查看 SSH Server 支持的 ciphers 等

发表于 更新于 Disqus： 
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nmap --script ssh2-enum-algos -sV -p <port> <host>

很好用，结果一目了然

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PORT      STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 4.3 (protocol 2.0)
| ssh2-enum-algos:
|   kex_algorithms: (3)
|       diffie-hellman-group-exchange-sha1
|       diffie-hellman-group14-sha1
|       diffie-hellman-group1-sha1
|   server_host_key_algorithms: (2)
|       ssh-rsa
|       ssh-dss
|   encryption_algorithms: (13)
|       aes128-ctr
|       aes192-ctr
|       aes256-ctr
|       arcfour256
|       arcfour128
|       aes128-cbc
|       3des-cbc
|       blowfish-cbc
|       cast128-cbc
|       aes192-cbc
|       aes256-cbc
|       arcfour
|       [email protected]
|   mac_algorithms: (6)
|       hmac-md5
|       hmac-sha1
|       hmac-ripemd160
|       [email protected]
|       hmac-sha1-96
|       hmac-md5-96
|   compression_algorithms: (2)
|       none
|_      [email protected]

附一些为了兼容老版本 SSH 的配置

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KexAlgorithms +diffie-hellman-group1-sha1
HostKeyAlgorithms +ssh-rsa
PubkeyAcceptedKeyTypes +ssh-rsa