Just checked from Germany and looks good from my point of the internet bubble.

problem no longer occurs, but
maybe some mirrors out of date ?

Hi
mhhh, DNS issue ?
for me debian.opennms.org is resolved to 46.101.211.239 and things seems to be working
unfortunately I did't checked the IP when things weren't working,
anyway if I point my browser to http://debian.opennms.org/dists/OPENNMS-GPG-KEY I can still access to the expired OPENNMS-GPG-KEY
(OPENNMS-GPG-KEY 2015-01-21 15:48 1.7K), maybe there is a mirror out-of-date ?

hint: opening a mirror with browser I get a warning message from my provider (see attached screenshot)

anyway for me the issue can be closed now

Just ran this here against ny-1.mirrors.opennms.org

https://www.ssllabs.com/ssltest/analyze.html?d=debian.opennms.org&s=45.55.163.22

It's not super great but B graded and should work against

• de-1.mirrors.opennms.org

• debian-mirror.internal.opennms.com

• debian.mirrors.opennms.org

• debian.opennms.org

• docs.mirrors.opennms.org

• docs.opennms.org

• maven-mirror.internal.opennms.com

• maven.mirrors.opennms.org

• mirror.internal.opennms.com

• ny-1.mirrors.opennms.org

• repo.opennms.org

• sf-1.mirrors.opennms.org

• tiles.mirrors.opennms.org

• tiles.opennms.org

• uk-1.mirrors.opennms.org

• xmlns.mirrors.opennms.org

• xmlns.opennms.org

• yum-mirror.internal.opennms.com

• yum.mirrors.opennms.org

• yum.opennms.org/

Carlo, I'm sorry you are experiencing this problem. I have not been able to replicate your issue yet. Can you please let me know the IP address that you are resolving for debian.opennms.org? This will help me better troubleshoot which mirror might be causing an issue for you. I have tested against each of our mirrors and have not had an ssl error. Here is a sample result of my own testing:

Let me know the IP address of the mirror you are reaching and I will investigate further.