Hi! Welcome! 
Filtering network content. Did not work 
It does not work either for typing block “Exe”, “Zip”, neither a domain nor a list.
Is that a bugs? Do need any additional configuration?
I honestly just installed NethServer for this easy web content filter configuration. Well, but it does not work
I use version 7.3 and everything runs perfect.
Did you enable it?
ContentFilter_General
Enable filter
Enable expression matching on URL
List of blocked file extension
exe,zip
Unfortunately this does not work.
Everything I included.
I also turned Proxy off and on. Did not help. I restarted Squid. Did not help.
The system is set to “fresh”.
Routing works. Samba works. Only the Web filter does not work. Strange.
Seja this link: Transparent HTTPS proxy
A little late reply. But thank you. It works!