I followed, https://wiki.archlinux.org/index.php/GitLab#Configuration, and finally brought gitlab it up. But, I could not use ssh to clone the project.
$ ssh -T gitlab#192.168.48.3
Failed to get username: who='' is invalid
What is this message who='' and how to debug???
Using ssh -Tv, I got
$ ssh -T gitlab#192.168.48.3
Failed to get username: who='' is invalid
[alexlai#N2eMMc128G ~]$ ssh -Tv gitlab#192.168.48.3
OpenSSH_8.1p1, OpenSSL 1.1.1d 10 Sep 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to 192.168.48.3 [192.168.48.3] port 22.
debug1: Connection established.
debug1: identity file /home/alexlai/.ssh/id_rsa type 0
debug1: identity file /home/alexlai/.ssh/id_rsa-cert type -1
debug1: identity file /home/alexlai/.ssh/id_dsa type -1
debug1: identity file /home/alexlai/.ssh/id_dsa-cert type -1
debug1: identity file /home/alexlai/.ssh/id_ecdsa type -1
debug1: identity file /home/alexlai/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/alexlai/.ssh/id_ed25519 type -1
debug1: identity file /home/alexlai/.ssh/id_ed25519-cert type -1
debug1: identity file /home/alexlai/.ssh/id_xmss type -1
debug1: identity file /home/alexlai/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.1
debug1: match: OpenSSH_8.1 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.48.3:22 as 'gitlab'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
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
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:TbXi96Gynm1xqcTglDvS4ajP7hPHMHf2hnOiJ3w5e74
debug1: Host '192.168.48.3' is known and matches the ECDSA host key.
debug1: Found key in /home/alexlai/.ssh/known_hosts:5
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /home/alexlai/.ssh/id_rsa RSA SHA256:tdOYKwO8CDOzJeJo/6WYbtStpsMg8kuSGLCie5JOY1g
debug1: Will attempt key: /home/alexlai/.ssh/id_dsa
debug1: Will attempt key: /home/alexlai/.ssh/id_ecdsa
debug1: Will attempt key: /home/alexlai/.ssh/id_ed25519
debug1: Will attempt key: /home/alexlai/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/alexlai/.ssh/id_rsa RSA SHA256:tdOYKwO8CDOzJeJo/6WYbtStpsMg8kuSGLCie5JOY1g
debug1: Server accepts key: /home/alexlai/.ssh/id_rsa RSA SHA256:tdOYKwO8CDOzJeJo/6WYbtStpsMg8kuSGLCie5JOY1g
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.48.3 ([192.168.48.3]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions#openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00#openssh.com want_reply 0
debug1: Remote: /var/lib/gitlab/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Remote: /var/lib/gitlab/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
Failed to get username: who='' is invalid
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype eow#openssh.com reply 0
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 3468, received 3288 bytes, in 0.1 seconds
Bytes per second: sent 39481.4, received 37432.2
debug1: Exit status 1
Related
SSH used to work nicely with Git Bash before. Don't know what happened recently.
SSH version on CMD:
C:\Users\ my-user>ssh -V
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
Debug/errors On CMD:
C:\Users\ my-user>ssh -V
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
C:\Users\ my-user>ssh -v my-user1#server-url
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
debug1: Connecting to server-url [public-ip] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\ my-user/.ssh/id_rsa type 0
debug1: identity file C:\\Users\\ my-user/.ssh/id_rsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_dsa type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_dsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ecdsa type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ed25519 type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ed25519-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_xmss type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to server-url:22 as 'my-user1'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-ed25519 SHA256:Mw4Mlvqk2MgCynA+8nTUrxDy8wxXONlTAVk2K/FgbcQ
debug1: Host 'server-url' is known and matches the ED25519 host key.
debug1: Found key in C:\\Users\\ my-user/.ssh/known_hosts:167
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 4294967296 blocks
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_dsa
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_ecdsa
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_ed25519
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
Authorized uses only. All activity may be monitored and reported.
