SSH access to my ubuntu server

janvitro · 07-25-2017, 03:19 PM

Hello all of you out there,

I have installed virtualbox and I am running ubuntu 16.04-2 64 bit as a virtual machine.
I can ping the server with IP address 192.168.124.10
But now I want to log on to the server using SSH.
The openssh-server package is installed but when I try to log on I get the message: ssh: connect to host 192.168.124.10 port 22: Connection refused
My wifi network is configured to use DHCP and my wifi adapter gets an IP address of 192.168.124.x
I tried to set a static IP address but when I configure it that way I don't have access to the internet.
I have googled and configured SSH to use port 2222 but this doesn't help.
I also made a rule for ufw to accept connections on port 22

Anybody any ideas?

Thanks in advance.

suicidaleggroll · 07-25-2017, 03:52 PM

How do you have the network adapter configured in virtualbox? Bridged, NAT, etc.

Where do you want to SSH into the VM from? The host, some other machine on your network, or outside your network?

Waris · 07-25-2017, 04:06 PM

Lets take it from the top.
When you first created the VM, how was it congfigured? Was it NAT, bridged, Host only adapter? Are you able to ping anything from inside the VM? What does the ONBOOT (yes, no) say in /etc/sysconfig/network-scripts/ifcfg-enp0s3 or eth0?

dejank · 07-25-2017, 04:20 PM

Where are you logging from with ssh? From your host where that vm is installed? From LAN? From outside?

TheEzekielProject · 07-25-2017, 09:07 PM

How did you go about configuring ssh exactly? Did you use gui interfaces or the command line? I believe UBuntu 16 is systemd. if so, you can check the server is running via

Code:

systemctl status sshd

you should get something like

Code:

● ssh.service - OpenBSD Secure Shell server
   Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: disable
   Active: active (running) since Sun 2017-07-23 06:51:50 PDT; 2 days ago
 Main PID: 871 (sshd)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/ssh.service
           └─871 /usr/sbin/sshd -D
lines 1-7/7 (END)

note the bolded text.

Also check your configuration file

Code:

your-favorite-text-editor /etc/ssh/sshd_config

and make sure the "Port" reads 2222, as you said you have set it. Though if you're paranoid enough I'd recommend changing this to something else and not post the port number online, and also make sure your firewall rule allows the same port that you're changing it to. Then reload the service

Code:

systemctl restart sshd

Note that most of these commands require root privileges.

AwesomeMachine · 07-25-2017, 09:20 PM

You have to use bridged networking in the VM.

janvitro · 07-26-2017, 08:14 AM

Thank you all for your help.
The situation is as follows: I am on a wifi network of 192.168.124.x this is my only network.
I have configured the virtual machine's NIC as a bridged adapter which is attached to wl0
I have checked the Cable connected radio button.
From the virtual machine I can ping the host for example ping 192.168.124.75
From my linux Mint terminal I can ping 192.168.124.10 (this is the ip address I gave ubuntu server)
Promiscuous mode is set to allow all
From giving the command systemctl status sshd I found that the server was listening on port 0.0.0.0 strange enough.
So I edited /etc/ssh/sshd_config
There I set the ip address to 192.168.124.10
Now I can log on using SSH but the connection seems to be somewhat unstable.
Sometimes the link is broken.
But I think this is what I have to be satisfied with.

Again thank you all for your time

scasey · 07-26-2017, 01:08 PM

Quote:

Originally Posted by janvitro

From giving the command systemctl status sshd I found that the server was listening on port 0.0.0.0 strange enough.

Just FYI - that's not the port, that means the server is listening on all IP addresses. The port follows the colon.

Glad you figured out the problem, tho.

janvitro · 07-27-2017, 03:46 AM

I prefer to use VirtualBox instead of VMware because VirtulBox is open source.
I configured the whole thing and I can log on to my server but much to often I get something like:
cannot connect to port 22 connection refused (I don't know the exact output)
What I did is install VMware player again, on one virtual machine I run pfSense profiding NAT and many other features.
I then assigned an extra IP address to my wifi adapter.
I now have a virtual network isolated from th rest which I can access from my Mint terminal.
VirtualBox can a thing or two from the ease of which everything is installed and it's stabilaty.
But maybe the problem isn't VirtualBox but me . . .
But for now I'm happy with the current configuration despite of the fact that VMware isn't open source.
Thank you all for your time and effort.

Best regards,

Jan