You can, but doing so will only prevent the most casual of computer users from "seeing" your network.
That's because there are numerous free utilities on the Internet that will reveal a "closed" or "hidden" network in seconds.
Another possible downside to doing this is that some wireless devices....mobile devices in particular.....can sometimes have difficulty trying to connect.
There is no harm in "hiding" your network if everything seems to work OK. And, it will keep a few honest neighbors from seeing the name of your network.
Unfortunately, they are probably not the guys that you need to worry about. That van with the antenna on top....a few houses up the street...been there for a few hours.....you may need to worrry about
When they notice that you have attempted to hide your network, they will go after your network first.....reasoning that you likely have more to hide.
- Open Macintosh HD > Applications > Utiliites > AirPort Utility
- Click on the AirPort Extreme icon and then click Edit
- Click the Wireless tab at the top of the window
- Click Wireless Options at the bottom of the window
- Enter a check mark next to Creat Hidden Network
- Click Save
- Click Update to store your new settings