Hi,

* My client has an internet cafe with 25 computers.
* He does not want to change his system of IP (Range of IPs)

I give to him one ip like this (for the Mikrotik Router):
192.168.60.1 IP Address
255.255.255.0 SM
192.168.60.100 GW

100.0.0.1 DNS pri
100.0.0.1 DNS sec

How to adapt Mikrotik to give these computers intenret with this Range of IPs?
192.168.1.X IP Address
255.255.255.0 SM
192.168.1.250 GW

10.20.30.40 DNS pri
10.20.30.40 DNS sec

HI,
you can use one of the IP address from the IP Range and assign it to Mikrotik Router, LAN Interface.

Use the src-nat.