SSH, otherwise known as "Secure Shell", is a method for securely connecting to a remote computer.

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How to only allow web server access through SSH?

My goal is to have a web server on my PC (running Ubuntu 16.04) that only I can access through SSH. SSH has been nicely set up (as described in one of my previous questions) now how do I make it so ...
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20 views

how to enable every(all) ports in debian server

I am new to Linux. I opened a ssh connection for enabling SMTP port 587. I have inserted a command sudo iptables -A INPUT -p tcp --dport 587 ACCEPT And I have saved this iptables file. Made this ...
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ubuntu 14.04 using ssh tunneling to connect to remote server

After searching through internet, I could not find article explaining how to use SSH command shell with tunneling. What I need is exactly the same shell, like we have when using ssh command: ssh ...
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9 views

disable cellular data by using commands,

Anybody, please help us to find out the ssh commands so we can disable cellular data for our m2m data, we do not want to do it from web ui so looking for command line?
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12 views

FireFox, ssh tunnelling not working

I have Ubuntu 14.04 installed on a virtualbox vm. Set up ProxyCommand and it seems to work fine in order to connect my jumpbox before connecting to server1. So from localhost I connect to Jumpbox the ...
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14 views

Knockd not recognizing knocked ports Ubuntu Server

I've got a server with knockd running. When ports 7000, 8000, and 9000 are hit, knockd is supposed to insert a rule into my iptables firewall and allow the connection to reach a port (22). For some ...
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3answers
46 views

Cannot connect remotely using ssh

I have recently installed an ubuntu 16.04. I have installed ssh server and the sshd service is up and running. I have some other PCs in the same network (windows, mac, ubuntu 14.06) and I can ping ...
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8 views

How to set up X11 forwarding in byobu inside a LXC container

I currently SSH into a LXC container running in a Ubuntu host machine. I have managed to set up X11 forwarding from the container to my local machine but when I start byobu (inside the container) the ...
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1answer
25 views

How to connect via ssh and use gcc on target?

I would like to do two things automatically within a bash script: Connect via ssh to my target. Execute gcc. My script looks like this: ( echo "cd myfolder" echo "gcc -o mybin ...
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1answer
30 views

SSH connection timed out externally, but works internally

Recently I tried to set my Ubuntu 14.04 desktop computer (I will call it "computer A") as a ssh server so I could access it remotely from my laptop (I will call it "computer B"). I installed ...
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17 views

Cant SSH to remote server trought VPN

Currently am running Ubuntu 16.04 with installed and configured CiscoAnyConnect VPN. When I connect to VPN, I can't ssh to remote servers. SSH is just standing and nothing is happening. I can ping ...
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Apache2.4 PHP 5.6 Ubuntu 15.10 No Input File Specified

I am running a VPS with Ubuntu 15.10 using Apache 2.4 as my web server and I am kind of new to servers and stuff but I am currently creating an API. I first did this on my localhost. This worked ...
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8 views

Can I use a UDP connection for the “Connect to server” option in file manager?

I work a lot on remote mashines and like to bookmark them in my file explorer using sftp://user@host/initial/dir syntax. In unstable networks, this connection keeps breaking off an I have to ...
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2answers
33 views

How to expose ssh to the internet?

I run the search on google and ALL I can find is a bunch of nonsense about how dangerous it is to do this with only a password...followed with a link to the instructions on the ubuntu website for ...
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0answers
18 views

Check status progress on running rsync

I have started a rsync task via terminal on my local ubuntu machine to copy files from one local HDD to another local HDD with the command rsync -a --progress source destination. Hence I am able to ...
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1answer
45 views

Cannot SSH into server from one particular computer (connection closed/did not receive auth string)

I'm having trouble using ssh to access a server that I recently set up with 16.04, but only from a specific computer (my laptop). When I run ssh -vvv -p sshPort user@host, I get this output: ...
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9 views

Autossh fork after entering password

I have an SSH tunnel that I run with autossh to keep it going reliably. The only issue I have is that I have an encrypted private key which I use to connect. If I want to fork my process to the ...
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6answers
3k views

Personal computer hacked: How do I block this user from logging in again? How do I find out how they are logging in?

