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 ‘Fritz!’ Category

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Installing as a LAN -> WiFi bridge: FRITZ!WLAN Repeater 1750E

Posted by jpluimers on 2019/01/21

I have a bunch of [WayBack] FRITZ!WLAN Repeater 1750E | Overview | AVM International devices; this is the quickest way to install them as LAN -> WiFi bridge (connect ethernet to your LAN; use the WiFi as a bridge).

  1. Connect the FRITZ!WLAN to your LAN
  2. Connect the FRITZ!WLAN to power
  3. Connect your laptop to the WiFi SSID FRITZ!WLAN Repeater 1750E with password 00000000 (that eight times a zero)
  4. Set your laptop with a fixed IP address 192.168.178.127 with netmask 255.255.255.0 and gateway 192.168.178.2 for WiFi.
  5. Connect to your FRITZ!WLAN at http://192.168.178.2
  6. Setup your FRITZ!WLAN for the first time (password, country) and have it reboot
  7. Logon to the FRITZ!WLAN
  8. Change the WiFI password and the SSID for 2.4 Ghz and 5.0 Ghz channels (I use a different SSID for both as many Fritz!Box devices have both bad 2.4Ghz performance and a hard time to automatically switch from 2.4Ghz to 5.0Ghz on the same SSID automagically).
  9. Change your laptop to use DHCP on WiFi
  10. Reconnect to the Fritz!Box with the new SSID and password

–jeroen

Posted in Fritz!, Fritz!WLAN, Internet, Power User | Leave a Comment »

Not all Fritz!Box devices can be upgraded to the most recent firmware

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

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Parsing simple html in Python

Posted by jpluimers on 2018/11/29

Was working to get fritzcap to emit a list of interfaces so I could specify which one to capture.

For that I needed to parse the output of http://fritz.box/capture.lua which consists of HTML fragments like below.

What I needed was for each consecutive entries of [WayBack] th and first [WayBack] button tags:

  • content of the th tag
  • content of the value attribute of the button tag having a type="submit" attribute and name=start attribute

So before starting to work on it, I created [WayBack] In order to fix #5, print a list of available interfaces to potentially capture from · Issue #6 · jpluimers/fritzcap

The goal was to get a series of key/value pairs:

4-138 = AP2 (2.4 + 5 GHz, ath1) - Interface 1
4-137 = AP2 (2.4 + 5 GHz, ath1) - Interface 0
4-132 = AP (2.4 GHz, ath0) - Interface 1
4-131 = AP (2.4 GHz, ath0) - Interface 0
4-129 = HW (2.4 GHz, wifi0) - Interface 0
4-128 = WLAN Management Traffic - Interface 0a

So I built a class descending from [WayBack] HTMLParser — Simple HTML and XHTML parser that ships with the [WayBack] Python standard libraries.

If in the future I need more complex HTML parsing, then these links will help me choosing more feature rich parsers:

Back to the HTMLParser descendant in interfaces_dumper.py which can basically be condensed down to the code below.

  • handle_data is called for both start tags and end tags. The th value in data is only present in the start tag (at the time of end tag the data is empty), so you need to keep track of both last_start_tag and last_end_tag.
  • handle_endtag maintains last_end_tag to help handle_data.
  • handle_starttag maintains last_start_tag to help handle_data and also handles the button behaviour.
    • The buttonis only relevant if it has type="submit" and name="start" and a value attribute in that order.
    • Output is in data which is an array of key/value pairs.

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Posted in Development, Fritz!, Fritz!Box, fritzcap, Internet, Power User, Python, Scripting, Software Development | Leave a Comment »

Fritz!Box LUA links on my research list

Posted by jpluimers on 2018/11/27

I’m not sure around which firmware versions Fritz!Box started to implement LUA links, but they are now on my research list.

Below a reference and where I found them.

A few notes first:

  • There are many duplicates, which in due time I need to de-duplicate.
  • The .lua links seem to override the old cgi-bin links (that are partially reverse engineered at [WayBack] Category:Befehle in /usr/www/cgi-bin – Fritz!Box).
  • Usually, .lua links require a SID. In the web-ui, a Fritz!Box very much tries to hide that SID from URLs in the browser address bar (especially for firmware versions 06.50 and up) so the easiest to get them is this:
    1. Login to your Fritz!Box
    2. Manually copy any of the URLs in the left side
    3. Take the SID from there.
  • More recent firmware versions hide the .lua links too, but you can see them when monitoring your network traffic in the developer mode of your web browser

Logging in programmatically needs a challenge response mechanism. It used to be at http://www.avm.de/de/Extern/Technical_Note_Session_ID.pdf but now has moved to [Archive.is] https://avm.de/fileadmin/user_upload/Global/Service/Schnittstellen/AVM_Technical_Note_-_Session_ID.pdf

Here is the list:

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Posted in Development, Fritz!, Fritz!Box, Hardware Development, Hardware Interfacing, Internet, Power User | Leave a Comment »

FRITZ!Box call http://fritz.box/cgi-bin/system_status

Posted by jpluimers on 2018/11/22

While researching what the cgi-bin of Fritz!Box devices expose, I found this post on http://fritz.box/cgi-bin/system_status:

[WayBack] FRITZ!Box „Service Code“ auslesen und dekodieren – Antary

FRITZ!Box Fon WLAN 7390–B–041711–000121–533176–734744–147902–840604–28179–avm

  • FRITZ!Box Modell (Name)
  • Annex
  • Gesamtlaufzeit der Box (Stunden, Tage, Monate, Jahre)
  • Neustarts
  • Hash
  • Status
  • Firmwareversion
  • Sub-Version
  • Branding

The site has the entries colour coded, but WordPress doesn’t allow for that.

I found out that on a Fritz!Box 7490 you do not need to logon, but on a Fritz!Box 7360 you have to.

The site has a few other interesting Fritz!Box posts as well:

–jeroen

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