Thread: *ALL* ntl 10Mb Discussion (Part 3)
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Old 18-11-2005, 09:57   #558
Acathla
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Re: *ALL* ntl 10MB Discussion (Part 3)
OK had a play about for some info on ignoreProvisioningUpgrade

Quote:
Firmware upgrades are done from the provider side, meaning it would be quite easy for affected modems to be fixed with a new release
Quote:
Preventing the firmware upgrade, or downgrading the firmware, is trivial (docsDevSwAdminStatus -> ignoreProvisioningUpgrade)
Quote:
From a network management station, the operator:
sets docsDevSwServer to the address of the TFTP server for software upgrades
sets docsDevSwFilename to the file pathname of the software upgrade image
sets docsDevSwAdminStatus to upgrade-from-mgt
Quote:
If set to upgradeFromMgt(1), the device will initiate a TFTP software image download using docsDevSwFilename. After successfully receiving an image, the device will set its state to ignoreProvisioningUpgrade(3) and reboot. If the download process is interrupted by a reset or power failure, the device will load the previous image and, after re-initialization, continue to attempt loading the image specified in docsDevSwFilename.

If set to allowProvisioningUpgrade(2), the device will use the software version information supplied by the provisioning server when next rebooting (this does not cause a reboot).

When set to ignoreProvisioningUpgrade(3), the device will disregard software image upgrade information from the provisioning server.

Note that reading this object can return upgradeFromMgt(1). This indicates that a software download is currently in progress, and that the device will reboot after successfully receiving an image.

At initial startup, this object has the default value of allowProvisioningUpgrade(2)."
Now this is just a rehash of information but from what I understand is that when your modem is NEW it is set to allowProvisioningUpgrade and it checks the server for a firmware and downloads and installs it and sets to ignoreProvisioningUpgrade.

When NTL decide that you need a speed change (downgrade OR upgrade) they send a signal to your modem to go to allowProvisioningUpgrade then either send a signal to reboot or ask you to reboot. Modem reboots and checks server for a new firmware/software downloads installs and reboots.

So, if you are set to ignoreProvisioningUpgrade you are at the hands of NTL untill they decide you are allowed the upgrade. If you have allowProvisioningUpgrade, REBOOT! as you just be have been permitted to the upgrade.

I may be completely wrong and probably are but what do others think?

Reference: http://seclists.org/lists/vuln-dev/2002/Mar/0161.html
Reference: http://rfc.slim.summitmedia.co.uk/rfc2669.html
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