Hi, I upgraded my Stunnel server machine to CentOS 6.8 and post upgrade , the stunnel too got upgraded to stunnel 4.29 on x86_64-redhat-linux-gnu with OpenSSL 1.0.1e-fips 11 Feb 2013 .

Now since then many of the stunnel client using newer stunnel client (those uses TLSv1.2 for Negotiation) are not able to connect .

I get below error on the server in logs

RSA_sign:digest too big for rsa key:rsa_sign’

How to fix this please?

Regards, Vikrant