Everyone has a home router, whether they know it or not.
For most of us, our router is the DSL / Cable / Fiber “box” given to us by our ISP.
You can, of course, add your own home router in between your home network and your ISP’s box. This provides an extra level of safety – among other things.
Those of us who are a bit more techie (and crazy) like to roll our own router. There are many reasons for this, not the least of which is security.
Unfortunately, not all routers are created equal, even when they’re “created” by you!
Your average home WiFi router or access point often has a setting so that you can reduce its transmit power level.
This is pretty handy to know given what I talked about in my earlier video, Are WiFi, Bluetooth, 4G, and 5G bad for you?
The typical range for 2.4GHz WiFi is 150ft (46m) indoors, and 300ft (92m) outdoors. For 5GHz Wifi, it’s more like 50ft (15m) and 100ft (30m). The lower you set the power, the shorter the range – but the less you are blasted by the WiFi signal!
There’s no reason to leave the transmit power at maximum if you don’t need the range… As an added bonus, lower range means increased security since it’s less likely someone else will “see” your WiFi network.
I’m not a big fan of WiFi, but I do use it from time to time.
It’s just convenient to use for some gizmos where an ethernet dongle is not supported.
Trouble is, I kept forgetting to turn off my WiFi router when I was done.
And then – two days later – I would discover I was still bombarding myself with magic 5 GHz death rays.
Not any more!!
Bonjour is Apple’s way of doing zero-configuration networking. It’s a bit of software that does three things:
- Service discovery on the local network (LAN)
- IP address assignment/sharing
- Hostname resolution
Normally, things like IP address assignment are handled by DHCP. With Bonjour, the idea is that all you have to do is plug your gizmos in, and turn them on. Bonjour will then “scan” the network, and all devices and services on the LAN will be automagically configured for you. Each gizmo will have an automatically configured IP and hostname, and you’re done.
This is great, except when you don’t want Bonjour to do its thing. Perhaps you have a mostly Windows/Linux LAN, or you want to restrict access to a certain group of computers on your LAN that are separated from the rest by a physical home router/firewall. Bonjour makes this rather difficult, since it sneaks by basic IP/MAC filtering you might set in your router.
So, how do you block Bonjour?