On 31/03/2020 15:21, Salz, Rich via openssl-users wrote: > Isn't this the SSL EOF thing? No. In older OpenSSL's SSL_read() would return SSL_ERROR_SYSCALL on EOF with an errno of 0. This was "fixed" in 1.1.1e to return SSL_ERROR_SSL with an entry on the error stack. And unfixed in 1.1.1f to revert to the old behaviour (but 3.0 still does this). So - if it was due to "the SSL EOF thing" then you would be seeing SSL_ERROR_SSL. Matt