I have two machines in my home network and I want to connect them over SSH. The first machine has a local ip 192.168.1.23 and openssh remote client installed. The second has a local ip 192.168.1.169 and openssh server installed.

I start the service in the second machine,

sudo systemctl start ssh

and then I go to the client machine and fail to connect with,

ssh myusername@192.168.1.169:22
ssh: Could not resolve hostname 0.0.0.0:22: Name or service not known

After the above failure I went back to the server machine and checked out the ssh service status which says that the server is listening on 0.0.0.0:22.

1. Is that (0.0.0.0:22) ok?
2. How can I establish that connection over SSH?
3. Are ssh and sshd the same service?

6

1 Answer

SSH is a protocol for secure communication over an insecure network while sshd provides a daemon which responds to incoming SSH requests.

When you specify a port in ssh use the -p flag. So, for example:

ssh -p22 user@ipaddress 

NOT

ssh user@ipaddress:22

Your IP address would be something like 192.168.x.x not 0.0.0.0 As @steeldriver pointed out in the comments, "0.0.0.0 is just shorthand for 'all IPv4 interfaces'. It's not a real address that you should use in a ssh command".

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