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@XYZXYZXYZ(kodomo daigaku)

sshの裏知識

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Last updated at Posted at 2025-08-01

SSHの裏知識

sshd_config

# Ciphers and keying
#RekeyLimit default none

kexalgorithms curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128
MACs hmac-sha1,umac-64@openssh.com,hmac-ripemd160


ssh -vvv -oMACs=hmac-md5 ユーザ名@サーバ名

ssh -vvv -oCiphers=aes128-cbc ユーザ名@サーバ名
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