how to block outgoing hacking scans?

[lope <lopeonline () gmail com>]

Hi,

I want to provide a BASIC free wifi service.

I want to block illegal/unwanted outgoing traffic.

My experience
+ Very familiar with IPTABLES and IPSETs
/ A little experience using fail2ban
- Never used snort

To make things easier I'll block all outgoing ports except 53, 80 443
I may potentially also allow email ports: 995 993 587 465
I don't care about people not being able to do some legitemate stuff 
that uses other ports, this will just be a BASIC service, with the 
emphasis on making it easy for me to prevent/reduce abuse.

*Can you please suggest what software to use for the following?*
Any other information you can provide will be much appreciated.
Are there any specific steps or relevant settings that need to be set to 
achieve these things?

I'm looking for a quick way to get started, because I've got no clue 
where to start to achieve the following:

Block 1: Illegal traffic I'd like to block
* Hacking/Scans (like searching for website vulnerabilities), hammering 
wordpress login pages etc.

Block 2: Unwanted traffic I'd like to block
* avi,mp4,mp3,mk4,zip,exe,rar,7z,.torrent etc
* HTTP/HTTPS connections carrying more than x MB > Temp ban.

Any other stuff you suggest I block?


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