Not sure what solution to use

RouterOS Beginner Basics
1

Howdy,

I’ve been asked by the landlord of a multi-tenant building to come up with a way to reconfigure their internet connection.

Right now, they have 6 IP addresses. One is in the 12.118.xx.xx range and the other 5 are 12.97.xx.xx

Everything is currently using the 12.118.xx.xx address as the externally-facing connection.

I would like to use the small Mikrotik 5-port router to add the other addresses for tenants to use as their externally facing addresses.

Would it be possible for me to turn on a VLAN for each of the ports on the Mikrotik, and then just have them route through the 12.118.xx.xx address?

Any suggestions would be appreciated.

2

Difficult to provide more specific instructions due to the scarce information, but:

Assuming there’s one router with one WAN connection which routes 6 public IP addresses, in order to masquerade outgoing Internet connections you only need:

  • Have all the IPs assigned on the router. I assume the 12.118.xx.xx one is the one the ISP hands over for your connection (Static, DHCP or PPPoE?) You can create an empty bridge and assign the 5 12.97.xx.xx IPs on it.

  • Create src-nat rules so that different src-address LAN ranges (guess each building uses its own) are src-nat’ed as an specific 12.97.xx.xx IP as to-addresses for each.