SHA1 certificates for secure SSL/TLS communications are deprecated due to known computational vulnerabilities. To ensure secure communications, a forced deprecation sounds reasonable (i.e. refuse to connect to these). That has the side effect that it will lock out many users who are unable to use stronger hashes such as SHA256. However, if a fallback to SHA1 is provided (as Facebook is proposing), everyone will be vulnerable to SHA1 downgrade man-in-the-middle attacks.
What to do?
(Score: 1, Insightful) by Anonymous Coward on Friday December 11 2015, @05:59PM
What's wrong with using an old browser to access that router, and a new one for accessing the internet? It even gives you additional security, as an internet exploit won't be able to access your local router even if you're logged into it during browsing the net.