Unauthorized person on my network

July 8, 2011 at 07:46:02
Specs: Macintosh 10.6.7
how to secure router on my mac - neighbor tapping into my internet service. How do I secure my Linksys router so only my laptop, desktop and iPad can use it? I am not a techie so please explain in lay persons terms. Thanks for any help you can give. I tried going to but got nothing.


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July 8, 2011 at 07:49:57
open command prompt,

type "ipconfig" and hit enter,

you are looking for Default Router IP address,

type the address to your web browser ( please note !! try with HTTP:// and HTTPS:// at the beginning)

you should have a login screen (credentials can be found on the back of your router)

then it's just the matter of finding security settings and setting up a password protection on your WiFi


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July 8, 2011 at 07:51:29
Default Gateway (router)

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July 8, 2011 at 08:13:19

It's nice that you want to help but in this instance, you're not really helping.

The OP is using a Mac. Mac's don't have "command prompt" they have a "terminal" window.

New Mac's have a BSD (that's UNIX) based operating system and as such don't have "ipconfig". They use "ifconfig"


I'm not a Mac guy so don't ask me where to find a "terminal window" but if you know, or can find it on your own, open it and do the following command:


In the output look for the Default Gateway address. That is the one you'll want to enter into your web browser to access your router's management interface.

Once there, you can then secure your wireless network. I'm guessing you didn't use encryption and a passphrase and that's why you have neighbors using your WLAN. Enable WPA encryption and use passphrase (key). Then the next time you connect to your WLAN with a wireless client, you'll need to enter the passphrase. Anybody who doesn't know it, will no longer be able to access your WLAN. Use a complex password for the passphrase.

Also, you can specify which wireless clients are allowed to connect by their MAC address if your WLAN is already secured or whoever's using it figures out your passphrase.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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July 8, 2011 at 12:10:30
Thank you very much for the information. I will try what you suggest. Normally MACs are so user friendly but since this is not a MAC issue but a router its a bit more difficult for me.

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July 9, 2011 at 01:37:22
Nice try Curt, but I'm afraid that you also are giving incorrect information. "ifconfig" will not show the default router on OS X (that would be a function of the "netstat" command).

But forget about command lines, Lyndy. Go into "System Preferences" then click on the "Network" icon in the "Internet & Network" section. If more than one connection is shown in the left-hand column, highlight the one marked with a green blob. The right-hand part of the display will now contain an item "Router". That's the IP address that you need to contact.

From there on, follow instructions given previously to access your router's configuration pages.

At the same time you might want to have a quiet word with your neighbour. Remind him that it is a criminal offence to access a computer network without permission (not sure if that's true in your jurisdiction - it is in the UK - but will he know that?) and that you are prepared to contact the authorities if he persists. Having said that, you still want to secure your wireless network.

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