You are running a vulnerability scan on a remote network and the traffic Is not making It to the target system. You investigate the connection issue and determine that the traffic is making it to the internal interface of your network firewall, but not making. It to the external Interface or to any systems outside your firewall. What is the most likely problem?
The traffic is reaching the internal interface of your network firewall but not proceeding further to the external interface or any external systems. This indicates that the issue is most likely with the network firewall itself, which is blocking the traffic. If the problem were with a host-based firewall or the ISP, the traffic would have either not made it to the firewall or passed through it without issue. Therefore, the network firewall is the most likely culprit.
"the traffic is making it to the internal interface of your network firewall" That's your clue right there - The correct answer is A, if it's the host firewall, the traffic would not have made it past the host.