You work as a Network Administrator for Tech Perfect Inc. You need to configure the company firewall so that only Simple Network Management Protocol (SNMP) and Secure HTTP (HTTPS) traffic is allowed into the intranet of the company. No other traffic should be allowed into the intranet. Which of the following rule sets should you use on your firewall to accomplish the task? (Assume left to right equals top to bottom.)
A. Input chain: allow port 25, allow 443, deny all
B. Output chain: allow port 25, allow 443, deny all
C. Input chain: deny all, allow port 25, allow 443
D. Output chain: allow port 443, allow 25, deny all
Answer:A
You work as a Network Administrator for Tech Perfect Inc. You need to configure the company firewall so that only Simple Network Management Protocol (SNMP) and Secure HTTP (HTTPS) traffic is allowed into the intranet of the company. No other traffic should be allowed into the intranet. Which of the following rule sets should you use on your firewall to accomplish the task? (Assume left to right equals top to bottom.)
A. Input chain: allow port 25, allow 443, deny all B. Output chain: allow port 25, allow 443, deny all C. Input chain: deny all, allow port 25, allow 443 D. Output chain: allow port 443, allow 25, deny all
Explanation: In the given rule set, 'Input chain' defines that the rule is for the incoming traffic, i.e., traffic coming from the intranet to the Internet. Port 25 is being allowed for SNMP traffic and port 443 for the HTTPS traffic. Deny all is being used after allowing port 25 and 443; hence, all the other traffic will be denied.