To enable ECDH key exchange algorithms for Tectia Server, do the following:

1. Go to Connections and Encryption and select the Parameters tab. In the Encryption section's KEXs list, select ECDH-NISTP256, ECDH-NISTP384 and ECDH-NISTP521. The algorithms will be highlighted blue when enabled.

   

   Figure 2.8. Enabling Elliptic Curve Diffie–Hellman KEXs for Tectia Server

2. Click Apply.

3. For immediate effect, stop and start Tectia Server.