This question is about firewalls and firewall rules.

a) Explain the difference between a packet filtering firewall and bastion host and how the two can be used in combination. (6 marks)

b) Explain TWO issues with the firewall configuration shown below. (4 marks)

c) Explain how to fix both issues. You must provide both, the fixed ruleset (no html table required, text is sufficient) and a rationale for the fixes