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I'm having issues setting up a different CentOS account with its own pair of SSH keys. I have created the required files but when connecting with Putty it says Connection refused, here's the putty log:

2013-03-31 23:09:14 Looking up host "XXX.XXXXXX.XXXXX"
2013-03-31 23:09:14 Connecting to XX.XX.XXX.XXX port 22
2013-03-31 23:09:14 Server version: SSH-2.0-OpenSSH_5.3
2013-03-31 23:09:14 Using SSH protocol version 2
2013-03-31 23:09:14 We claim version: SSH-2.0-PuTTY_Release_0.62
2013-03-31 23:09:14 Doing Diffie-Hellman group exchange
2013-03-31 23:09:15 Doing Diffie-Hellman key exchange with hash SHA-256
2013-03-31 23:09:15 Host key fingerprint is:
2013-03-31 23:09:15 ssh-rsa XXXX XX:6s:18:67:a3:39:39:95rn:21:p1:9b:12:4b:1p:24
2013-03-31 23:09:15 Initialised AES-256 SDCTR client->server encryption
2013-03-31 23:09:15 Initialised HMAC-SHA1 client->server MAC algorithm
2013-03-31 23:09:15 Initialised AES-256 SDCTR server->client encryption
2013-03-31 23:09:15 Initialised HMAC-SHA1 server->client MAC algorithm
2013-03-31 23:09:15 Reading private key file "C:\Users\XXXXX\Desktop\SSH-Key.ppk"
2013-03-31 23:09:15 Offered public key
2013-03-31 23:09:15 Server refused our key
2013-03-31 23:09:15 Using SSPI from SECUR32.DLL
2013-03-31 23:09:15 Attempting GSSAPI authentication
2013-03-31 23:09:16 GSSAPI authentication request refused
2013-03-31 23:09:16 Disconnected: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)
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1 Answer

Take a look at this superuser.com question along with it's answers:

Sounds like an issue with your particular version of PuTTY. Make sure you're using 0.62 or higher.

This appears to be a bug with version 0.61 of PuTTY.

summary: Spurious "Access denied" printed in the PuTTY window after GSSAPI failure

class: bug: This is clearly an actual problem we want fixed.

difficulty: fun: Just needs tuits, and not many of them.

priority: high: This should be fixed in the next release.

absent-in: 0.60 present-in: 0.61 fixed-in: r9232 0.62

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When you reference an answer on another site, you should summarize the answer in your answer. –  jordanm Apr 1 '13 at 5:10
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Didn't seem necessary given the other site was a stackexchange site but I added some additional details anyway. –  slm Apr 1 '13 at 5:24
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