The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Network-and-equipment’ Category

Using Google/Cloudflare/central DNS can bite you with large downloads

Posted by jpluimers on 2021/10/22

If you think download speeds are slow for large downloads (or multi-media playback is slow or quality is low) on a fast link, then consider your DNS.

Many people report that using one of the centralised DNS services (like Google/Cloudflare/…) causes slowness because they direct CDN lookups to a small pool of servers that get overloaded.

Some links:

Via [WayBack] How to check whether DNS is working through a browser? – Super User

Google DNS also allows for interactive querying, for example [WayBack] Google Public DNS

Read the rest of this entry »

Posted in Cloud, Cloudflare, DNS, Hardware, Infrastructure, Internet, Network-and-equipment, Power User | Leave a Comment »

For WiFi guest networks with a fixed SSID: QR code – Wikipedia

Posted by jpluimers on 2021/10/06

Access Denied

Access Denied

I knew it was possible to generate QR codes to access quest networks (as the QR code has credentials) for WiFi networks having a fixed SSID.

I just never bothered, but did when needed home care with quite a few different people providing the care.

Generating was easier than I anticipated, though I hoped I just could put the parameters in a URL and fire off to get a page including the QR code.

Alas, the pages I found require you to enter the SSID name and key/password phrase.

That’s OK: I have saved the PNG files for our network and my brother’s as images so I can put them on-line, and printed them out so guests can scan and use the network at once.

Here we go:

  • 124 network Access Denied, key 2171TB24
  • 171 network Disconnected, key 1060NP71

Related:

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Posted in Barcode, Development, Fritz!, Fritz!Box, JavaScript/ECMAScript, Network-and-equipment, Power User, QR code, Scripting, Software Development, Web Development, WiFi | Leave a Comment »

UniFi USG link dump

Posted by jpluimers on 2021/10/04

I wanted to setup a UniFi USG (Ubiquiti Unifi Security Gateway) with round robin multi-WAN and incoming port forwarding on both WAN connections.

Quite a few links were the result:

Adoption was another headache. Some links on that too:

If you end up in a cannot adopt state, then a reset is the only practical way to go:

–jeroen

Posted in Network-and-equipment, Power User, Unifi-Ubiquiti, USG Ubiquiti Unifi Security Gateway | Leave a Comment »

UCM6200 series IP PBX for Unified Communications- Grandstream Networks

Posted by jpluimers on 2021/10/04

The UCM6200 IP PBX series allows businesses to unify multiple communication technologies, such as voice, video calling, video conferencing, video surveillance, data tools, mobility options and facility access management onto one common network.

[WayBack] UCM6200 series IP PBX for Unified Communications- Grandstream Networks

–jeroen

Posted in Hardware, Network-and-equipment, Power User, Telephony, VoIP | Leave a Comment »

MikroTik PoE: automatically power cycle and reboot device when it becomes unresponsive.

Posted by jpluimers on 2021/09/24

In the past I had these manual scripts to power-cycle a hung RaaspberryPi device:

/interface ethernet poe set ether5 poe-out=off
/interface ethernet poe set ether5 poe-out=forced-on

or on one line:

/interface ethernet poe set ether5 poe-out=off; /interface ethernet poe set ether5 poe-out=forced-on

I am going to try this script for the port having a Raspberry Pi on it (note: this requires a 48V power brick for the Mikrotik!) on RouterOS version 6.48.3 (stable):

/interface ethernet
set [ find default-name=ether5 ] comment="RaspberryPi" poe-out=\
    forced-on power-cycle-ping-address=192.168.124.38 power-cycle-ping-enabled=\
    yes power-cycle-ping-timeout=2m

The above has not worked for a long time as per [Wayback] No POE Power Cycle @ hEX POE – MikroTik:

But it might be fixed as of [Wayback] RouterOS version v6.47.3[stable] as per [Wayback] MikroTik Routers and Wireless – Software: 6.47.3 (2020-Sep-01 05:24):

*) poe – fixed “power-cycle” functionality on RB960GSP;

Similar issues exist on RB760iGS/Hex S, and there the fix requires new hardware in addition to firmware as per [Wayback] POE OUT issue on ether5 rb760igs (no power) – MikroTik

Note that I did disassemble both of these routers for inspection and there are obvious changes to the hardware to correct the PoE problems – most notably a completely different relay, capacitor and some minor circuit design changes.

