014.01.58.3. Describe the command used to block communication from a specific IP address (192.168.34.63) to your machine.
This question evaluates the candidate's ability to interpret and apply iptables commands for blocking communication from a specified source IP address.
The -A input parameter appends a rule to the INPUT chain. The -s 192.168.34.63 part specifies the source address in the rule, and -j DROP tells the kernel to discard any packet matching the rule. Therefore, the machine will throw out any packet from 192.168.34.63.
Here, the -A INPUT appends a rule to the INPUT chain. The parameter -s 192.168.34.63 specifies the source address in the rule, and -j DROP instructs the kernel to discard any packet that matches this rule. Consequently, the machine will reject any incoming packet from 192.168.34.63.
