Hello.

I have RB1000 with v4.17 and everything worked fine till last night. Something happened (there's nothing in logs) and some interfaces (pptp client and pppoe client) disappeared and some features didn't work properly. I've restored configuration from backup and everything seems to be fine except one thing. I can't reenable ssh service. When I try I get message "Couldn't change IP Service <SSH> - feature is not implemented (2)". Any idea?

try to reinstall the router using netinstall tool. it seems that restoring backup somehow have destroyed your keys.

Thanks for answer. No other option to recreate keys without reinstalling system? And one more question - if I upgrade to 5.x will ssh keys be created?

Answering my own question.. maybe it will be useful for somebody. After normal (not using netinstall) upgrade to from 4.17 to 5.14 ssh works again.