4 ms·

The technical aspects of getting this done are pretty interesting, but I don't know why you'd do it. I'm not even sure I know what it does. I do all my routing

The technical aspects of getting this done are pretty interesting, but I don't know why you'd do it. I'm not even sure I know what it does. I do all my routing on my router. The cable modem is just the box that turns the square cable into the round cable.

tyingq 5y ago
The make/model appears to be a COMPAL CH7465LG, and it's got a 1.2GHz dual core CPU, a RealTek RTL8365MB switch chip, 4 GBE ports and WiFi, so it's arguably enough of a router in it's own right.
zrail 5y ago
OP has a combined router and modem, presumably without the ability to put it in bridge mode to run their own router.
- bombcar 5y ago
  And the route itself has 192.168.88 in it which smells mighty like MikroTik to me.
- pilif 5y ago
  I am familiar with the looks of this device as it’s in use at two locations I‘m providing in-family support for. At least in those two cases (different ISPs), it’s possible to turn the device into bridging mode
  - iforgotpassword 5y ago
    From the screenshot at the top it looks like they're using unitymedia. The funny thing is, at least in the past, that thing resets entirely if you disconnect it from power for some time, booting up with some old firmware revision afterwards. If you power it on then and quickly access the web interface, you'll see the option for bridge mode. Then it magically updates, and the option is gone. (this was a few years ago)
    - db_admin 5y ago
      As far as I know vodafone uses the same modem/router for all DOCSIS connections, but disables some funcionality (such as bridge mode) for 'ex-unitymedia' connections. It seems like the integration of both networks is quite a task and the bridge-mode feature is not a priority. How the bridge-mode is affected by the network backbone is unclear to me. IPv6 delegation also does not work for me.
dec0dedab0de 5y ago
I think it's more about getting root than adding a route. I assume the author is aware that he can purchase a separate router. DOCSIS hacking is highly frowned upon by cable companies, and the FBI. It's probably better to have a practical reason to do it, instead of "I wanted to see if I could."
- el_benhameen 5y ago
  I’m really curious about the fbi bit. Do you have any further reading?
  - xyzzy_plugh 5y ago
    I don't know about the FBI specifically but telecom equipment is regulated and in most places it's not legal to roll your own interface to the infrastructure. Even if you bring your own modem these days, it becomes administered remotely by your ISP. Similar to phreaking being a crime. Even if you have an agreement with your ISP, I'd expect you'd be breaking it and crossing into fraud or toll fraud at the least.
    - netr0ute 5y ago
      > telecom equipment is regulated This is tricky, because "telecom" only has POTS and cable TV within its scope. "Internet" service that just uses ethernet technologies are their own separate thing, and why "Ma Bell" megacorps can get away with their junk Internet service because it's regulated differently than POTS.
    - mschuster91 5y ago
      > I don't know about the FBI specifically but telecom equipment is regulated and in most places it's not legal to roll your own interface to the infrastructure. In the EU, the Directive 2015/2120 [1] enforces the ability of customers to bring their own modems, no matter if you are running fiber, xDSL or DOCSIS. [1]: https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=celex%3A32015R2120 https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=celex%3A...
dave9 5y ago
To add a static route to the modem's routing table.
- zachberger 5y ago
  But why do this on the modem, why not on the router?
  - deleted 5y ago
    [deleted]
  - detaro 5y ago
    It is the router.
  - stephen_g 5y ago
    Looking at the screenshots of the admin panel (and the fact that pictures further down seem to show switch ports) it seems that this is a modem/router/switch combo. Unlike many providers that just provide a modem with no router functionality and just an Ethernet port. It still would be easier to just put it into bridge mode if that's an option and use a better router, it is still an interesting hacking project!

tyingq 5y ago

The make/model appears to be a COMPAL CH7465LG, and it's got a 1.2GHz dual core CPU, a RealTek RTL8365MB switch chip, 4 GBE ports and WiFi, so it's arguably enough of a router in it's own right.

zrail 5y ago

OP has a combined router and modem, presumably without the ability to put it in bridge mode to run their own router.

bombcar 5y ago
And the route itself has 192.168.88 in it which smells mighty like MikroTik to me.
pilif 5y ago
I am familiar with the looks of this device as it’s in use at two locations I‘m providing in-family support for. At least in those two cases (different ISPs), it’s possible to turn the device into bridging mode
- iforgotpassword 5y ago
  From the screenshot at the top it looks like they're using unitymedia. The funny thing is, at least in the past, that thing resets entirely if you disconnect it from power for some time, booting up with some old firmware revision afterwards. If you power it on then and quickly access the web interface, you'll see the option for bridge mode. Then it magically updates, and the option is gone. (this was a few years ago)
  - db_admin 5y ago
    As far as I know vodafone uses the same modem/router for all DOCSIS connections, but disables some funcionality (such as bridge mode) for 'ex-unitymedia' connections. It seems like the integration of both networks is quite a task and the bridge-mode feature is not a priority. How the bridge-mode is affected by the network backbone is unclear to me. IPv6 delegation also does not work for me.

dec0dedab0de 5y ago

I think it's more about getting root than adding a route. I assume the author is aware that he can purchase a separate router. DOCSIS hacking is highly frowned upon by cable companies, and the FBI. It's probably better to have a practical reason to do it, instead of "I wanted to see if I could."

el_benhameen 5y ago
I’m really curious about the fbi bit. Do you have any further reading?
- xyzzy_plugh 5y ago
  I don't know about the FBI specifically but telecom equipment is regulated and in most places it's not legal to roll your own interface to the infrastructure. Even if you bring your own modem these days, it becomes administered remotely by your ISP. Similar to phreaking being a crime. Even if you have an agreement with your ISP, I'd expect you'd be breaking it and crossing into fraud or toll fraud at the least.
  - netr0ute 5y ago
    > telecom equipment is regulated This is tricky, because "telecom" only has POTS and cable TV within its scope. "Internet" service that just uses ethernet technologies are their own separate thing, and why "Ma Bell" megacorps can get away with their junk Internet service because it's regulated differently than POTS.
  - mschuster91 5y ago
    > I don't know about the FBI specifically but telecom equipment is regulated and in most places it's not legal to roll your own interface to the infrastructure. In the EU, the Directive 2015/2120 [1] enforces the ability of customers to bring their own modems, no matter if you are running fiber, xDSL or DOCSIS. [1]: https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=celex%3A32015R2120 https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=celex%3A...

dave9 5y ago

To add a static route to the modem's routing table.

zachberger 5y ago
But why do this on the modem, why not on the router?
- deleted 5y ago
  [deleted]
- detaro 5y ago
  It is the router.
- stephen_g 5y ago
  Looking at the screenshots of the admin panel (and the fact that pictures further down seem to show switch ports) it seems that this is a modem/router/switch combo. Unlike many providers that just provide a modem with no router functionality and just an Ethernet port. It still would be easier to just put it into bridge mode if that's an option and use a better router, it is still an interesting hacking project!