We use Cowrie to emulate an SSH and Telnet server for our honeypots. Cowrie is great software maintained by Michel Oosterhof [1]. The honeypot is a reasonable emulation of such a server, easy to maintain, and very feature-rich for even more advanced analysis. We only use it in its simplest form for our DShield sensor.
Article Link: https://isc.sans.edu/diary/rss/30604