ssh“不正确的签名”,而连接到服务器

我有一个服务器,我通常连接到从多个笔记本电脑,一些FC22,FC23,或Ubuntu的。 我安装了一台全新的笔记本电脑FC23,在authorized_keys中添加了相关的键:

[mathieu@xps13 code]$ ssh -vvv root@ovh6 OpenSSH_7.2p2, OpenSSL 1.0.2g-fips 1 Mar 2016 debug1: Reading configuration data /home/mathieu/.ssh/config debug1: /home/mathieu/.ssh/config line 5: Applying options for * debug1: /home/mathieu/.ssh/config line 71: Applying options for ovh6 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 58: Applying options for * debug2: resolving "XXXXXXXXXXXXXXX" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to XXXXXXXXXXXXXXX [YYYYYYYYYYYY] port 22. debug1: Connection established. debug1: identity file /home/mathieu/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/mathieu/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.9 debug1: match: OpenSSH_6.9 pat OpenSSH* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to ns427784.ip-37-187-149.eu:22 as 'root' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal debug2: KEX algorithms: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c debug2: host key algorithms: [email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa,[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519 debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-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: diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1 debug2: host key algorithms: ssh-rsa debug2: ciphers ctos: [email protected],[email protected],aes256-ctr,aes128-ctr debug2: ciphers stoc: [email protected],[email protected],aes256-ctr,aes128-ctr debug2: MACs ctos: [email protected],[email protected],[email protected],hmac-sha2-512,hmac-sha2-256,hmac-ripemd160 debug2: MACs stoc: [email protected],[email protected],[email protected],hmac-sha2-512,hmac-sha2-256,hmac-ripemd160 debug2: compression ctos: none,[email protected] debug2: compression stoc: none,[email protected] debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: diffie-hellman-group-exchange-sha256 debug1: kex: host key algorithm: ssh-rsa debug1: kex: server->client cipher: aes128-ctr MAC: [email protected] compression: none debug1: kex: client->server cipher: aes128-ctr MAC: [email protected] compression: none debug1: kex: diffie-hellman-group-exchange-sha256 need=16 dh_need=16 debug1: kex: diffie-hellman-group-exchange-sha256 need=16 dh_need=16 debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent debug1: got SSH2_MSG_KEX_DH_GEX_GROUP debug2: bits set: 1541/3072 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: got SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: ssh-rsa SHA256:3dFTH1Rbkf+Y4PyYWfyPFkmZoxepgsdJnKgSikaSqEs debug3: hostkeys_foreach: reading file "/home/mathieu/.ssh/known_hosts" debug3: record_hostkey: found key type RSA in file /home/mathieu/.ssh/known_hosts:4 debug3: load_hostkeys: loaded 1 keys from XXXXXXX debug3: hostkeys_foreach: reading file "/home/mathieu/.ssh/known_hosts" debug3: record_hostkey: found key type RSA in file /home/mathieu/.ssh/known_hosts:4 debug3: load_hostkeys: loaded 1 keys from 37.187.149.109 debug1: Host 'XXXXXXXXXXXX' is known and matches the RSA host key. debug1: Found key in /home/mathieu/.ssh/known_hosts:4 debug2: bits set: 1569/3072 ssh_dispatch_run_fatal: Connection to XXXXXXXXXXXXXXX port 22: incorrect signature 

更多信息:我可以使用代理转发连接到此服务器通过在另一台服务器上弹跳确认客户端的priv / pub身份validation密钥是否正常。 我也看到,这台笔记本电脑和一个失败的唯一区别是openssh版本(7.1p2 =工程,7.2p2 =失败)。 也就是说,在笔记本电脑上运行dnf更新后,它开始失败…报告为Fedora bugzilla中的错误。 为FC23。

现在,这一个逃避我:我仍然可以连接从另一个FC23笔记本电脑,我可能做错了什么?

根据所报告的bug#1332082 ,这是Fedora 22发布的openssh中的一个bug。

简而言之,在使用diffie-hellman-group-exchange-sha256密钥交换时,服务器(Fedora 22中的openssh-6.9p1 )正在通过不同于客户端(Fedora 23中的openssh-7.2 )的数据进行签名。 修复已经在菩提和Fedora 22更新的路上。

感谢您的报告。