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Accepted
Alexander Gladysh
Asked: 2011-07-16 03:16:40 +0800 CST

SSH closes connection when key is accepted

  • 772

In server's auth.log:

Failed publickey for agladysh from MYIP port 61313 ssh2

In ssh -vvv:

debug1: Offering public key: /Users/agladysh/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-rsa blen 277
debug2: input_userauth_pk_ok: fp FINGERPRINT
debug3: sign_and_send_pubkey
Connection closed by SERVER

I triple-checked the authorized_keys.

I also checked:

  • hosts.deny file for my IP
  • AllowUsers in SSH config
  • my default shell on server

Any hints how to debug this?

Server: Ubuntu Server 11.04, client: Ubuntu 10.10 (key is forwarded from OS X, works on other servers).

linux ssh troubleshooting

3 Answers

  1. Best Answer

    The actual problem was that my user was somehow missing from `/etc/shadow.

    I will let this question to stay open for sometime so that people can put more troubleshooting advice here.

    • 5

  2. Also, make sure the permissions on ~/.ssh are 700 and ~/.ssh/authorized_keys is 600. The server won't let you use the key if the permissions are incorrect.

    • 2

  3. In /etc/shadow you can lock users with * or !, like described here. A locked user will lead to a similar error message with Server accepts key... followed by Connection closed...

    • 0