I am 99.9% sure that my system on my personal computer has been infiltrated. Allow me to first give my reasoning so the situation will be clear: Rough timeline of suspicious activity and subsequent ...
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1answer
37 views

Send ZFS snapshot to remote machine

Edit: This question originally focused on the issue of reversing the direction of the ssh connection on the transfer, but I came to realize that wasn't what was causing the problems I run into, so I ...
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80 views

sshd in Ubuntu 16.04 - login takes very long

I've seen ssh logins take some seconds many times before in the past. I always found that inappropriate. After I reinstalled my workstations with Xubuntu 16.04, this effect became really disruptive. ...
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15 views

MPI-programm tries to access via ssh(?)

I got an MPI code which I can't get running. All needed libraries are installed and compiling works with no problem. But when I start the code mpirun -n 2 ./a.out the terminal freezes after some ...
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1answer
64 views
+100

How to ensure user separation on an old school shell server

I want to run an old school shell server for a couple of people, ie. one where users get ssh access so they can run software (their own or provided). My concern is appropriate separation between ...
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7 views

Use vpnc For Specific URL And Port

I'm on Ubuntu 14.04 and I use vpnc client to connect to a client's network. However due to this all of my traffic (web browser, streaming, skype, etc) gets routed through the VPN even though I only ...
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34 views

HDMI screen gives “no signal” but VNC screen shows window manager correctly

My Ubuntu 12.04 kernel is running perfectly fine and even the desktop shows in all its glory when I connect via a VNC client from my Mac. It even recognizes my HDMI monitor that is physically plugged ...
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1answer
20 views

can't ssh into remote machine using blowfish

I have a remote machine I need to ssh to using blowfish encryption. I set everything up on my laptop on my previous distro and I have in my config file setup for blowfish. Today I install Ubuntu Gnome ...
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3answers
725 views

Ubuntu 16.04 ssh: sign_and_send_pubkey: signing failed: agent refused operation

I just upgraded my Ubuntu System from 15.10 to 16.04 by completely wiping the Ubuntu 15 partition from my system. After installing Ubuntu 16.04 I recreated my ssh keys as I forgot to back them up, ...
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1answer
27 views

Not able to ssh as root on 14.04.2

I have done all the workarounds, yet, I am still not able to ssh as root. I have already modified PermitRootLogin to yes, and I have reset ssh services. I have even rebooted the VM, but it is just not ...
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15 views

How to export the gui of an already running program to the remote computer via SSH? [duplicate]

I have pycharm on my desktop and I would like to access it from my laptop over ssh without having to close pycharm on the desktop (since I frequently have long tasks running). Currently, I am able ...
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330 views

vagrant box for ubuntu/xenial64 and putty on Windows 10 host

I am using vagrant to run some virtual machines on my personal laptop (Windows 10). I have already installed ubuntu 14.04 and centos on this laptop and all works as expected. Today I tried to ...
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1answer
49 views

Still being Prompt for Password After enabling Public Keys

When I added my public key into my .ssh/user/authorized_keys file and I saved and restarted my server it gave me this error: initctl: Unable to connect to system bus: Failed to connect to socket ...
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1answer
30 views

xrdp on ubuntu server

I have set up xrdp on my ubuntu server 15.10, with mate desktop environment and it all works fine and dandy. Except for when I enable UFW. I have the following ports allowed all tcp 2222 (ssh) 3389 ...
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1answer
199 views

Can not install openssh-server on Ubuntu 16.04

As a fresh new install of Ubuntu 16.04 sudo apt-get install openssh-server outputs Also it is a fress install I could not understand why this happens. dpkg -l openssh\* Output is If ...
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IP changed and can't start Xwindows now

Client PC: Windows 7 with Putty 0.63. The IP changed on this PC. Ubuntu 14.04 Ubuntu shell: bash On client PC the Xwindows server is Hummingbird Exceed v14. All this worked fine until my client IP ...
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56 views

cannot ping or ssh, can connect to localhost

I can connect to the localhost using: ssh root@localhost However, when I try to connect to my Amazon EC2 instance using ssh, it says: ssh: connect to host ...
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1answer
18 views

Agent admitted failure to sign using the key

After a fresh ubuntu install, it seems I can't use any bzr branch commands. I get the following error: Agent admitted failure to sign using the key. Permission denied (publickey). ...
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63 views

How can a user account be disabled?

