How to use your Mac as a wireless router with a LAN connection

The WiFi is the only way that mobile devices can connect to a high-speed Internet. If you only have a LAN connection (the cable I mean) there is a way to use your Mac as a wireless router without the need of a physical one. The only thing you will need are a Mac (really?!), a LAN port and a LAN connection. I sad LAN port because computers like the MacBook Air don’t have it and these require a separate adapter. So let’s start:

First of all, you have to go into System Preferences and choose Sharing under the “Internet and Wireless” section. You will see something like this:

The option you will need is the Internet sharing one. Right now you will not be able to activate it. You will need to select the port from where to share the Internet connection, in my case, is the USB Ethernet, because the MacBook Air doesn’t have a port built-in. Then right down you will find how you want to share the connection. Select then Wi-Fi, but, even if you can activate it now, there are some more few steps to do in order to make the wireless secure and work in the right way.

Click into Wi-Fi options. From here, you can configure the network as you like.

First of all,you have to select a name for it, the default one is your Mac’s name. Then choose if the network should be protected (WPA2 Personal) or without password and accessible for everyone. Last, but very important thing, is the Channel. These are essential to make the network work properly. In a few words, channels are frequencies where the Mac will transmit data. If these channels are already used by hotspots nearby, you can have a blazing fast internet connection but the Wi-Fi will be tremendously slow. In order to avoid this, you must select a channel which is NOT the same one of another Wi-Fi network or is right before or next to it. All of the channels in fact can be overlaid, except for the 1, 6, 11. My advice is to try these ones before, and see the effect. If you note that the Internet connection from your computer is active, but not getting any data, then change the channel immediately, because you will slow down every Wi-Fi network which uses a Channel like the one you chose.

That’s it! Now you should see on the top bar that the Wi-Fi icon has an arrow indicating that it’s currently sharing your LAN connection using the Wi-Fi hardware.

In Italiano

La rete Wi-Fi è l’unico modo con cui i dispositivi mobili si collegano a Internet, e non avere una connessione Wireless può risultare problematico. Tuttavia esiste un modo con cui condividere la connessione via cavo di un Mac con dispositivi dotati di rete Wi-Fi.

Per attivarla, andate in Preferenze di sistema, e selezionate Condivisione. Andate quindi su “Condivisione Internet” e selezionate la porta da cui condividere la connessione e a quali dispositivi nel nostro caso Wi-Fi. Dunque cliccate su “Opzioni Wi-Fi” e impostate un nome per il network, una password e infine il canale. Il canale è essenziale per il corretto funzionamento della rete. Infatti una scelta errata porterebbe al malfunzionamento del network non solo a voi, ma anche alle reti wireless vicine.

I canali sono essenzialmente delle frequenze in cui vengono trasmessi i dati. Questi possono essere sovrapposti, ad eccezione dell’1, 6 e 11. Se nei paraggi è già presente una router che trasmette sullo stesso canale (o adiacente) che avrete scelto, si creerà un malfunzionamento in entrambi i network. Per esempio se un router è nel campo di azione del Mac e usa come canale 4, non potrete scegliere né il 4, il 3 o il 5, dal momento che si sovrapporrebbero tra di loro perdendo i pacchetti scambiati tra il dispositivo e l’Access Point.

Una volta completato anche questo passaggio, il network inizierà a funzionare condividendo la connessione attraverso l’hardware Wi-Fi.

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One response to “How to use your Mac as a wireless router with a LAN connection”

  1. silverblade01 says :

    Reblogged this on Pursuing Dreams, One Post at a Time and commented:
    Very cool if you ask me. You should read the whole thing mac users.


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