SSH connection refused on azure vm

Question

I am able to render the public ip of a virtual machine on Chrome but not able to connect it with SSH, raising an error: connect to host xxx.xxx.xxx.xx port 22: Connection refused. When I check the virtual machine on Portal, there is no security group assigned to it. Is that something to do with this? How can I fix it?

Not able to use telnet on windows 10. Http port is working, but not ssh port. — Gene9y
http work on port 80, SSH work on port 22, your VM create in classic VM or Azure resource VM? — Jason Ye
Out of the box, every Linux VM you spin up in Azure has an ssh port open. If you used ARM, it'll be port 22. If you created a classic vm, it's either port 22 or a random port (if there is more than one vm in the cloudapp.net namespace. Perhaps edit your question with more details about the ports configured? — David Makogon

Jason Ye Jason Ye · Accepted Answer · 2017-04-07T05:58:43

According to your description, if we want to ssh to docker image, we should install SSH on this image, and open port for this image, I will run centos image for example:

docker pull centos:centos6
docker run -i -t centos:centos6
yum install openssh-server openssh-client(install ssh)
chkconfig sshd on
passwd(reset root password)
exit
docker commit 332b19ca916c centos/centosssh  (commit this image)

docker run -i -t -d -p 50001:22 centos/centosssh  (NAT for this container)
docker attach containerid  (connect this container)
vi /etc/ssh/sshd_config  (modify sshd config)

change UsePAM to no

service sshd start

Then open port 50001 in Azure NSG.

This time, we can use SSH to connect it:

Update:

I use CLI 2.0 to create a VM with docker extension, and change public IP address to static, and use command sudo docker run -d -p 80:80 nginx to run container on the VM. then use chrome to test the nginx, it works fine, and I can ssh to the Azure VM with Public IP and FQDN. the nginx container:

jason@MyDockerVM:~$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                         NAMES
61e10ebb6d22        nginx               "nginx -g 'daemon ..."   4 minutes ago       Up 4 minutes        0.0.0.0:80->80/tcp, 443/tcp   kind_leavitt

Try to use FQDN to ssh host:

[c:\~]$ ssh jason@mypublicdns.eastus.cloudapp.azure.com


Host 'mypublicdns.eastus.cloudapp.azure.com' resolved to 52.186.123.151.
Connecting to 52.186.123.151:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Welcome to Ubuntu 14.04.4 LTS (GNU/Linux 3.19.0-65-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

  System information as of Fri Apr  7 06:40:06 UTC 2017

  System load:  0.31              Processes:              118
  Usage of /:   5.8% of 28.80GB   Users logged in:        1
  Memory usage: 12%               IP address for eth0:    10.0.0.4
  Swap usage:   0%                IP address for docker0: 172.17.0.1

Try to use public IP address to ssh the host:

[c:\~]$ ssh jason@52.186.123.151
Connecting to 52.186.123.151:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

Welcome to Ubuntu 14.04.4 LTS (GNU/Linux 3.19.0-65-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

  System information as of Fri Apr  7 06:40:55 UTC 2017

  System load:  0.21              Processes:              119
  Usage of /:   5.8% of 28.80GB   Users logged in:        1
  Memory usage: 12%               IP address for eth0:    10.0.0.4
  Swap usage:   0%                IP address for docker0: 172.17.0.1

SSH connection refused on azure vm

1 Answers