I connect to the Internet using a proxy at my university residence and I noticed at some sites (like my bank and PayPal), the browser reports that:
- it's unable to check if the website certificate has been revoked
- the encryption is using an obsolete cipher suite
I've checked the same sites on different networks, but there is no such issue. I spoke to someone in charge, who say that it happens for some sites sometimes when behind a proxy. I don't believe that, but I do not know enough to call it out. Also sites like GMail and Outlook don't have such issues.
Is this true? If not, how can I check if indeed my connection is being compromised.