Any idea how to crate rule for block all outgoing traffic on a server except for auto updates and apt repositories as well as established connections from the outside and internal network traffic (such as ossec server/agent) and block all inbound traffic except for the ports really necessary for your setup (ssh)
Hari's Technical Space 
Any idea how to crate rule for block all outgoing traffic on a server except for auto updates and apt repositories as well as established connections from the outside and internal network traffic (such as ossec server/agent) and block all inbound traffic except for the ports really necessary for your setup (ssh)
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Yes You can write rules in iptables or firewalld . you can write either host based rules or port based .
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