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: publickey
debug1: Offering public key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Server accepts key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Authentication succeeded (publickey).
Authenticated to server-url ([public-ip]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions#openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: ENABLE_VIRTUAL_TERMINAL_INPUT is supported. Reading the VTSequence from console
debug1: ENABLE_VIRTUAL_TERMINAL_PROCESSING is supported. Console supports the ansi parsing
debug1: client_input_global_request: rtype hostkeys-00#openssh.com want_reply 0
Last login: Tue Jun 28 09:20:50 2022 from org-ip
Same SSH version on Git Bash:
my-user#my-server MINGW64 /
$ ssh -V
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
Debug/errors On Git Bash:
my-user#my-server MINGW64 /
$ ssh -v my-user1#server-url
OpenSSH_for_Windows_8.1p1, LibreSSL 3.0.2
Pseudo-terminal will not be allocated because stdin is not a terminal.
debug1: Connecting to server-url [public-ip] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\ my-user/.ssh/id_rsa type 0
debug1: identity file C:\\Users\\ my-user/.ssh/id_rsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_dsa type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_dsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ecdsa type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ed25519 type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_ed25519-cert type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_xmss type -1
debug1: identity file C:\\Users\\ my-user/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to server-url:22 as 'my-user1'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-ed25519 SHA256:Mw4Mlvqk2MgCynA+8nTUrxDy8wxXONlTAVk2K/FgbcQ
debug1: Host 'server-url' is known and matches the ED25519 host key.
debug1: Found key in C:\\Users\\ my-user/.ssh/known_hosts:167
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 4294967296 blocks
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_dsa
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_ecdsa
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_ed25519
debug1: Will attempt key: C:\\Users\\ my-user/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
Authorized uses only. All activity may be monitored and reported.
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug1: Next authentication method: publickey
debug1: Offering public key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Server accepts key: C:\\Users\\ my-user/.ssh/id_rsa RSA SHA256:OyvnNnesOb+dn3j9NWl9dkDu/Fi52CKlN9Vq8h9LzoA
debug1: Authentication succeeded (publickey).
Authenticated to server-url ([public-ip]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions#openssh.com
<gets stuck here>
Any help/leads is welcome
Note: Git Bash uses mintty terminal
found a workaround solution: SSH works if I select "Windows cmd" as terminal instead of "mintty" which is the default while installation
I am trying to connect to bitbucket server via ssh. And i get Host key verification failed.
I sued this guide https://support.atlassian.com/bitbucket-cloud/docs/set-up-an-ssh-key/ and added my public key to the server and every thing seems to be setup correctley.
I ran ssh -v git#bitbucket.corp.jyskebank.net and get this. Is there a way to fix it?
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 *
debug1: Connecting to bitbucket.corp.jyskebank.net [10.16.207.13] port 22.
debug1: Connection established.
debug1: identity file /home/JB4555/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/JB4555/.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 OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to bitbucket.corp.jyskebank.net:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
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
debug1: kex: curve25519-sha256 need=64 dh_need=64
debug1: kex: curve25519-sha256 need=64 dh_need=64
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:/pe/xQGds7FWBp5Oj1710EfF8g9EL+Uo+kVfqy3IEQA
debug1: Host 'bitbucket.corp.jyskebank.net' is known and matches the ECDSA host key.
debug1: Found key in /home/JB4555/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/JB4555/.ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Offering RSA public key: /home/JB4555/.ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/JB4555/.ssh/id_dsa
debug1: Trying private key: /home/JB4555/.ssh/id_ecdsa
debug1: Trying private key: /home/JB4555/.ssh/id_ed25519
debug1: Next authentication method: password
Turned out there was no error. But the problem was that vscode cannot connect via ssh, when the key contains a passprahase
I have 2 virtual machines on my computer created with Vagrant.
on VM1 I create SSH key with ssh-keygen. Then copied id_rsa.pub into authorized_keys on VM2.
