Simulation
Configure the firewall (fill out the table) to allow these four rules:

Answer: See the explanation

Explanation:
Use the following answer for this simulation task.
Source IP Destination IP Port number TCP/UDP Allow/Deny
10.4.255.10/24 10.4.255.101 443 TCP Allow
10.4.255.10/23 10.4.255.2 22 TCP Allow
10.4.255.10/25 10.4.255.101 Any Any Allow
10.4.255.10/25 10.4.255.102 Any Any Allow

Firewall rules act like ACLs, and they are used to dictate what traffic can pass between the firewall and
the internal network. Three possible actions can be taken based on the rule’s criteria:
Block the connection
Allow the connection
Allow the connection only if it is secured
TCP is responsible for providing a reliable, one-to-one, connection-oriented session. TCP establishes a
connection and ensures that the other end receives any packets sent. Two hosts communicate packet
results with each other. TCP also ensures that packets are decoded and sequenced properly. This
connection is persistent during the session. When the session ends, the connection is torn down.
UDP provides an unreliable connectionless communication method between hosts. UDP is considered a
best-effort protocol, but it’s considerably faster than TCP. The sessions don’t establish a synchronized
session like the kind used in TCP, and UDP doesn’t guarantee error-free communications. The primary
purpose of UDP is to send small packets of information. The application is responsible for acknowledging
the correct reception of the data.
Port 22 is used by both SSH and SCP with UDP.
Port 443 is used for secure web connections – HTTPS and is a TCP port.
Thus to make sure only the Accounting computer has HTTPS access to the Administrative server you
should use TCP port 443 and set the rule to allow communication between 10.4.255.10/24 (Accounting)
and 10.4.255.101 (Administrative server1)
Thus to make sure that only the HR computer has access to Server2 over SCP you need use of TCP port 22
and set the rule to allow communication between 10.4.255.10/23 (HR) and 10.4.255.2 (server2)Thus to make sure that the IT computer can access both the Administrative servers you need to use a
port and accompanying port number and set the rule to allow communication between:
10.4.255.10.25 (IT computer) and 10.4.255.101 (Administrative server1)
10.4.255.10.25 (IT computer) and 10.4.255.102 (Administrative server2)

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 77, 83, 96, 157