I can ping a server, but I can not ssh to it

I can ping my server:

» ping -c 1 42.24.53.224
PING 42.24.53.224 (42.24.53.224) 56(84) bytes of data.
64 bytes from 42.24.53.224: icmp_seq=1 ttl=62 time=1.10 ms
--- 42.24.53.224 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 1.103/1.103/1.103/0.000 ms

I can trace the route:

» traceroute 42.24.53.224
traceroute to 42.24.53.224 (42.24.53.224), 30 hops max, 60 byte packets 1 42.243.198.253 (42.243.198.253) 0.702 ms 0.751 ms 0.856 ms 2 42.16.36.44 (42.16.36.44) 0.757 ms 1.123 ms 1.500 ms 3 42.24.53.224 (42.24.53.224) 8.775 ms 8.725 ms 8.725 ms

I run a ssh in my server in a different port (to exclude firewall issues):

sudo /usr/sbin/sshd -ddd -p 33333

And I try to connect to it, but this hangs forever:

» ssh -p 33333 42.24.53.224

What other debugging could I perform?

EDIT

» nmap 42.24.53.224 -p 33333
Starting Nmap 7.01 ( ) at 2018-03-23 10:36 CET
Nmap scan report for 42.24.53.224
Host is up (0.0026s latency).
PORT STATE SERVICE
33333/tcp filtered unknown
Nmap done: 1 IP address (1 host up) scanned in 5.76 seconds

6

1 Answer

The fact you can ping means that the ICMP protocol is open and you can send and receive ICMP requests.

But the nmap command on port 33333 reports that this port is filtered, which means that there's something in the middle of the connection blocking it (most probably a firewall, either your provider's or your local machine's)

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