Difference between revisions of "OpenBIS change of minimal TLS version required for connections"
(Created page with "==Introduction== On the Euler cluster, users can use the PyBIS package to connect to OpenBIS instances. PyBIS uses OpenSSL to make connections from the Euler cluster to OpenBI...")
Revision as of 13:04, 30 June 2022
On the Euler cluster, users can use the PyBIS package to connect to OpenBIS instances. PyBIS uses OpenSSL to make connections from the Euler cluster to OpenBIS instances. OpenSSL uses the TLS protocol to make connections to remote servers. Since today, OpenBIS has a requirement that only connections with TLS 1.3 are accepted. The default OpenSSL library on Euler does only support up to TLS 1.2 and therefore almost all versions of PyBIS are not working any more.
The most recent Python installation on Euler (3.10.4) was built with the newer OpenSSL version provided by CentOS 7.9, which supports TLS 1.3. It has PyBIS 1.36.3 installed (https://scicomp.ethz.ch/wiki/Python_on_Euler#python_gpu.2F3.10.4)
module load gcc/8.2.0 python/3.10.4
All older Python installations can only use TLS 1.2. Therefore if you are using PyBIS on Euler, then please migrate your workflow to Python 3.10.4.