Tutorial Share Internet Connection USB Modem with Mikrotik – Several types of new Mikrotik already supports USB port that can be used for various things. USB ports like in PC devices can be used for additional storage media such as USB flash. It can also function as an interface to connect the 3G / EVDO modem. So make Mikrotik devices more flexible in installation, especially in locations that have not reached the internet connection that usually uses wired or wireless.
RouterBoard devices that have USB interface have the characteristics of having a code “U” such as RB411U, RB411UAHR, RB433UAH, RB751U-2HnD, RB751G-2HnD, RB750UP and so on. (Note: For RB411UAHR required USB power injector to turn on a USB device).
In this article will be given step by step tutorial to use USB port function for modem, the picture of network condition, this tutorial uses Indoor RB751U-2HnD RouterBoard device and sierra 3G 881U modem, where the topology as shown in the picture below:
Here are some steps we must do in the configuration: IP Address
The first step we add in our router is the IP Address in the interface that we will use for the local network.
Wireless Access Point
next is to enable wlan1 interface as the access point for the distribution of wireless connection to the local network.
For DNS settings we have to enable the parameter “allow remote request” so that our client can request DNS to our router.
If the IP, interface (ethernet and wireless) and DNS are configured, we attach our 3G modem to the USB port on the router. The thing we need to check again is the menu “/ system USB resource”.
For devices that have been supported Mikrotik, usually will appear a new USB device automatically. Mikrotik will also create a new interface “ppp-out1”.
PPP-Out Internet Dial
To enter the Username, Password and APN from our provider, we input on the ppp-out1 interface that was created by Mikrotik.
The final step, we must add srcnat masquerade to interface ppp-out1 so that client can access to the internet.
Note: Make sure that the modem you are using is already compatible with Mikrotik OS.
The full list of Modems that are already recognized by OS Mikrotik are:
Okay, for you who want to try sharing internet connection from USB modem directly through Mikrotik can try this tutorial. But the condition you must have its RouterBoard yes: D. Okay good luck tutorial Mikrotik Networking this 🙂