Archive for the ‘Hardware’ Category
Posted by jpluimers on 2019/01/17
Cool stuff if you want to make your own WOL devices out of spare parts.
From old to new:
They can be woken up by anything sending magic WOL packets, including Raspberry Pi (which cannot be woken up by them, though you could use a Whack-on-LAN for that).
Basically the Raspberry Pi cannot be woken up with WOL because of a few reasons:
- The ethernet chip is connected over USB so it cannot pass the WOL result further on.
- If it could, there still is no BIOS to process the WOL result.
- When it is halted but has power, the CPU isn’t active. The GPU is, but cannot process the WOL.
It can be a WOL server though: [WayBack] Raspberry Pi As Wake on LAN Server: 5 Steps (with Pictures)
–jeroen
Posted in Development, Ethernet, Hardware Development, Network-and-equipment, Power User, Raspberry Pi, Wake-on-LAN (WoL) | Leave a Comment »
Posted by jpluimers on 2019/01/16
With the advent of WebSockets, it looks like TCP tunnels over HTTP/HTTPS are gaining more ground and I need to put some research time in them.
Some old to new links:
CONNECT requests are not supported by many HTTP proxies, especially in larger organisations, so chisel and crowbar have a much bigger chance there.
And of course there is SoftEtherVPN/SoftEtherVPN: A Free Cross-platform Multi-protocol VPN Software. * For support, troubleshooting and feature requests we have http://www.vpnusers.com/. For critical vulnerability please email us. (mail address is on the header.).
However, that is a VPN solution which is much broader than just a single TCP tunnel. You can so similar things with OpenVPN, but over HTTP/HTTPS, also requires CONNECT:
SoftEtherVPN seems to be more versatile though. I blogged about that before, but back then didn’t have needs for it yet. VPN over HTTPS: Ultimate Powerful VPN Connectivity – SoftEther VPN Project.
–jeroen
via: [WayBack] VPN through only http – Server Fault answer by [WayBack] neutrinus
Posted in Communications Development, Development, HTTP, https, Internet protocol suite, Network-and-equipment, OpenVPN, Power User, TCP, VPN, WebSockets, Windows-Http-Proxy | Leave a Comment »
Posted by jpluimers on 2019/01/14
The TCP BBR congestion control algorithm was introduced in September 2016 and became available in Linux kernel 4.9 in July 2017 after being in the news for a good 5 months (see links below). It strives for better bandwidth use and lowering latency on big data pipes.
This post is a reminder myself to see how widespread that is on recent distributions for both end-user and server systems.
Via:
–jeroen
Posted in Network-and-equipment, Power User | Leave a Comment »
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 »
Posted by jpluimers on 2018/12/17
Experience from a friend:
The cause is that the Samsung only does 60Hz on DisplayPort because they do not support HDMI 2.0.
–jeroen
Posted in 4K Monitor, Displays, Hardware, Power User | Leave a Comment »
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 »
Posted by jpluimers on 2018/12/10
A few things that failed/worked:
I still need to look at the Multivalent.jar when I have a system with Java again, as it is mentioned in [WayBack] pdf generation – Is there a tool to analyze a PDF in terms of fonts, objects, fields and their respective size (kb)? – Stack Overflow
References:
–jeroen
Posted in Adobe, Adobe Acrobat, Fujitsu ScanSnap, Hardware, ix100, ix500, Power User, Scanners | Leave a Comment »
Posted by jpluimers on 2018/12/03
This will come in useful one day:
Notes for monitoring at [WayBack] Multi-WAN – PFSenseDocs: Gateway Groups
- monitoring packet loss on ADSL is cumbersome depending on the ADSL distance
- member down is the easiest to monitor, but on fiber can fail to detect packet loss (the connection seems online, but in fact doesn’t provide traffic)
–jeroen
Posted in Internet, pfSense, Power User, routers | Leave a Comment »
Posted by jpluimers on 2018/11/30
I forgot to document this earlier.
Many Fritz!Box devices cannot be upgraded to recent firmwares. The behaviour differs on hardware revisions of the same model. I’ve seen it happen on Fritz!Box 7360 devices, but others are could be affected too.
You can get the firmware revision using the trick here: FRITZ!Box call http://fritz.box/cgi-bin/system_status.
If your hardware revision is affected, do not expose it to the outside world.
You could still turn it into a local switch though: [WayBack] Convert FRITZ!Box 7360 to Managed Switch (or even Access Point) having it’s own IP address: Setting up the FRITZ!Box as an IP client.
I did this before even discovering about the hardware revision limits as I wanted to keep the full phone history when migrating from ADSL to fiber (which came with a brand new Fritz!Box 7490) and could use the extra LAN ports.
Fritz!Box 7360 hardware revision v1: limited to firmware 06.3x
Read the rest of this entry »
Posted in Fritz!, Fritz!Box, Internet, Power User | Leave a Comment »
The Wiert Corner - irregular stream of stuff 