IN and OUT interface

RouterOS General
1

my dear colleagues,
when u look at some configurations u see that the in-interface is internal(local) and the out-interface is public. But some times the proffesional who is offering his configuration sample he uses !internal for in-interface instead of using in-interface public.The same goes for out-interface.Is there any difference between the two examples or they are the same?.
thanks

2

It’s logic…

in-interface = Ether1

Matches packets who enters through Ether1

in-interface != Ether1

Matches packets who enters through any interface EXCEPT Ether1

3

thanks