Why can I ping a server but not connect via SSH

Question

When I ping my server  it responds   user localhost    ping my server PING my server  111 111 111 11  56 84  bytes of data  64 bytes from my server  111 111 111 11   icmp req 1 ttl 42 time 38 4 ms 64 bytes from my server  111 111 111 11   icmp req 2 ttl 42 time 50 0 ms 64 bytes from my server  111 111 111 11   icmp req 3 ttl 42 time 58 6 ms  C --- my server ping statistics --- 3 packets transmitted  3 received  0  packet loss  time 2003ms rtt min avg max mdev   38 419 49 037 58 637 8 287 ms   but when I try to ssh  something that I always do  and have been doing for the past few hours on the same connection   it hangs   user localhost    ssh my server   http   speedtest net says that my connection has 1 5 Mbps download and 0 4 Mbps upload speed   Is there a reason that ssh hangs     Results from suggestions provided in answers  from  nsfyn55  user localhost    telnetmy server 22  Trying 111 111 111 11    Connected to my server Escape character is       SSH-2 0-OpenSSH 4 3 Connection closed by foreign host    from  vahid   user localhost    nc -v -w 1 111 111 111 111 -z 22 nc  timeout cannot be negative

User · Answer

Find out two pieces of information

Whats the hostname or IP of the target ssh server
What port is the ssh daemon listening on (default is port 22)

$> telnet <hostname or ip> <port>

Assuming the daemon is up and running and listening on that port it should etablish a telnet session. Likely causes:

The ssh daemon is not running
The host is blocking the target port with its software firewall
Some intermediate network device is blocking or filtering the target port
The ssh daemon is listening on a non standard port
A TCP wrapper is configured and is filtering out your source host

User · Answer

On the server  try   netstat -an    and look to see if tcp port 22 is opened  use findstr in Windows or grep in Unix

User · Answer

ping  ICMP protocol  and ssh are two different protocols    It could be that ssh service is not running or not installed firewall restriction  local to server like iptables or even sshd config lock down   or  external firewall that protects incomming traffic to network hosting 111 111 111 111    First check is to see if ssh port is up   nc -v -w 1 111 111 111 111 -z 22   if it succeeds then ssh should communicate if not then it will never work until restriction is lifted or ssh is started

[ssh] Why can I ping a server but not connect via SSH?

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