kemaltas
By:
kemaltas

Permission denied(publickey,password). via ssh connection

April 10, 2018 179 views
Server Optimization Ubuntu 16.04

Hi there, Can I not connect ssh connection my server

I searched all question and tried, but not working.

I did not solve the problem.

ssh -vvv output:

root@kemal:~# ssh -vvv root@xxx.xxx.xxx.xxx
OpenSSH7.4p1 Debian-10+deb9u3, OpenSSL 1.0.2l 25 May 2017
debug1: Reading configuration data /etc/ssh/ssh
config
debug1: /etc/ssh/sshconfig line 19: Applying options for *
debug2: resolving "xxx.xxx.xxx.xxx" port 22
debug2: ssh
connectdirect: needpriv 0
debug1: Connecting to xxx.xxx.xxx.xxx [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug1: permanently
setuid: 0/0
debug1: key
loadpublic: No such file or directory
debug1: identity file /root/.ssh/id
rsa type -1
debug1: keyloadpublic: No such file or directory
debug1: identity file /root/.ssh/idrsa-cert type -1
debug1: key
loadpublic: No such file or directory
debug1: identity file /root/.ssh/id
dsa type -1
debug1: keyloadpublic: No such file or directory
debug1: identity file /root/.ssh/iddsa-cert type -1
debug1: key
loadpublic: No such file or directory
debug1: identity file /root/.ssh/id
ecdsa type -1
debug1: keyloadpublic: No such file or directory
debug1: identity file /root/.ssh/idecdsa-cert type -1
debug1: key
loadpublic: No such file or directory
debug1: identity file /root/.ssh/id
ed25519 type -1
debug1: keyloadpublic: No such file or directory
debug1: identity file /root/.ssh/ided25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH
7.4p1 Debian-10+deb9u3
debug1: Remote protocol version 2.0, remote software version OpenSSH7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH
7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting ONONBLOCK
debug1: Authenticating to xxx.xxx.xxx.xxx:22 as 'root'
debug3: hostkeys
foreach: reading file "/root/.ssh/knownhosts"
debug3: record
hostkey: found key type ECDSA in file /root/.ssh/knownhosts:1
debug3: load
hostkeys: loaded 1 keys from xxx.xxx.xxx.xxx
debug3: orderhostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2
MSGKEXINIT sent
debug3: receive packet: type 20
debug1: SSH2
MSGKEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: 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,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first
kexfollows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first
kexfollows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2
MSGKEXECDHREPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:25DrZ1LWffMz6An8/GcJvVMA3HeR3tKE0K1Y8yW9GGk
debug3: hostkeys
foreach: reading file "/root/.ssh/knownhosts"
debug3: record
hostkey: found key type ECDSA in file /root/.ssh/knownhosts:1
debug3: load
hostkeys: loaded 1 keys from xxx.xxx.xxx.xxx
debug1: Host 'xxx.xxx.xxx.xxx' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/knownhosts:1
debug3: send packet: type 21
debug2: set
newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2MSGNEWKEYS sent
debug1: expecting SSH2MSGNEWKEYS
debug3: receive packet: type 21
debug1: SSH2MSGNEWKEYS received
debug2: setnewkeys: mode 0
debug1: rekey after 134217728 blocks
debug2: key: /root/.ssh/id
rsa ((nil))
debug2: key: /root/.ssh/iddsa ((nil))
debug2: key: /root/.ssh/id
ecdsa ((nil))
debug2: key: /root/.ssh/ided25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2
MSGEXTINFO received
debug1: kexinputextinfo: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug3: receive packet: type 6
debug2: service
accept: ssh-userauth
debug1: SSH2MSGSERVICEACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod
lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethodisenabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/idrsa
debug3: no such identity: /root/.ssh/id
rsa: No such file or directory
debug1: Trying private key: /root/.ssh/iddsa
debug3: no such identity: /root/.ssh/id
dsa: No such file or directory
debug1: Trying private key: /root/.ssh/idecdsa
debug3: no such identity: /root/.ssh/id
ecdsa: No such file or directory
debug1: Trying private key: /root/.ssh/ided25519
debug3: no such identity: /root/.ssh/id
ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethodlookup password
debug3: remaining preferred: ,password
debug3: authmethod
is_enabled password
debug1: Next authentication method: password

2 Answers
kemaltas April 11, 2018
Accepted Answer

I found the problem and reset the password and the new password is rejected with the launch console. The newly created password was accepted when entering the e-mail password through ssh from the remote machine.

Are you using an ssh-key or a password for authentication? If you are using a key, what is the name on your local machine of your private key file?

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