question about how does non-statful firewall receiving incomming communications
Posted on 2011-09-02
i know that in statful firewall the comunication that initiated from inside are letting packet comming back from outside and allowing the packet to enter in HIGH port because is keep a state table of correct session.
my question is, how things work in non- statfull firewalls regarding incomming commiucation than trying to enter my network as RESPONSE to my requesion (meanning the same situation as i discribe in statful firewall, lets say i going to a web page and requeting data from the web server and the communication comming back to my router)
in statfull firewall i know that i dont need to open the hight port manually , however the destination port is in high port number, and the firewall let the packet to pass since he has a record that i started the connection.
but how things are working in non statfull firewall.
does the packet that comes as a reply to my requestion also have high port number in the destination? do i need to open the high port manually?
another question is, does most of the router / firewall today are statfull firewalls?