linux - Git Permission denied (publickey,gssapi-keyex,gssapi-with-mic)?

Question

Client: OS Ubuntu, git-version 2.7.4.

Server: OS Centos , git-version 2.7.4.

I have a private ssh key in my client and public key in server.

I can use shell to enter my server(no password).

But can't push origin master !

sudo ssh -i /path/to/key/ -vT [email protected] OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, 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 xxx.xx.xxx.xxx [xxx.xx.xxx.xxx] port 22. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug1: identity file /home/whj/.ssh/whjwebsite type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/whj/.ssh/whjwebsite-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1 debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000 debug1: Authenticating to xxx.xx.xxx.xxx:22 as 'git' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: [email protected] 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: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:aC1Ydp+6x8IP+TV5jEl7WwqW6sEycbznbfL09qON/OA debug1: Host 'xxx.xx.xxx.xxx' is known and matches the ECDSA host key. debug1: Found key in /root/.ssh/known_hosts:1 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_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-debug1: Next authentication method: gssapi-keyex debug1: No valid Key exchange context debug1: Next authentication method: gssapi-with-mic debug1: Unspecified GSS failure. Minor code may provide more information No Kerberos credentials available debug1: Unspecified GSS failure. Minor code may provide more information No Kerberos credentials available debug1: Unspecified GSS failure. Minor code may provide more information debug1: Unspecified GSS failure. Minor code may provide more information No Kerberos credentials available debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/whj/.ssh/whjwebsite debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-debug1: No more authentication methods to try. Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

'whjwebsite 'is my private key.

drwx------ .ssh/

-rw------- whjwebsite

server:sshd_config:

``` RSAAuthentication yes PubkeyAuthentication yes GSSAPIAuthentication yes GSSAPICleanupCredentials no UseDNS no AddressFamily inet PermitRootLogin yes SyslogFacility AUTHPRIV PasswordAuthentication no ChallengeResponseAuthentication no

client:ssh_config

enter image description here

Answer 1

My 2 cents: on server side, disable GSSAPIAuthentication (i.e. SSO backed by Kerberos) unless you are using Active Directory authentication on Linux (with either Centrify or SSSD) inside a corporate firewall.

If you are indeed in a SSO scenario, but Single Sign-On does not work out of the box for some reason, then use client-side options to bypass Kerberos e.g.

ssh -o GSSAPIAuthentication=no -o GSSAPIKeyExchange=no