@Hank21 Could you please upgrade the MongoDB dependency to at least 6.0? This is because it is not possible to install MongoDB 3.0 ... 4.5 to Ubuntu 22.04 or later. MongoDB's current stable version...

@d0ugmac1 Which SNMP objects you are monitoring to get memory status? The default TP-link Zabbix SNMP object set monitors only network related aspects. If possible, could you please list all SNMP...

@d0ugmac1 Thanks for verification of my suspicions. I also activated scheduled reboot for the router and since that, there hasn't been any freeze-ups. How are you monitoring the router memory status?...

@Clive_A Thank you for thorough response. ER605's SW version has not been updated since the initial installing. DHCP server was down, that was checked by plugging a "new" computer directly to ER605's...

ER605 is on small office having about 20 devices on the network. After it was installed on mid-March 2023, to switch cabinet, it worked flawlessly for 4 months. Since mid-July, it has been freezing...

After experimenting more, I noticed, that when WAN is set to "passthrough", then LAN can also be set to passthrough and LAN clients get IPv6 addresses. This is good, but not complete: now the ER605...