I’ve Only Seen This Once, And It Came From A Cisco Security Device

daniel@kairin .ssh $ ssh pix@192.168.1.x Warning: use of DES is strongly discouraged due to cryptographic weaknesses pix@192.168.1.x’s password:

The only thing I’ve ever touched that uses an SSH version from the 1940’s, and it’s a Cisco PIX. Fitting.

OpenSSH doesn’t even support it by default; I had to create an ~/.ssh/config file and explicitly tell it to use DES. My local SSH install did everything but spit on me to keep me from doing so.