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I am trying to connect to my server using

ssh user@server.com -vv

I get 

debug1: read_passphrase: can't open /dev/tty: No such device or address

error or just

Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,password).

when I not use -vv option. /dev/tty file does exist. I am logged in as root, so I have access to it. tty command returs

/dev/console

I am remotely connected (using Putty) to server, that I am trying to connects to other server from. It is not a cron job. How can I solve the problem?

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Does the /dev/tty device exist on both servers: – derchris Mar 25 '11 at 16:20
@derchris: Yes, it does exist. I can easily connect to server.com machine from other places. – LukLed Mar 25 '11 at 16:53
What would be a main difference between a server you can, and the server you can't connect? Just trying to rule out any OS/version issues. – derchris Mar 25 '11 at 17:12
@derchris: I believe this is related to problem with /dev/tty on machine, that I am trying to ssh from, but I don't know how to solve it. – LukLed Mar 25 '11 at 17:16
I understand the problem. What I was asking was you said you can connect from somewhere else. So what is the difference between these 2 systems you try to connect from. – derchris Mar 25 '11 at 17:20
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1 Answer

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What does ls -la /dev/tty show? Is it both world-readable and world-writeable?

$ ls -la /dev/tty

crw-rw-rw- 1 root tty 5, 0 Aug 23 20:58 /dev/tty

$

That is what you should see. If not, that's your problem.

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