When I try to connect to VM2 using ssh 172.28.128.18, the connection is failed with following error
The authenticity of host '172.28.128.18 (172.28.128.18)' can't be established.
ECDSA key fingerprint is SHA256:YJ0CDFr9UcEBZkY1ajZRFg3Zx9uksZcv/i3fpC8gqdY.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '172.28.128.18' (ECDSA) to the list of known hosts.
vagrant#172.28.128.18: Permission denied (publickey).
With ssh -v vagrant#172.28.128.18 I have an other error:
OpenSSH_8.2p1 Ubuntu-4ubuntu0.3, OpenSSL 1.1.1f 31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: Connecting to 172.28.128.18 [172.28.128.18] port 22.
debug1: Connection established.
debug1: identity file /home/vagrant/.ssh/id_rsa type 0
debug1: identity file /home/vagrant/.ssh/id_rsa-cert type -1
debug1: identity file /home/vagrant/.ssh/id_dsa type -1
debug1: identity file /home/vagrant/.ssh/id_dsa-cert type -1
debug1: identity file /home/vagrant/.ssh/id_ecdsa type -1
debug1: identity file /home/vagrant/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/vagrant/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/vagrant/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/vagrant/.ssh/id_ed25519 type -1
debug1: identity file /home/vagrant/.ssh/id_ed25519-cert type -1
debug1: identity file /home/vagrant/.ssh/id_ed25519_sk type -1
debug1: identity file /home/vagrant/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/vagrant/.ssh/id_xmss type -1
debug1: identity file /home/vagrant/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.3 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 172.28.128.18:22 as 'vagrant'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
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
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:YJ0CDFr9UcEBZkY1ajZRFg3Zx9uksZcv/i3fpC8gqdY
debug1: Host '172.28.128.18' is known and matches the ECDSA host key.
debug1: Found key in /home/vagrant/.ssh/known_hosts:1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /home/vagrant/.ssh/id_rsa RSA SHA256:1cq8iCIBMZrwP6BVucSZx4Luk3LfTAf/XOfovgHiW/Y
debug1: Will attempt key: /home/vagrant/.ssh/id_dsa
debug1: Will attempt key: /home/vagrant/.ssh/id_ecdsa
debug1: Will attempt key: /home/vagrant/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/vagrant/.ssh/id_ed25519
debug1: Will attempt key: /home/vagrant/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/vagrant/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519#openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256
#openssh.com>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/vagrant/.ssh/id_rsa RSA SHA256:1cq8iCIBMZrwP6BVucSZx4Luk3LfTAf/XOfovgHiW/Y
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/vagrant/.ssh/id_dsa
debug1: Trying private key: /home/vagrant/.ssh/id_ecdsa
debug1: Trying private key: /home/vagrant/.ssh/id_ecdsa_sk
debug1: Trying private key: /home/vagrant/.ssh/id_ed25519
debug1: Trying private key: /home/vagrant/.ssh/id_ed25519_sk
debug1: Trying private key: /home/vagrant/.ssh/id_xmss
debug1: No more authentication methods to try.
vagrant#172.28.128.18: Permission denied (publickey).
What is the reason of failing connecting to VM2?
on VM2
sudo tail -f /var/log/auth.log
server sshd[2509]: Connection closed by authenticating user vagrant 172.28.128.12 port 56446 [preauth]
Same problem is, when I try to connect from VM2 to VM1.
I am trying to connect to GitLab over SSH with ED25519 and followed this source: https://docs.gitlab.com/ee/ssh/ . When I test the connection and expect the welcome message, instead it does not work and still prompts for a password. I tried my user password, but it doesn't work and I am not sure which password is required at this point. Here's the output.
ssh -Tv git#gitlab.tubit.tu-berlin.de
OpenSSH_8.2p1 Ubuntu-4ubuntu0.1, OpenSSL 1.1.1f 31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: Connecting to gitlab.tubit.tu-berlin.de [130.149.7.193] port 22.
debug1: Connection established.
