I can't establish a ssh connection to my server

as the title said:

I try to execute the command

$ nc -w 10 22 && echo true || echo false

and I got false

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I am also having this exact issue. I am doing ssh in windows through cygwin. Also tried it through Chrome ssh extension. <br> <br>Response from cygwin <br> <br>$ ssh root@ -p 22 <br>Could not create directory ‘/home/admin/.ssh’. <br>The authenticity of host ‘ (’ can’t be established. <br>ECDSA key fingerprint is 30:b3:9b:12:d5:f2:bd:30:a7:61:7b:c5:d7:50:22:82. <br>Are you sure you want to continue connecting (yes/no)? yes <br>Failed to add the host to the list of known hosts (/home/admin/.ssh/known_hosts). <br>root@’s password: <br>Connection closed by <br> <br>Response from chrome <br>Welcome to Secure Shell version 0.8.26. <br>Answers to Frequently Asked Questions: <br>[Pro Tip] Use ‘Open as Window’ to keep Control-W from closing your terminal! <br>[Pro Tip] See for more information. <br>Connecting to root@… <br>Loading NaCl plugin… done. <br>Connection closed by UNKNOWN <br>NaCl plugin exited with status code 255. <br>®econnect, ©hoose another connection, or E(x)it? <br> <br>Please let me know the issue here. <br> <br>Thanks <br>Mrityunjaya

Your system appears up and responding to ssh connections <br>$ ping <br>PING ( 56(84) bytes of data. <br>64 bytes from icmp_req=1 ttl=57 time=76.0 ms <br>64 bytes from icmp_req=2 ttl=57 time=75.8 ms <br>64 bytes from icmp_req=3 ttl=57 time=76.1 ms <br>64 bytes from icmp_req=4 ttl=57 time=75.6 ms <br>^C <br>— ping statistics — <br>4 packets transmitted, 4 received, 0% packet loss, time 3000ms <br>rtt min/avg/max/mdev = 75.653/75.941/76.140/0.189 ms <br>$ nmap <br> <br>Starting Nmap 5.21 ( ) at 2014-03-07 18:10 EST <br>Nmap scan report for ( <br>Host is up (0.075s latency). <br>Not shown: 999 closed ports <br>PORT STATE SERVICE <br>22/tcp open ssh <br> <br>Nmap done: 1 IP address (1 host up) scanned in 1.53 seconds <br>$ ncat 22 && echo true || echo false <br>SSH-2.0-OpenSSH_5.3 <br>$ ssh <br>The authenticity of host ‘ (’ can’t be established. <br>RSA key fingerprint is cc:70:82:29:42:b6:e1:92:6a:0b:61:7b:c9:7a:7f:2a. <br>Are you sure you want to continue connecting (yes/no)?