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Expiration of cable modem certificate

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deividfiguer
Expiration of cable modem certificate

Hi

We noticed an message from one of our providers that on May 2021 we could
have problems with cable modems to complete BPI+ authentication. I attach information

How can I know which is the expiration date of the cable modem certificate?

I am attentive to your responses, Thanks

regards

fschlums
You can read it from a modem

You can read it from a modem by snmp:
snmpget -v2c -c DOCS-IETF-BPI2-MIB::docsBpi2CmDeviceManufCert.2 | sed -e 's/DOCS.*Hex-STRING: //' | xxd -r -ps | openssl x509 -inform DER -text | grep After
Think I found it here in a earlier post.

mt239
Python script

If you are familiar with Python, I have a quick and dirty script that will take a list of IP's, and output a CSV with the expiration, firmware, CMAC, model.

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