Hi, I have problem with ssh2_Auth_Pubkey_File. I have one server for connecting to others. On all of theese is FreeBSD installed, but different versions. I am using dsa keys for connecting. From command line works everything fine (with using the same key files). But from php I have problem - a few servers with new version of FreeBSD dont accept connection. On machine where is php installed I have this message in php errorlog: [Tue Jun 12 12:15:37 2012] [error] [client ::1] PHP Warning: ssh2_auth_pubkey_file(): Authentication failed for useruser using public key: Username/PublicKey combination invalid in /usr/local/www/pokus.php on line 119 and in auth.log on remote machine I have: Jun 12 12:15:37 remote10 sshd[14012]: Did not receive identification string from 92.62.224.xx I thing, that problem is not in script - I am able to connect to some machines. But where could be a problem, I dont know. Here are methods, which I have to tried: #private $_METHODS = Array('hostkey' => 'ssh-dss'); private $_METHODS = Array('kex' => 'diffie-hellman-group1-sha1','hostkey' => 'ssh-dss','client_to_server' => Array('crypt' => '3des-cbc','mac' => 'hmac-md5','comp' => 'none'),'server_to_client' => Array('crypt' => '3des-cbc','mac' => 'hmac-md5','comp' => 'none')); .... private function Set_Connection() { $this->_connection = ssh2_Connect($this->_device_hostname, $this->_device_port, $this->_METHODS); if(!$this->_connection) { $this->_connection = NULL; return false; } if(!ssh2_Auth_Pubkey_File($this->_connection, $this->_USER, $this->_PUBLIC_KEY_PATH, $this->_PRIVATE_KEY_PATH)) { $this->_connection = NULL; return false; } return true; } Thank you for any suggestion. Radek