# general (gen) banner: SSH-2.0-OpenSSH_5.6 (gen) software: OpenSSH 5.6 (gen) compatibility: OpenSSH 5.6-6.6, Dropbear SSH 0.53+ (some functionality from 0.52) (gen) compression: enabled (zlib@openssh.com) # key exchange algorithms (kex) diffie-hellman-group-exchange-sha256 (1024-bit) -- [fail] using small 1024-bit modulus  `- [warn] does not provide protection against post-quantum attacks `- [info] available since OpenSSH 4.4 (kex) diffie-hellman-group-exchange-sha1 (1024-bit) -- [fail] using small 1024-bit modulus  `- [warn] does not provide protection against post-quantum attacks `- [info] available since OpenSSH 2.3.0 (kex) diffie-hellman-group14-sha1 -- [fail] using broken SHA-1 hash algorithm  `- [warn] 2048-bit modulus only provides 112-bits of symmetric strength  `- [warn] does not provide protection against post-quantum attacks `- [info] available since OpenSSH 3.9, Dropbear SSH 0.53 (kex) diffie-hellman-group1-sha1 -- [fail] using small 1024-bit modulus  `- [fail] vulnerable to the Logjam attack: https://en.wikipedia.org/wiki/Logjam_(computer_security)  `- [fail] using broken SHA-1 hash algorithm  `- [warn] does not provide protection against post-quantum attacks `- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28 `- [info] removed in OpenSSH 6.9: https://www.openssh.com/txt/release-6.9 # host-key algorithms (key) ssh-rsa (1024-bit) -- [fail] using broken SHA-1 hash algorithm  `- [fail] using small 1024-bit modulus `- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.28 `- [info] deprecated in OpenSSH 8.8: https://www.openssh.com/txt/release-8.8 (key) ssh-rsa-cert-v01@openssh.com (1024-bit cert/1024-bit RSA CA) -- [fail] using broken SHA-1 hash algorithm  `- [fail] using small 1024-bit hostkey modulus  `- [fail] using small 1024-bit CA key modulus `- [info] available since OpenSSH 5.6 `- [info] deprecated in OpenSSH 8.8: https://www.openssh.com/txt/release-8.8 # encryption algorithms (ciphers) (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) arcfour256 -- [fail] using broken RC4 cipher `- [info] available since OpenSSH 4.2 (enc) arcfour128 -- [fail] using broken RC4 cipher `- [info] available since OpenSSH 4.2 (enc) aes128-cbc -- [warn] using weak cipher mode `- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.28 (enc) 3des-cbc -- [fail] using broken & deprecated 3DES cipher  `- [warn] using weak cipher mode  `- [warn] using small 64-bit block size `- [info] available since OpenSSH 1.2.2, Dropbear SSH 0.28 (enc) blowfish-cbc -- [fail] using weak & deprecated Blowfish cipher  `- [warn] using weak cipher mode  `- [warn] using small 64-bit block size `- [info] available since OpenSSH 1.2.2, Dropbear SSH 0.28 (enc) cast128-cbc -- [fail] using weak & deprecated CAST cipher  `- [warn] using weak cipher mode  `- [warn] using small 64-bit block size `- [info] available since OpenSSH 2.1.0 (enc) aes192-cbc -- [warn] using weak cipher mode `- [info] available since OpenSSH 2.3.0 (enc) aes256-cbc -- [warn] using weak cipher mode `- [info] available since OpenSSH 2.3.0, Dropbear SSH 0.47 (enc) arcfour -- [fail] using broken RC4 cipher `- [info] available since OpenSSH 2.1.0 (enc) rijndael-cbc@lysator.liu.se -- [fail] using deprecated & non-standardized Rijndael cipher  `- [warn] using weak cipher mode `- [info] available since OpenSSH 2.3.0 `- [info] disabled in OpenSSH 7.0: https://www.openssh.com/txt/release-7.0 # message authentication code algorithms (mac) hmac-md5 -- [fail] using broken MD5 hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28 (mac) hmac-sha1 -- [fail] using broken SHA-1 hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.1.0, Dropbear SSH 0.28 (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) hmac-ripemd160 -- [fail] using deprecated RIPEMD hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.5.0 (mac) hmac-ripemd160@openssh.com -- [fail] using deprecated RIPEMD hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.1.0 (mac) hmac-sha1-96 -- [fail] using broken SHA-1 hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.5.0, Dropbear SSH 0.47 (mac) hmac-md5-96 -- [fail] using broken MD5 hash algorithm  `- [warn] using encrypt-and-MAC mode `- [info] available since OpenSSH 2.5.0 # fingerprints (fin) ssh-rsa: SHA256:YZ457EBcJTSxRKI3yXRgtAj3PBf5B9/F36b1SVooml4 # algorithm recommendations (for OpenSSH 5.6) (rec) !diffie-hellman-group-exchange-sha256 -- kex algorithm to change (increase modulus size to 3072 bits or larger)  (rec) -3des-cbc -- enc algorithm to remove  (rec) -arcfour -- enc algorithm to remove  (rec) -arcfour128 -- enc algorithm to remove  (rec) -arcfour256 -- enc algorithm to remove  (rec) -blowfish-cbc -- enc algorithm to remove  (rec) -cast128-cbc -- enc algorithm to remove  (rec) -diffie-hellman-group-exchange-sha1 -- kex algorithm to remove  (rec) -diffie-hellman-group1-sha1 -- kex algorithm to remove  (rec) -diffie-hellman-group14-sha1 -- kex algorithm to remove  (rec) -hmac-md5 -- mac algorithm to remove  (rec) -hmac-md5-96 -- mac algorithm to remove  (rec) -hmac-ripemd160 -- mac algorithm to remove  (rec) -hmac-ripemd160@openssh.com -- mac algorithm to remove  (rec) -hmac-sha1 -- mac algorithm to remove  (rec) -hmac-sha1-96 -- mac algorithm to remove  (rec) -rijndael-cbc@lysator.liu.se -- enc algorithm to remove  (rec) -ssh-rsa -- key algorithm to remove  (rec) -ssh-rsa-cert-v01@openssh.com -- key algorithm to remove  (rec) -aes128-cbc -- enc algorithm to remove  (rec) -aes192-cbc -- enc algorithm to remove  (rec) -aes256-cbc -- enc algorithm to remove  (rec) -umac-64@openssh.com -- mac algorithm to remove  # additional info (nfo) For hardening guides on common OSes, please see: