Which of the following actions could a new security administrator take to further mitigate this issue?

A new malware spreads over UDP Port 8320 and several network hosts have been infected. A new security administrator has determined a possible cause, and the infected machines have been quarantined.

Which of the following actions could a new security administrator take to further mitigate this issue?
A . Limit source ports on the firewall to specific IP addresses.
B . Add an explicit deny-all and log rule as the final entry of the firewall rulebase.
C . Implement stateful UDP filtering on UDP ports above 1024.
D . Configure the firewall to use IPv6 by default.

View Answer

Answer: B