In the new firmware Firmware v5.37.zip you can define up to 10 pcs. DNS hostnames, which you can then select instead of IP addresses in the TFTP, SNTP, MQTT, SNMP, and PingMonitor services. For this purpose we have added a DNS client to the firmware and in the "IP Settings" menu you need to set up a primary and secondary DNS server.
This update includes many other improvements and bugfixes (more information is in the archive).
IMPORTANT !!! Even if you do not use these names, the configuration of the addresses of the DNS servers must be done if you use the "SmartSpace" cloud!