Really, I want to disable non-authorization user access to all internet services.
On SME 5.5 this may be done by disabling masq (service masq stop), but on SME 5.6 when i do this i lose connection to server and whole server can not be reached from all clients.
How can I disable masq, but enable local access to squid, smtp, pop3, smb, ssh, http, https???
As i know, i must to do something with /etc/init.d/masq ?
Enabling transparent proxy (thanks to Jon Blakely and Jochen Hoegerl) disable non-authorization access to internet on port 80, but it is not solution to my problem.