I'm using Italian ntp servers that I can ping normally from my computer. But in the logs of the ER605 it shows 2022-10-14 13:04:19 Sntp WARNING Time renew failed, connecting NTP server timeout.

The problem highlighted here https://community.tp-link.com/en/business/forum/topic/520782 is still present. This is a shame.

@GRL In my case it does not matter. You can use the IP, the hostname.... same result

@Fae The ISP has confirmed that IS NOT blocking any port. As a demonstration of it, my Mac Mini inside the network is able to get the NTP answer from the NTP Apple server! So the ER605 sends the...

@Fae It's the same story even with google server.... No response. What I find a little bit strange is the source port from the ER605... Is it normal that it changes like that for the NTP protocol?

@Fae This is my configuration on the router: This is what I see on Wireshark: (source is the IP address of the WAN) The IP of the NTP server is always on the destination but I no see any traffic as a...