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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘WiFi’ Category

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Strange MAC addresses starting FA:8F:CA without OUI in your network? They are Locally Administered Addresses and likely from Google.

Posted by jpluimers on 2019/01/07

A while ago, I write about Locally Administered Addresses: a few series of MAC addresses you can use on your local network: MAC address ranges safe for testing purposes (Locally Administered Address).

A while ago, I found ones in my network and ones in my WiFi SSID survey starting with FA:8F:CA. They did not show up in the Wireshark · OUI Lookup Tool nor their manufacturer database.

But with bit 7 turned off they start with F8:8F:CA which does show up as “F8:8F:CA Google, Inc.”

They appear to be Google devices, in my case Google ChromeCast ones, though they can also be Google Home ones.

Google does “magic” with networks, just look at a few of the links here:

–jeroen

Posted in Ethernet, Google, Internet, Network-and-equipment, Power User, Ubiquiti, WiFi | Leave a Comment »

No more https://www.whatsapp.com/cidr.txt

Posted by jpluimers on 2018/12/11

Not sure when this happened but the CIDR list is no more [WayBack] https://www.whatsapp.com/cidr.txt:

Dear partners,
Please note that we have migrated the latest IP pools of WhatsApp to Facebook Mobile Partner Portal. Feel free to browse to the Settings page of the portal and download the latest WhatsApp IP pool: https://fb.me/mpp_support 
Further IP pool updates are also done through the portal and are no longer distributed via email or through WhatsApp web site.
If you have not yet registered on the Mobile Partner Portal or have difficulties accessing it - please request access through the following form and we'll be happy to assist: https://fb.me/mpp_access
For any technical requests please contact us through the Support section of the portal: https://fb.me/mpp_support 
WhatsApp team

In the past it was the place to get the CIDR so you could either block or allow WhatsApp traffic: [earlier WayBack]

It is still widely cited as way to regulate WhatsApp traffic, for instance at these places:

Time to find an automated way to get the replacement list. Maybe the below helps (via [WayBack] Block facebook messenger and whatsApp on Dlink router – Super User)

whois -h whois.radb.net '!gAS32934'

–jeroen

Posted in Android Devices, Development, Internet, Network-and-equipment, Power User, Routers, SocialMedia, Software Development, Ubiquiti, WhatsApp, WhatsApp for Android, WiFi | Leave a Comment »

Potential wifi drop problem caused by Google devices – Google Product Forums

Posted by jpluimers on 2018/01/15

Sometimes the same problem here on an Asus RT-N66U: Potential wifi drop problem caused by Google devices – Google Product Forums [Archive.is].

Related:

Via [WayBack] Google Cast-apparaten veroorzaken wifi-drop-outs bij verschillende routers – Computer – Nieuws – Tweakers

–jeroen

 

Posted in Power User, WiFi | Leave a Comment »

Kristian Köhntopp – Google+

Posted by jpluimers on 2017/10/18

[WayBack] Kristian Köhntopp – Google+:

The S in IoT is for Security, and the U is for Update Policy.
 –jeroen

 

Posted in Development, Fun, Power User, Quotes, Software Development, WiFi | Leave a Comment »

RSA keys by Infineon chips or libraries can be cracked fast; Severe flaw in WPA2 protocol leaves Wi-Fi traffic open to eavesdropping…

Posted by jpluimers on 2017/10/16

All of our house is wired by ethernet for a reason…

WPA2 Flawed. Once again, it turns out that designing something properly secure is really, really, REALLY hard.

[WayBack] Severe flaw in WPA2 protocol leaves Wi-Fi traffic open to eavesdropping https://arstechnica.com/… – Lars Fosdal – Google+

[Archive.is] If fixes exist, third party firmware will have it in days. Most OEMs, never. I do worry a lot about unfixable flaws in the wifi standards… – Kristian Köhntopp – Google+:

Dave reminds us that there is a reason why people mod the firmware of their Wifi routers, and that reason is actually now more critical than ever.

Via [WayBack] https://www.krackattacks.com/ has a FAQ. Some interesting questions from there:… – Kristian Köhntopp – Google+:

[WayBack] KRACK Attacks: Breaking WPA2 : This website presents the Key Reinstallation Attack (KRACK). It breaks the WPA2 protocol by forcing nonce reuse in encryption algorithms used by Wi-Fi.

 

Since we’re talking security, watch your RSA as it is way worse than the WPA2 one: [Archive.is]

We heard you liked the 10 WPA2 CVE’s, so »A 2nd major crypto vulnerability being disclosed… – Kristian Köhntopp – Google+ quoting

[WayBack] Dan Goodin‏ @dangoodin001: 2nd major crypto vulnerability being disclosed Monday involves millions of 1024- and 2048-bit RSA keys that are practically factorizable.

[WayBack] ROCA: Vulnerable RSA generation (CVE-2017-15361) [CRoCS wiki]

The time complexity and cost for the selected key lengths (Intel E5-2650 v3@3GHz Q2/2014):

  • 512 bit RSA keys – 2 CPU hours (the cost of $0.06);
  • 1024 bit RSA keys – 97 CPU days (the cost of $40-$80);
  • 2048 bit RSA keys – 140.8 CPU years, (the cost of $20,000 – $40,000).

[WayBack] New vulnerabilities found in RSA 1024 and 2048 bit keys. Estimated cost of cracking based on access to the Public key only: 1024 bit: $40 2048 bit: $20k… – Lars Fosdal – Google+

Jan Wildeboer did a nice explanation in laymen terms of both security issues published today:

 

–jeroen

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Posted in LifeHacker, Power User, Security, WiFi | Leave a Comment »

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