I've had a Ubuntu 12.04 LTS VM machine running my web sites for the past 2 years, on Windows Azure. I hadn't logged in for a few weeks, and today I tried to log in, via PuTTY/SSH username/password, ...
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1answer
32 views

How to tell git not to use rsa key but username + password

I guess I messed with my ssh configuration. Lately I cannot clone a local repository anymore. It seems like the git repository is accepting both publickey and password but instead of letting me ...
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1answer
28 views

How can'i pass this “ openssh-client' has no installation candidate ”

I am trying to use ssh command, but I have this: sudo ssh git-codecommit.us-east-1.amazonaws.com [sudo] password for dali: sudo: ssh: command not found So when i am trying to install ...
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38 views

Ubuntu Server Network Setup

Hello All I am new to the community, sorry if I break some of the questioning precedents. I am trying to set up an ssh server and I just installed the 14.04 Ubuntu Server on a desktop. I was not ...
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2answers
52 views

Know Ubuntu Distribution server or desktop

I am asking question after googling and I tried multiple solution but need a specific answer. I have logged in another pc with SSH and I need to know that the OS distribution is server or desktop. ...
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1answer
28 views

In file browser: connect to ssh server via other ssh server

in my file browser I have problems connecting remotely to a machine which sits behind a nasty firewall. Usually in a terminal our procedure to connect to that server goes via an ssh connection within ...
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1answer
55 views

Troubleshoot ssh prompting for password

I am using Ubuntu 15.10 and I am having trouble to login through ssh without password although I added my ssh keys. It was working before and then suddenly stopped working. I do not know what I did ...
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ssh connection timeout event though I'm connected in the separate terminal

Problem does not occur during first few minutes after restart of the client machine. I'm accessing via ssh using key my remote server. I cannot connect to this machine from other terminals. When I ...
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27 views

Automatic Kickstart installation how to add ssh keys?

I maked a FAI using Kickstart principles. The only package added openssh-server, but if I try to use post installation scripts (for example) to add ssh authorized_keys in ~/.ssh/ installation stops by ...
3
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1answer
45 views

Automating SSH login gives unresponsive remote-shell, dropping back to client-terminal (without errors)

I have a problem with the tool expect under Ubuntu 14.04 LTS. I want to automate ssh logins to some Sophos UTM Firewalls and evelate my rights directly after with "sudo su -" and the correct password. ...
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2answers
26 views

Unable to SSH to a host within my home LAN by using the hostname or local IP address

I want to access the SSH server on a Raspberry Pi (with Raspbian OS) from an SSH client on a X86_64 computer with Ubuntu 14.04, both located inside the same home LAN. I am able to SSH from the ...
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1answer
26 views

SSH Terminal like SecureCRT

On Windows I used to use SecureCRT and GNS3. Ubuntu also has GNS3 and its free. Is there a free alternative to SecureCRT, an SSH terminal which has a multi-tab facility to access multiple routers at ...
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67 views

Error when running “vino-preferences” on Ubuntu 15.10

I'm trying to configure and enable remote login on an Ubuntu 15.10 machine by connecting to it using ssh from Ubuntu 14 machine. On Ubuntu 15.10 machine, I've installed vino using the following ...
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26 views

scp syntax question

I'm having a little difficulty using scp to transfer files from a remote computer. The issue apparently has to do with the name of the directory the files are contained in. They're on a CD drive ...
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1answer
19 views

auto start a reverse ssh tunnel on system startup

I am have a remote machine behind a firewall that I wish to connect to through SSH. As far as I understand this can be achieved by using a reverse ssh tunnel. So the command I am using is ssh -N ...