I have not been able to get OSPF /w authentication working between a cisco router & a mikrotik router running v2.9.14.
I am able to get it up when the authentication is set to none but not when the backbone authentication is set to simple or MD5.
The cisco router in question is running 12.2(19), it is running OSPF to two other routers using MD5 auth. but on the interface going to the mikrotik I have turned the authentication to to get ospf to work.

I would prefer to use authentication on the OSPF traffic if possilbe.