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Oracle Linux: Fails To Register Server With The Unbreakable Linux Network (ULN) (Doc ID 2463299.1)

Last updated on JUNE 01, 2020

Applies to:

Linux OS - Version Oracle Linux 5.11 and later
Linux x86-64


While trying to register a server with the Unbreakable Network, the registration fails with a certificate error.

# up2date --register
There was an SSL error: [('SSL routines', 'SSL3_GET_SERVER_CERTIFICATE', 'certificate verify failed')]

A common cause of this error is the system time being incorrect. Verify that the time on this system is correct.

The network traffic captured between the server and the http proxy, for example running:

# tcpdump -i bond0 -s0 -w uln1.cap host _proxy_ip_address_or_name_
was analyzed using wireshark and show a ssl issuer certificate:
Certificate (id-at-commonName=EXAMPLE.COM,id-at-organizationalUnitName=EXAMPLE-Unit,id-at-organizationName=EXAMPLE Corp,id-at-countryName=XX) 


 The ULN-CA-CERT has been updated as described in the document ULN-CA-CERT to be Updated With SHA-2 Certificates on December 15, 2016 (Doc ID 2207336.1)


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