On a server that's been running SMT properly for years, SMT has not been able to update since the beginning of the month. The credentials are valid through November 2015, and I verified that the credentials are current. Does anyone have any ideas as to what I should investigate?

The log output is

Downloading Product information
Failed to POST 'https://secure-www.novell.com/center/regsvc/?command=regdata&lang=en-US&version=1.0': 500 CURL ERROR(35) SSL connect error
Error while fetching Products data.
Downloading Target information
Failed to POST 'https://secure-www.novell.com/center/regsvc/?command=regdata&lang=en-US&version=1.0': 500 CURL ERROR(35) SSL connect error
Error while fetching Targets data.
Downloading repository information
Failed to POST 'https://secure-www.novell.com/center/regsvc/?command=regdata&lang=en-US&version=1.0': 500 CURL ERROR(35) SSL connect error
Error while fetching repository data.
Downloading Product/Repository relations
Failed to POST 'https://secure-www.novell.com/center/regsvc/?command=regdata&lang=en-US&version=1.0': 500 CURL ERROR(35) SSL connect error
Error while fetching ProductCatalogs data.
Downloading Subscription information
Invalid response:500 CURL ERROR(35) SSL connect error
List subscriptions request failed.
Error while fetching Subscription data.
Downloading Registration information
Invalid response:500 CURL ERROR(35) SSL connect error
List registrations request failed.
Error while fetching Registration data.
Flagged repositories which can be mirrored

The host is (and has been) behind a firewall, and we run the updates once a week. The logs show it was working up until end of February, and the first failure happened on 3/1/2015. Any ideas as to what I should be investigating?