mikrotik 750 limit access to certain IP range

RouterOS Beginner Basics
1

hi. i am looking for a way to secure my PBX which is in a switch behind mikrotik 750.
i need the pbx to be able to access only a particular range of IPs (voip provider). is there a way to have an access list of some kind?
my setup is:
-mikrotik 192.168.0.1
-PBX 192.168.0.2
the pbx is in an unmanaged switch.
the range of my voip provider that i would like to give access is: 62.38.0.100/24

i am using mainly webfig and winbox

2

Use the firewall. Create an accept rule in the forward chain that has the dst-address of your voip provider. Then create a rule after that that drops everything else.