Eu tenho um servidor que só permite ssh com uma chave. No entanto, quando eu tento ssh para esta máquina, recebo o erro "Permission denied (publickey)". Do auth.log no meu servidor isso está acontecendo pre auth. As permissões nas minhas chaves e na pasta .ssh parecem bem. Além disso, se eu usar -vv ao tentar ssh, ele não parece estar tentando usar o arquivo de chave correto.
A única maneira de funcionar é usar o -i arg e especificar o caminho para a chave. (Que está na minha pasta .ssh) Eu instalei a chave antes e não tive problemas. A única diferença foi que desta vez eu tive que scp o arquivo de chaves para o servidor e então usar cat > > para adicioná-lo ao arquivo de chaves autorizado, em vez de usar ssh-copy-id.
Alguém sabe como eu poderia depurar isso mais ou corrigir o problema em vez de deixar o servidor inseguro por algum tempo e depois usar o ssh-copy-id?
-vv output (a chave que é válida nem sequer é tentada por algum motivo.)
OpenSSH_6.7p1 Raspbian-5+deb8u2, OpenSSL 1.0.1k 8 Jan 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to $host [$ip address] port $port.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/ben/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.7p1 Raspbian-5+deb8u2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Debian-5+deb8u2
debug1: match: OpenSSH_6.7p1 Debian-5+deb8u2 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: setup [email protected]
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: setup [email protected]
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 10:b9:0c:fa:8f:69:f2:eb:84:bd:69:32:50:1b:dd:ee
debug1: Host '$host' is known and matches the ECDSA host key.
debug1: Found key in /home/ben/.ssh/known_hosts:1
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/ben/.ssh/id_rsa ((nil)),
debug2: key: /home/ben/.ssh/id_dsa ((nil)),
debug2: key: /home/ben/.ssh/id_ecdsa ((nil)),
debug2: key: /home/ben/.ssh/id_ed25519 ((nil)),
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/ben/.ssh/id_rsa
debug1: Trying private key: /home/ben/.ssh/id_dsa
debug1: Trying private key: /home/ben/.ssh/id_ecdsa
debug1: Trying private key: /home/ben/.ssh/id_ed25519
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
Detalhes do diretório .ssh e do conteúdo,
ls - ld
drwxr-xr-x 2 $user $user .
ls -l
total 16
-rw------- 1 $user $user 733 May 3 16:27 authorized_keys
-rw------- 1 $user $user 3243 May 9 15:33 key
-rw-r--r-- 1 $user $user 751 May 9 15:33 key.pub
-rw-r--r-- 1 $user $user 444 May 9 15:31 known_hosts