Originally Posted by shemeza
i run the command "nmap -PN22 172.18.19.183" and the output was
Nmap scan report for 172.18.19.183
Host is up.
All 1000 scanned ports on 172.18.19.183 are filtered
Nmap done: 1 IP address (1 host up) scanned in 201.35 seconds
but still i'm not able to ping the 172.18.19.183
Im not sure what the confusion is shemeza? The output of nmap flat out told you that port 22 is blocked. You either have to configure the firewall, or get whom ever is in charge of that system to grant you permission to ssh in. You will ALWAYS continue to have the same error msg. until you resolve this issue.
It can be caused by one of two things, mainly that is:
1. firewall issues (either hardware or software to include but not limited to iptables)
2. ssh is not running on that server therefore port 22 is not open.