrusion? I did notice Tripwire and wondered if anyone had any experience with it? Also I have been running the server successfully on a DMZ but it may be time to lock that down a bit more more, so can someone give me a list of the essential ports that should be open on my router for a Perfect Server Ubuntu 16.04 to function smoothly? I know the basic ones but want to make sure I don't miss any. Also just noticed that in ISPC Monit and Munin are showing And I'd like to add a big thanks to these forums for all the help they have given me over the years.