networking

KRACK Wi-Fi Flaw: What You Need to Know

You may have heard about the latest Wi-Fi vulnerability in the news called “KRACK” or “Key Reinstallation Attack.” This is a security flaw in the WPA2 protocol that could allow a third party to intercept network activity between a router and a device. It does this by taking advantage of a problem with the way the client (your mobile device or computer) authenticates with the access point (the router).

Why is my router dropping out?

Episode 1427

Perry from Ocean Beach, CA
ARRIS SURFboard SB6141 DOCSIS 3.0 Cable Modem

Perry has a NetGear C6900 modem/router and it just drops out for several seconds from time to time. Leo says that routers and cable modems do wear out over time, and if he gets a lot of drop outs, it could be time to replace it. But Perry's router is only six months old, so that shouldn't be happening. Leo says he could try updating the firmware. PadreSJ says that the NetGear Combo units start having memory issues that cause server busy errors. Perry should go into his settings to find the logs and see if he is getting errors like that.

Why can't I get WiFi in my apartment?

Episode 1422

David from Burbank,CA
WiFi

David lives in a fifth floor apartment with 100 Mbps WiFi available. He can't get it on his floor, though. What can he do? Leo says that WiFi is generally limited by distance and David is just too far away from the access point. He needs one on his floor. If he can get his own modem, that's what he should do. He could also try getting a group together to get WiFi extenders and put a few on every floor. That would help.

Why won't my Lenovo Yoga connect to WiFi?

Episode 1411

Carrie from Hermosa Beach, CA
Lenovo Yoga 2

Carrie has a Lenovo Yoga 2 convertible and it won't connect to the internet. It's asking for an adapter. Leo says that the Yoga is wireless, so it shouldn't need an adapter. Leo advises going into the Device Manager by pressing Windows Key and typing "device," then pressing Return. This will show her a list of all her hardware. That will show her if there's a problem with the networking device. She can delete it and then restart the machine. Windows will then reinstall the device driver. There's also a WiFi on/off switch.

How can I get details on the signal strength of my wireless network?

Episode 1411

Keith from Phoenix, AZ
WiFi Explorer

Keith wants to know how strong his WiFi network is. Leo recommends WiFi Analyzer. For the Mac, there's WiFi Explorer. It will give him a line graph with signal strength according to channel. It's $20.

He can find other WiFi analyzer apps at netspotapp.com. It may be that all he needs to do is reset his WiFi settings.

How can I improve the WiFi in my house?

Episode 1406

Jose from Burbank, CA
TPLink AC1750 Wi-Fi Range Extender, AV1200 Powerline Edition

Jose has issues with WiFi reaching to the back bedroom in the house. He gets practically no signal at all on his phone back there either. He's told it would be a major issue to move his base station to make it better. What should he do? Leo says that it's a common problem that is largely due to congestion from everyone in the neighborhood. The key is to get an extender. He'll want one that's from the same company. It will cut his bandwidth in half, however, so that's not an ideal solution.

Why do I get less bandwidth in my bedroom?

Episode 1404

Terry from Long Beach, CA
Luma mesh router

Terry got the Luma mesh router and he gets pretty good 100 MB bandwidth everywhere but his master bedroom, which is about a third that. He even bought another module and it didn't help. Leo suspects that instead of a daisy chain extension, it's more like a star pattern, and that could end up with some dead or weak spots.

(Disclaimer: Eero is a sponsor).