It makes use of a 768 bit Diffie-Hellman group, which can be breakable by governments right now. Much larger teams are likely ok. Modern OpenSSH variations have disabled this team by default. See sshd_config for configuring what important exchanges to implement. All Bitvise command-line customers support all authentication strategies supported https://clients1.google.com.ar/url?sa=t&url=http://sshstores.net