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Actually, that remote admin protocol ISP used TR-069 is a open protocol that was implemented on many router you can buy on the market. Even without remote contr

Actually, that remote admin protocol ISP used TR-069 is a open protocol that was implemented on many router you can buy on the market. Even without remote control, there is nothing prevent them from just tell you the parameter you need to use(pppoe account or whatever). They can't support it is clearly a lie in most case.

jcrawfordor 6y ago
DOCSIS authentication is based on the HFC-side MAC address of the modem (part of the DOCSIS management protocol) and TR-069 is not required for any basic functionality - it is typically only used to manage functionality that it not common in third-party modems like an integrated WiFi AP. The more complicated matter is that firmware is typically delivered to the modem via the DOCSIS management protocol (lower level than TR-069) and so the ISP must have firmware available for all supported modems. This is the major factor that leads to compatibility lists. It is possible for the ISP to not manage firmware but most don't want to take the risk as a malfunctioning modem can take down a neighborhood in some cases.
- londons_explore 6y ago
  > as a malfunctioning modem can take down a neighborhood The worst case scenario is a poorly secured cable modem gets infected by malware, then infects a bunch of other cable modems before switching to "take down the neighborhood" mode in which it transmits random garbage onto the cable. Since the cable is a shared resource, any misbehaving modem can prevent all others being able to connect. Perhaps just 1% vulnerable modems across the USA, and most people's home internet would be offline for weeks until whoever in every single neighborhood has an infected modem is identified and unplugged. Considering that, I can completely see why they wouldn't want you using a cheapo modem you got from Walmart.
  - martinald 6y ago
    Yeah I totally agree. One bad modem could take out/degrade internet for hundreds or thousands of customers connected to the same CMTS. It's actually surprising it doesn't happen more often. I don't see many (any?) people trying to connect their own GPON equipment to GPON fibre networks.
    - mmis1000 6y ago
      Probably only a few user that require sustained high speed transmission will want to do this. The equipment ISP provided isn't very powerful and will likely overheat and degrade the connection if you use it so violently. In most case I guess people just plug their own router after the GPON and don't bother what is the GPON doing.
      - londons_explore 6y ago
        > likely overheat and degrade the connection if you use it so violently. No need to transmit all the time to cause disruption... You could for example repeatedly transmit packet headers followed by a long break, and collision avoidance algorithms would stop any other device transmitting.

jcrawfordor 6y ago

DOCSIS authentication is based on the HFC-side MAC address of the modem (part of the DOCSIS management protocol) and TR-069 is not required for any basic functionality - it is typically only used to manage functionality that it not common in third-party modems like an integrated WiFi AP. The more complicated matter is that firmware is typically delivered to the modem via the DOCSIS management protocol (lower level than TR-069) and so the ISP must have firmware available for all supported modems. This is the major factor that leads to compatibility lists. It is possible for the ISP to not manage firmware but most don't want to take the risk as a malfunctioning modem can take down a neighborhood in some cases.

londons_explore 6y ago
> as a malfunctioning modem can take down a neighborhood The worst case scenario is a poorly secured cable modem gets infected by malware, then infects a bunch of other cable modems before switching to "take down the neighborhood" mode in which it transmits random garbage onto the cable. Since the cable is a shared resource, any misbehaving modem can prevent all others being able to connect. Perhaps just 1% vulnerable modems across the USA, and most people's home internet would be offline for weeks until whoever in every single neighborhood has an infected modem is identified and unplugged. Considering that, I can completely see why they wouldn't want you using a cheapo modem you got from Walmart.
- martinald 6y ago
  Yeah I totally agree. One bad modem could take out/degrade internet for hundreds or thousands of customers connected to the same CMTS. It's actually surprising it doesn't happen more often. I don't see many (any?) people trying to connect their own GPON equipment to GPON fibre networks.
  - mmis1000 6y ago
    Probably only a few user that require sustained high speed transmission will want to do this. The equipment ISP provided isn't very powerful and will likely overheat and degrade the connection if you use it so violently. In most case I guess people just plug their own router after the GPON and don't bother what is the GPON doing.
    - londons_explore 6y ago
      > likely overheat and degrade the connection if you use it so violently. No need to transmit all the time to cause disruption... You could for example repeatedly transmit packet headers followed by a long break, and collision avoidance algorithms would stop any other device transmitting.