You can specify whether a network interface is trustworthy or untrustworthy. When you specify an interface as untrusted (untrustworthy), any packets received on the interface are likely to be dropped. For example, if you run a ping command on an untrusted interface, the interface drops any ICMP response packet received.
I have read this in my course material and a few other man pages and I am asking myself - what the hell does that mean ?!
Why do I define a interface as trusted or untrusted and what is allowed or disallowed if I choose the one or the other. Something is happening likely sounds for me like a random decision engine is in place by setting up an untrusted interface.
Hopefully someone can explain or point me to a likely network specific information
thanks for the answer - but I need a more specific one
I am actually a network guy - and therefore I would be interested which services and options are available. I mean there has to be a documentation about it - except to say - it trusts or untrusts an interface
So perhaps somebody can point me to a direction (url, document).