debug1: identity file /home/christian/.ssh/id_rsa type -1
debug1: identity file /home/christian/.ssh/id_rsa-cert type -1
debug1: identity file /home/christian/.ssh/id_dsa type -1
debug1: identity file /home/christian/.ssh/id_dsa-cert type -1
debug1: identity file /home/christian/.ssh/id_ecdsa type -1
debug1: identity file /home/christian/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/christian/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/christian/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/christian/.ssh/id_ed25519 type 3
debug1: identity file /home/christian/.ssh/id_ed25519-cert type -1
debug1: identity file /home/christian/.ssh/id_ed25519_sk type -1
debug1: identity file /home/christian/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/christian/.ssh/id_xmss type -1
debug1: identity file /home/christian/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH_5* compat 0x0c000002
debug1: Authenticating to gitlab.tubit.tu-berlin.de:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: umac-64#openssh.com compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: umac-64#openssh.com compression: none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<3072<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:aA86J3auCo20sHneGIvwxk/uay4ynBNkWIgiio/qUUw
debug1: Host 'gitlab.tubit.tu-berlin.de' is known and matches the RSA host key.
debug1: Found key in /home/christian/.ssh/known_hosts:3
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 4294967296 blocks
debug1: Will attempt key: /home/christian/.ssh/id_ed25519 ED25519 SHA256:rFB2QOkPTiiqlMAN1V9RS9QVV2vrgxgRAa9wXm0RdJI agent
debug1: Will attempt key: /home/christian/.ssh/id_rsa
debug1: Will attempt key: /home/christian/.ssh/id_dsa
debug1: Will attempt key: /home/christian/.ssh/id_ecdsa
debug1: Will attempt key: /home/christian/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/christian/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/christian/.ssh/id_xmss
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering public key: /home/christian/.ssh/id_ed25519 ED25519 SHA256:rFB2QOkPTiiqlMAN1V9RS9QVV2vrgxgRAa9wXm0RdJI agent
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Trying private key: /home/christian/.ssh/id_rsa
debug1: Trying private key: /home/christian/.ssh/id_dsa
debug1: Trying private key: /home/christian/.ssh/id_ecdsa
debug1: Trying private key: /home/christian/.ssh/id_ecdsa_sk
debug1: Trying private key: /home/christian/.ssh/id_ed25519_sk
debug1: Trying private key: /home/christian/.ssh/id_xmss
debug1: Next authentication method: keyboard-interactive
Password:
debug1: Authentications that can continue: publickey,keyboard-interactive
Password:
debug1: Authentications that can continue: publickey,keyboard-interactive
Password:
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: No more authentication methods to try.
git#gitlab.tubit.tu-berlin.de: Permission denied (publickey,keyboard-interactive).
From the guide you mention, you need to double-check:
you have an OpenSSH 6.5 or newer
you have copied the public key to your GitLab User account Settings/SSH Keys
I would test it first with a private SSH key without any passsphrase.
The last time I ssh into my compute engine instance, it suggested a system reboot. I rebooted it. After the reboot, I can no longer ssh into it. The instance is still running, the web server is still working. I can even get authentication succeeded. It than it close the connection. The log is a below.
ssh -v -i "privatekey" username#hostname
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to hostname [ip] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file [key location] type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/keyfile-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to hostname:22 as 'username'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
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
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: Server host key
debug1: Host 'hostname' is known and matches the ECDSA host key.
debug1: Found key in /home/username/.ssh/known_hosts:2
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: privatekeyfile
Enter passphrase for key 'privatekeyfile':
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([ip]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions#openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: channel 0: free: client-session, nchannels 1
**Connection to hostname closed by remote host.**
**Connection to hostname closed.**
Transferred: sent 2256, received 1380 bytes, in 0.0 seconds
Bytes per second: sent 155684.5, received 95232.6
debug1: Exit status -1
Based on the debug output you have provided, I have found two resolved issues with similar output. Here are the two links found 1st link and 2nd link. They were essentially resolved by changing the ~/.ssh permissions.