ssh: connect to host pi adress port 22: Connection refused

Question

i'm having some trouble when trying to connect to my raspberry b+. i have used buildroot and add dropBear package for SSH . I gave the pi a static adress 10.42.0.5 and it's detected correctly in my ethernet network here are some commands :

nmap -sP 10.42.0.0/24
Starting Nmap 6.40 ( http://nmap.org ) at 2016-01-25 02:23 WET
Nmap scan report for 10.42.0.1
Host is up (0.00017s latency).
Nmap scan report for 10.42.0.5
Host is up (0.0069s latency).
Nmap done: 256 IP addresses (2 hosts up) scanned in 2.61 seconds

The pi adress is 10.42.0.5

For the ping it runs successfully

ping -c 3 10.42.0.5
PING 10.42.0.5 (10.42.0.5) 56(84) bytes of data.
64 bytes from 10.42.0.5: icmp_seq=1 ttl=64 time=4.83 ms
64 bytes from 10.42.0.5: icmp_seq=2 ttl=64 time=3.03 ms
64 bytes from 10.42.0.5: icmp_seq=3 ttl=64 time=2.03 ms

--- 10.42.0.5 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 2.035/3.303/4.836/1.158 ms

But whe trying ssh i get connection refused

ssh [email protected]
ssh: connect to host 10.42.0.5 port 22: Connection refused

Note : i think this is not a duplicate since i have used BUILDROOT not raspbian or some other official distributions for raspberry

thanks

Answer 1

Check netstat output on the RPI to check whether SSH server is open and listening. You can run following command and see whether dropbear is activily listening for connection

netstat -ta | grep ssh | grep -v grep

You might have enabled iptables(firewall) check whether you are not blocking the SSH port traffic (default port 22). List iptables rules to validate that

iptables -L