Two of Three Mikrotik router became unreachable after few days

RouterOS General
1

We have Mikrotik router (RB951UI models) on three sites. Only one site is stable and accessable remotly. Other two sites are working but we can’t connect to routers either via winbox or ssh. Ssh was configured on non-standard port on all these three routers. customer computers and wifi from inside network is still working. from outside we monitor these routers via snmp, It is also working.

Question: How to enable ssh again, without reseting router ?
Software ID: U5C4-U7K2 - not ok
Software ID: LHLS-Q68I - ok
Software ID: 8XPL-JAKI - not ok

2

Try using winbox and connect via MAC address (have to be on the same LAN)

I had this issue. Router worked fine but couldn’t connect via Winbox to it’s IP. But connecting via MAC address worked. I never could get Winbox working again over IP. I replaced it, I have not yet done a factory reset to see if it works again.