Enable SSH service for ESXi server

• Login to the server using vShphere client
• Select the host --> Configuration tab --> Security Profile --> Properties in the Services part

• In the Services Properties dialog, select SSH and then click to Options

• In SSH (TSM-SSH) Options dialog, select "Start and stop with host" and then press Start button

• That is for starting SSH server. You may also need to start SSH client. Again, in the Security Profile, select Properties in the Firewall part

• Select SSH client