Securing Mikrotik

Dear Members,

Recently one of our friend uses the dude and able to list out all our Mikrotik devices even though he does not know our SNMP community string.

I am wondering if anyone has seen something similar before?

May I know what is your approach so that all Mikrotik Services are out of bound for unauthorized users? Setup input firewall rules?

Thanks much!

Have a look at which interfaces are active in /IP Neighbors - and yes you should check your input filters too.