The Company ABC has hired you to improve security of its corporate network using the packet

filtering firewall they have just purchased. Your job is to configure a static rule set that reflects

ABC$$s business needs using the table given below. Use best practices to lockdown firewall

security as much as possible without blocking legitimate traffic. In developing a static rule set,

you are required to develop both outbound $($egress$)$ and inbound $($ingress$)$ screening rules.

ABC$$s business requirements are translated into the following rules. $(15$ Marks$)$

i$.$ The ABC company has several remote offices that access the web server placed in

the corporate network. Remote office $1$ accesses the ABC$$s web server $(192\mathrm{.}16\mathrm{.}23\mathrm{.}34)$

on port $80,$ from the source port of $8724.$ Remote office $2$ accesses the ABC$$ web

server on port $80,$ from the source port of $7323.$ Remote offices use a typical ADSL

connection to connect to the internet.

ii$.$ The company wants to restrict its employees$$ ability to send ICMP messages to the

Internet.

iii. ABC allows its employees to remotely check their emails on port $110.$ The company$$s

email server $(192\mathrm{.}16\mathrm{.}23\mathrm{.}35)$ uses POP$3$ and is located on its corporate network.

iv$.$ ABC has an SMTP email server $(192\mathrm{.}16\mathrm{.}23\mathrm{.}35)$ operating on its corporate network.

The mail server exchanges emails with other email servers using the SMTP$$s default

port.

v$.$ ABC wants to deny all other traffic coming into its corporate network.