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- # general
- (gen) banner: SSH-2.0-OpenSSH_7.7
- (gen) software: OpenSSH 7.7
- (gen) compatibility: OpenSSH 7.3+, Dropbear SSH 2016.73+
- (gen) compression: enabled (zlib@openssh.com)
- # key exchange algorithms
- (kex) curve25519-sha256 -- [warn] unknown algorithm
- (kex) curve25519-sha256@libssh.org -- [info] available since OpenSSH 6.5, Dropbear SSH 2013.62
- (kex) ecdh-sha2-nistp256 -- [fail] using weak elliptic curves
- `- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
- (kex) ecdh-sha2-nistp384 -- [fail] using weak elliptic curves
- `- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
- (kex) ecdh-sha2-nistp521 -- [fail] using weak elliptic curves
- `- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
- (kex) diffie-hellman-group-exchange-sha256 -- [warn] using custom size modulus (possibly weak)
- `- [info] available since OpenSSH 4.4
- (kex) diffie-hellman-group16-sha512 -- [info] available since OpenSSH 7.3, Dropbear SSH 2016.73
- (kex) diffie-hellman-group18-sha512 -- [info] available since OpenSSH 7.3
- (kex) diffie-hellman-group14-sha256 -- [info] available since OpenSSH 7.3, Dropbear SSH 2016.73
- (kex) diffie-hellman-group14-sha1 -- [warn] using weak hashing algorithm
- `- [info] available since OpenSSH 3.9, Dropbear SSH 0.53
- # host-key algorithms
- (key) ssh-rsa -- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28
- (key) rsa-sha2-512 -- [info] available since OpenSSH 7.2
- (key) rsa-sha2-256 -- [info] available since OpenSSH 7.2
- (key) ecdsa-sha2-nistp256 -- [fail] using weak elliptic curves
- `- [warn] using weak random number generator could reveal the key
- `- [info] available since OpenSSH 5.7, Dropbear SSH 2013.62
- (key) ssh-ed25519 -- [info] available since OpenSSH 6.5
- # encryption algorithms (ciphers)
- (enc) chacha20-poly1305@openssh.com -- [info] available since OpenSSH 6.5
- `- [info] default cipher since OpenSSH 6.9.
- (enc) aes128-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
- (enc) aes192-ctr -- [info] available since OpenSSH 3.7
- (enc) aes256-ctr -- [info] available since OpenSSH 3.7, Dropbear SSH 0.52
- (enc) aes128-gcm@openssh.com -- [info] available since OpenSSH 6.2
- (enc) aes256-gcm@openssh.com -- [info] available since OpenSSH 6.2
- # message authentication code algorithms
- (mac) umac-64-etm@openssh.com -- [warn] using small 64-bit tag size
- `- [info] available since OpenSSH 6.2
- (mac) umac-128-etm@openssh.com -- [info] available since OpenSSH 6.2
- (mac) hmac-sha2-256-etm@openssh.com -- [info] available since OpenSSH 6.2
- (mac) hmac-sha2-512-etm@openssh.com -- [info] available since OpenSSH 6.2
- (mac) hmac-sha1-etm@openssh.com -- [warn] using weak hashing algorithm
- `- [info] available since OpenSSH 6.2
- (mac) umac-64@openssh.com -- [warn] using encrypt-and-MAC mode
- `- [warn] using small 64-bit tag size
- `- [info] available since OpenSSH 4.7
- (mac) umac-128@openssh.com -- [warn] using encrypt-and-MAC mode
- `- [info] available since OpenSSH 6.2
- (mac) hmac-sha2-256 -- [warn] using encrypt-and-MAC mode
- `- [info] available since OpenSSH 5.9, Dropbear SSH 2013.56
- (mac) hmac-sha2-512 -- [warn] using encrypt-and-MAC mode
- `- [info] available since OpenSSH 5.9, Dropbear SSH 2013.56
- (mac) hmac-sha1 -- [warn] using encrypt-and-MAC mode
- `- [warn] using weak hashing algorithm
- `- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28
- # algorithm recommendations (for OpenSSH 7.7)
- (rec) -ecdh-sha2-nistp521 -- kex algorithm to remove
- (rec) -ecdh-sha2-nistp384 -- kex algorithm to remove
- (rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove
- (rec) -ecdh-sha2-nistp256 -- kex algorithm to remove
- (rec) -diffie-hellman-group-exchange-sha256 -- kex algorithm to remove
- (rec) -ecdsa-sha2-nistp256 -- key algorithm to remove
- (rec) -hmac-sha2-512 -- mac algorithm to remove
- (rec) -umac-128@openssh.com -- mac algorithm to remove
- (rec) -hmac-sha2-256 -- mac algorithm to remove
- (rec) -umac-64@openssh.com -- mac algorithm to remove
- (rec) -hmac-sha1 -- mac algorithm to remove
- (rec) -hmac-sha1-etm@openssh.com -- mac algorithm to remove
- (rec) -umac-64-etm@openssh.com -- mac algorithm to remove
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