解决方式 在 .ssh/config 加 Host * KexAlgorithms [email protected] 就可以 ssh [email protected] ssh -vvv log 如下 OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 58: Applying options for * debug2: resolving "bbs.ptt.cc" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to bbs.ptt.cc [140.112.172.11] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_rsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /root/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.4 debug1: Remote protocol version 2.0, remote software version bbs-sshd debug1: no match: bbs-sshd debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to bbs.ptt.cc:22 as 'bbsu' debug3: send packet: type 20 debug1: SSH2_MSG_KEXINIT sent debug3: receive packet: type 20 debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,[email protected],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,diffie-hellman-group1-sha1,ext-info-c debug2: host key algorithms: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-dss debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,[email protected],zlib debug2: compression stoc: none,[email protected],zlib debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug2: peer server KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,[email protected],diffie-hellman-group16-sha512,diffie-hellman-group14-sha256,ext-info-s,[email protected] debug2: host key algorithms: ssh-ed25519,ecdsa-sha2-nistp256,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: [email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr debug2: ciphers stoc: [email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr debug2: MACs ctos: [email protected],[email protected],hmac-sha2-512,hmac-sha2-256,[email protected],hmac-sha1 debug2: MACs stoc: [email protected],[email protected],hmac-sha2-512,hmac-sha2-256,[email protected],hmac-sha1 debug2: compression ctos: none debug2: compression stoc: none debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none debug1: kex: curve25519-sha256 need=64 dh_need=64 debug1: kex: curve25519-sha256 need=64 dh_need=64 debug3: send packet: type 30 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY 麻烦站方再看一下,要怎设定才能连. ※ 引述《wens (文思)》之铭言： : 由於批踢踢 SSH 原先使用的 RSA 金钥长度已不符现今最短长度要求，因此予以更换。 : 以下为新的 RSA 金钥的指纹： : 3072 SHA256:9/gkjxWjuteMj//K0sRo1gj7h5qTp0HPIH3n7+e3Jqc [email protected] (RSA) : +---[RSA 3072]----+ : | | : | | : | | : | .. | : | . Soo=+ | : | o.*=*+o | : | .=*B= | : | o+BX=o oo| : | *Bo=BEO++| : +----[SHA256]-----+ : 同时并将现行 SSH 金钥指纹登载於 DNS SSHFP 纪录。 --

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