ERROR: SSL says error 7 : certificate signature failure

Alan DeKok aland at
Wed Jun 29 15:17:13 CEST 2016

On Jun 28, 2016, at 10:04 PM, craig <craig at> wrote:
> 802.1x Authentication with EAP-TLS, works perfectly with a Centos
> client, however not from a Cisco IP Phone.

  The phone doesn't like the server certificate.

  This can be because the phone software is too old, and doesn't understand new message digests.

> I'm just after advice on how to solve the "certificate signature failure" error?

  Try a different server certificate.

  Alan DeKok.

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