If it still fails, I might try

[Wayback] No POE Power Cycle @ hEX POE – MikroTik: workaround script

:local ipPing ("x.x.x.x")
:local pingip
#
# pingip below RUNS and sets the variable
# to number of successful pings ie 3 means 3 of 45 success
# can also use ($pingip > 1) or ($pingip >= 1) both TESTED
# ($pingip >= 1) means if only 1 or 0 pings do the IF, not the ELSE
#
:log info ("ping CHECK script IS RUNNING NOW")
# first delay 90 b4 ping test incase this is running at POWER UP
:delay 90
:set pingip [/ping $ipPing count=45]
:if ($pingip <= 3) do={ :log warning (">95% lost ping LOSS to isp GW IP x.x.x.x via ether5 so DO POE powerCYCLE")
  /interface ethernet poe set ether5 poe-out=off
  :delay 12
  /interface ethernet poe set ether5 poe-out=auto-on
  :delay 10
  :log warning ("ether5 POE HAS BEEN TURNED BACK ON")
  :delay 90
  /system script run emailPOEresult
} else={
  :log warning ("PoeCyclePINGcheck ELSE ran so no ping loss detected by script")
}

Based on:

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Posted in Development, Hardware Development, Internet, MikroTik, Power User, Raspberry Pi, routers | Leave a Comment »

Mikrotik RouterOS “/ip ssh” setting not available from WinBox and defaulting to insecure?

Posted by jpluimers on 2021/09/20

Still need to research this further:

Somewhere around 6.44, when upgrading an existing RouterOS device, this snippet became part of the configuration:

/ip ssh
set allow-none-crypto=yes forwarding-enabled=remote

A few remarks:

  • I could not find anything in WinBox that is equivalent.
  • This sounds very insecure, so I have run this script:
    /ip ssh
    set allow-none-crypto=no forwarding-enabled=no

    which makes the snippet to disappear (because they are default settings according to [WayBack] Manual:IP/SSH – MikroTik Wiki).

    Like usual, the on-line documentation is dense and insufficiently clear, hence my measure.

In the future, I need to decipher these posts (via [WayBack] winbox ssh allow none crypto – Google Search and [WayBack] winbox ssh forwarding enabled remote – Google Search):

–jeroen

Posted in Internet, MikroTik, Power User, routers | Leave a Comment »

vidister – ☎️ FTTH sur Twitter : “Shitty idea of the day: Powering a soldering iron via PoE.… “

Posted by jpluimers on 2021/09/15

[WayBack] vidister – ☎️ FTTH on Twitter : “Shitty idea of the day: Powering a soldering iron via PoE.… “:

Via: [WayBack] Amy Renee on Twitter : “Soldering the packets together to enable jumbo frames. 😂😂😂… “

–jeroen

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Posted in Development, Ethernet, Hardware Development, Network-and-equipment, PoE - Power over Ethernet, Power User, Soldering | Leave a Comment »

Shelly Shop USA

Posted by jpluimers on 2021/09/01

IoT power switching equipment at [WayBack] Shelly Shop Europe:

Via: [WayBack] Tweakers Gift Guide 2019 – Smarthome – Koophulp – Tweakers

–jeroen

Posted in Development, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User | Leave a Comment »

MikroTik RB960PGS hEX PoE powering PoE devices: ensure you get a 48V power supply

Posted by jpluimers on 2021/08/24

By default, the [WayBack] MikroTik RB960PGS hEX PoE comes with a 24V power supply.

Most PoE capable devices cannot be powered by 24V but need 48V. I wrote about this before in the midst of the long post Linus Torvalds – Google+: Working gadgets: Ubiquiti UniFi collection (and a whole bunch of Unifi/Ubiquiti/Ubtn links)

So now I re-mention it in a much smaller post so it easier to find back, and a few links to Power over Ethernet – Wikipedia, where especially these bits are relevant:

  • The PoE Standard implementation for 802.3af (802.3at Type 1) “PoE” requires DC 44.0–57.0 V.
  • Of the PoE Non-standard_implementations, some common Passive specifications include:
    • 24VDC 0.5A 100 Mbit/s or 1 Gbit/s
    • 24VDC 1.0A 100 Mbit/s or 1 Gbit/s
    • 48VDC 1.0A 100 Mbit/s or 1 Gbit/s
    • 56VDC 1.0A and 2.0A 1 Gbit/s (used for 45W+ load point to point microwave and millimeter band radios

The 24V is what MikroTik sticks to with their default power supply.

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Posted in Internet, MikroTik, Network-and-equipment, Power User, routers, Unifi-Ubiquiti | Leave a Comment »

Winbox 3.19 can connect via MAC whereas Winbox 3.17 cannot

Posted by jpluimers on 2021/08/17

Not sure why, but Winbox 3.17 could not connect to out of the box blank MikroTik equipment at all.

Winbox 3.19 complains every now and than, but usually connects fine.

This was while configuring a bunch of [WayBack] MikroTik Routers and Wireless – Products: CRS305-1G-4S+IN.

Read the rest of this entry »

Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »