بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه أجمعين
بالنسبه الى ازاى firewall يقدر يشتغل layer 3
لان من انواع firewall حاجه اسمها
Packet-Filtering Router
A packet-filtering router applies a set of rules to each incoming and outgoing IP packet and then forwards or discards the packet. The router is typically configured to filter packets going in both directions (from and to the internal network). Filtering rules are based on information contained in a network packet:
Source IP address
Destination IP address
Interface
IP protocol field
for more look to ch 20 in
Cryptography and Network Security Principles and Practices, Fourth Edition By William Stallings
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