Update: Following updates to our server, this process should no longer be necessary.

1. Open Terminal
2. Type the following and press enter: mkdir .ssh
3. Type the following and press enter: pico .ssh/config
4. Type (or copy and paste) the following code in the document:host *kexalgorithms +diffie-hellman-group1-sha1
5. Press Control + O  — this will attempt to save the file. To confirm, press the Enter key
6. Press Control + X to exit
7. Now, try connecting to the Writing Server as expected, i.e. ssh yourpennkey@writing.upenn.edu
8. If prompted about the authenticity of the host, simply type “yes” and press enter