A Network Administrator Is Tasked to Block All Outbound SSH

question 345

Multiple Choice

A network administrator is tasked to block all outbound SSH connections on the default port from a network subnet of 10.152.8.0/21 on a Linux based firewall. Which of the following rule sets would accomplish this task?

• A) iptables -i OUTPUT -d 10.152.8.0/21 -p TCP --dport 22 -j REJECT
• B) iptables -i OUTPUT -d 10.152.8.0/21 -p TCP --dport 23 -j REJECT
• C) iptables -i OUTPUT -d 10.152.8.0/21 -p TCP --dport 22 -j ACCEPT
• D) iptables -i OUTPUT -d 10.152.8.0/21 -p TCP --dport 23 -j ACCEPT