Firewall Fundamentals

Prompts and answers

• Which security solution inspects the incoming and outgoing traffic of a device or a network?
  Firewall
• Which type of firewall maintains the state of connections?
  stateful firewall
• Which type of firewall offers heuristic analysis for the traffic?
  next-generation firewall
• Which type of firewall inspects the traffic coming to an application?
  proxy firewall
• Which type of action should be defined in a rule to permit any traffic?
  allow
• What is the direction of the rule that is created for the traffic leaving our network?
  outbound
• What is the name of the rule that was created to block all incoming traffic on the SSH port?
  Core Op
• A rule was created to allow SSH from one single IP address. What is the rule name?
  Infra team
• Which IP address is allowed under this rule?
  192.168.13.7
• Which Linux firewall utility is considered to be the successor of "iptables"?
  nftables
• What rule would you issue with ufw to deny all outgoing traffic from your machine as a default policy? (answer without sudo)
  ufw default deny outgoing