13-10-2021, 02:50 AM
(11-10-2021, 04:37 PM)elbarto Wrote: Some firms based in opensource linux soft has been modified to change nvram DB e.g. mac, serial, certfs, enable or disable bpi+/telnet/ssh/snmp and to force config file (not working in ISP with dinamic shared secret or other security).
But production programs that start up and keep comunication like dmg_provisioning, dispatcher, etc has not been modified.
+info;
http://index-of.es/Magazines/EN-Hacking%...0Modem.pdf
https://www.cisco.com/c/en/us/td/docs/ca...000010.pdf
https://www.forocable.com/foro/threads/4...se-11-quot
Forceware has a modified dmg_provisioning service. To answer your question OP, the speed limit for download is enforced by the CMTS and the speed limit on upload is enforced by the cable modem. In some CMTS, the upload is also enforced on the CMTS in addition.
So, what this means is that you can uncap upload, but not download because you don't control your ingress speed, the CMTS does.
This is what forceware's Sflow zero feature does. But, this doesn't work on many ISPs today because most CMTS also enforce egress speed nowadays.