Go to Authentication and select the Parameters tab. In the Public-Key Authentication section's Signature algorithms list, select ecdsa-sha2-nistp256, ecdsa-sha2-nistp384 and ecdsa-sha2-nistp521. The algorithms will be highlighted blue when enabled.

Figure 2.5. Enabling elliptic curve public-key signature algorithms for Tectia Server

Click Apply.

For immediate effect, stop and start Tectia Server.