PTR (reverse DNS) records are edited under Reverse DNS. Changes propagate
through DNS; they are not instant.
The public Looking Glass runs ping, traceroute, and MTR
from LayerOne toward an address you choose. Use it to see the path into the
network, not as a replacement for a ticket about your own server.
Always-on L3/L4 DDoS mitigation is included. It is not a reason to skip a
host firewall — still run one.