admin:network:cable [~wiki]

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====== Cable network ======
It's [[:guide:internet|Internet]] over DOCSIS (TV cable).

===== Modems =====
There are several [[:hardware:modems|modems]] you can use for DOCSIS, some of them mentioned here.

  * Technicolor TC4400 – DOCSIS 3.1

==== Puma bug ====
The Intel Puma 5/6/7 chipsets are vulnerable to the so-called "Puma bug". Do not buy these.

=== Further information: ===

  * [[http://www.badmodems.com/|Badmodems.com]]
  * [[https://approvedmodemlist.com/intel-puma-6-modem-list-chipset-defects/|Intel Puma 6 Modem List Chipset Defects]]
  * [[https://www.theregister.com/2017/08/09/intel_puma_modem_woes/|Intel Pumageddon: Broadband chip bug haunts Chipzilla's past, present and future]] (The Register, 2017)

==== Cable Haunt ====
The [[https://cablehaunt.com/|cable haunt vulnerability]] ([[https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19494|CVE-2019-19494]] is an exploit where an attacker sends malicious packets to your modem which can change settings.

=== Further information: ===

  * [[https://homenetworkguy.com/how-to/protect-against-cable-haunt-vulnerability-using-opnsense/|Mitigate the vulnerability with OPNsense]] (Homenetworkguy, 2/2020)
  * [[https://www.computerbase.de/2020-01/cable-haunt-sicherheitsluecke/|Cable Haunt: Schwachstelle macht Millionen Router angreifbar 🇩🇪]] (Computerbase, 2020)

=== Mitigation ===

  * **Technicolor TC4400:** Block ''192.168.100.1:8080/tcp'' from LAN. You may want to put the TC4400 in its own VLAN.

===== further information =====

==== Deutsch ====
  * [[https://geizhals.de/?cat=wlanroutmod&xf=4024_Kabel-TV|Geizhals – Kabel-Router mit WLAN]]
  * Elektronik-Kompendium:
    * [[https://www.elektronik-kompendium.de/sites/kom/1510061.htm|Kabelnetz-Architektur]]
    * [[https://www.elektronik-kompendium.de/sites/kom/1510071.htm|Internet-Zugang über Kabelanschluss]]
    * [[https://www.elektronik-kompendium.de/sites/kom/0310051.htm|Kabelmodemtechnik]]