How to configure NAT(Network Address Translation) in Mikrotik ??

NAT is a protocol which allows us to share internet from one or more than  one IPS to share internet to internal IPs.

In Mikrotik We configure NAT  as follows :-

Suppose we have 192.168.0.1/24 (Internal Private Network) .

Your RouterBoard's Ethernet interface is 192.168.1.1/24 (fixed Private Network IP  i.e gateway for internal network ) .

Your RouterBoard's Wireless card is 192.168.138.131/24 (Public Network provide by provider ) .

The Access Point you connect to is 192.168.138.2/24 (Public Network gateway of  our internet ) .

 

Then we have to configure :

1)      Click on Ip >  firewall > NAT

2)      Click on + to add new rule :

a)      Source NAT :

Ø  For Source NAT click on general >chain>choose srcnat>source address(192.168.0.0/24).

Ø  Click on action tab on action select src-nat.

Ø  On to address give public network ip (i.e 192.168.138.131).

Ø  On to ports give 0-65535 (i.e all ports )

b)      Destination NAT :-

Ø  For Destination Nat click on general >chain>choose dstnat>destination address (i.e 192.168.138.2 (i.e public address)

Ø  Click on action tab on action select dst-nat.

Ø  To address give address of local Network .(i.e 192.168.0.0/24)

Ø  On to ports give 0-65535 (i.e all ports )

Now Nat is configure .

Thanks .