Your point about allowing the ICMP protocol to get through made me think about this a bit more. Here's what I think is happening. Since the 'Allow' LAN to IoT ACL Rule is in place, the ping from LAN...

My system is shown here for reference. Also, here's a bulleted list of equipment. I just checked/confirmed that they all have the latest firmware: TP-Link TLR-605 v1.0 (1.2.0) TP-Link OC200 v 1.0...

@Penn50 I saw that warning too, but I've set my OC-200 to keep 30 days of logs and it has no issues with that setting. In fact, I've considered keeping 60 days as it appears that it should be fine...

@JohnyBitz It was not in ver 4.x

@JohnyBitz Look under Settings > Services > DHCP Reservation. with firmware 5.x.xx (I'm using 5.0.30) You can create a DHCP reservation for any LAN you're running.

937516 Fae wrote Dear @lflorack, lflorack wrote Issue #1 My TL-R605 Router/Gateway now randomly goes offline and comes back online approximately 20-30 seconds later. This can be more than once daily...