Debugging NAT rules on the Cisco Firepower Threat Defense 188.8.131.52 is difficult. Debugging has to be done carefully. Things to look for: Relevant Links: Network Address Translation (NAT) for Firepower Threat Defense Configure and Verify NAT on FTD Video:
The network is slow is a common refrain from customer. Its important to be able to test network speed from one endpoint to another. It is good to be able to determine a benchmark speed within your network. MobaXterm can help do that.