OpenSSH (OpenBSD Secure Shell) is a set of computer programs providing encrypted communication sessions over a computer network using the SSH protocol.

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Communication between Host and Server with completely different sshmac/sshcipher

I have a little bit idea about sshcipher and sshmac. Recently i got to know that to change sshmac and sshcipher , we need to update sshd_config with required cipher/mac. Now the question here is : ...
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Problems with SSH Proxycommand

i have some problems with the ssh proxycommand. The authentication on the proxy works fine, but when i want to login to the remote-host it fails. The problem seems to be, that the proxy tries to login ...
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SSH Connection to Ubuntu Server fails with Connection closed <ip> [preauth]

Newly installed Ubuntu Server 16.04, have done the update and upgrades. Running sudo service ssh status says it is up and running. I marked OpenSSH-server during the installation. But I cannot ...
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Problems with ssh

I have two VMs running Ubuntu server 16.04 on the same host machine, let us call them A and B. They have different MAC addresses, which are both allowed on the network and can both access the ...
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22 views

Need assistance on installing ssh server

I am following the installation guide for setting up a ubuntu 14.04 MPICH cluster. The link to the guide is posted (https://help.ubuntu.com/community/MpichCluster). I am on part 7. I have followed ...
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OpenSSH on Ubuntu 16.04 shows ECDSA keys in an unusual format

I'm trying to SSH to my server, and the client is asking about the authenticity of the host. ECDSA key fingerprint is SHA256:bla bla bla With every version of OpenSSH I've used, ECDSA (or RSA) keys ...
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21 views

SSH: Set timeout for broken pipe

ssh has the paramater -o ConnectTimeout=10 to set the timeout in seconds when establishing the connection, but once the connection has been established, the parameter has no more effect. When an ...
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2answers
46 views

Unrecognized Service ssh when building from source

So I have a web server that is running 14.04LTS because that is the latest Ubuntu Distribution I can have through my VPS. I have been trying to install OpenSSH 7.2p2 via building the source code via ...
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2answers
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Can't use SSH at all

I'm having some problems when trying to use the command ssh-copy-id in my server, unfortunately I get the following response: ssh: connect to host 192.168.10.10 port 22: Connection refused I can't ...
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52 views

Log in to ssh slow for one user, but not another

I'm running a server at home with Ubuntu 14.04. I have two users on the machine, say user1 and user2, each able to ssh into the box. While user1 logs in very quickly, user2 takes about 20 seconds to ...
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1answer
29 views

Where does openssh-server get the “Last Login” information from?

Where does openssh-server get the "Last Login" information from? I recently logged in remotely from a Windows machine using SSH Secure Shell 3.2.9 and the reported last login was from a network ...
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63 views

Difference between pgp protocol and rsa protocol [closed]

These are the two widely used protocols in a number servers and email applications for security with public private key pair. What is the difference between them? What are the other popular protocols ...
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Please explain the complete steps involved in the installation of OpenSSH server on Ubuntu [duplicate]

I am having trouble installing openssh-server in Ubuntu. Particularly I want to know how to generate RSA public private key pair and the related concepts. What are the modifications to default config ...
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66 views

gedit not opening any file when launched from terminal, not only system files

My gedit application is working as normal when I launch it from launch menu and I can do all the kind of things. However when I go to terminal and issue the following command: gedit text1 Then I ...
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11 views

SSH Over Internal 10.42.0.1 IP?

Ubuntu 16 on both devices. The host machine running my ssh server is using a VPN. I created a wifi hotspot with a second adapter that shares my VPN IP with anyone connected to the hotspot. Now I'm ...
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18 views

How to use one machine as master in a cluster

I made a cluster using CSSH contains 10 machines in a network inclusive the machine that I use (currently opened machine) and the IP addresses are stored in /etc/clusters , after I opened them using: ...
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1answer
35 views

how can i acces website on linux server?

I have installed ntopng in my linux server and ntopng has web interface. But linux server doesn't and i want to connect my linux server somehow to my other computer in the same network which has ...
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58 views

Can't clone porject from bitbucket & github

I can't clone projets and I don't know why... I reinstalled ubuntu this morning, generated a public key with ssh-keygen and added my public key ~/.ssh/id_rsa.pub to bitbucket and github... EDIT 2 - ...
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ssh or openssh not listed in the Ubuntu Software program

I am trying to install ssh on a fresh install of 16.04 LTS but it is not listed in Ubuntu Software program
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137 views

OpenSSH index out of bounds when trying to connect

I am trying to connect to a SSH server that is out of my control with the following command: ssh -v user@12.34.56.78 -p 12345 Previously, this command works on Ubuntu 14.04 with OpenSSH version 6.6....
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576 views

OpenSSH : Putty won't work with Ubuntu server 16.04

We use Putty to access our Linux servers from our windows workstations... Today we created new servers with Ubuntu server 16.04 and installed openssh with tasksel (as allways). When we try to ...
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1answer
99 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 openssh-...
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114 views

Mitigating CVE-2016-3115 By Disabling X11Forwarding

I want to mitigate CVE-2016-3115. The report from OpenSSH states that the vulnerability exists when X11Forwarding is enabled. It shows as enabled in my /etc/ssh/sshd_config, but I don't know why. It'...
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54 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 openssh-...
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89 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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38 views

Ubuntu SSH & HTTPS Connection Issues after OS update

So yesterday everything was working great. My Ubuntu 14.04 was updated with linux-image-extra-3.13.0-85.129 update. When I start the computer this morning, I noticed that I can no longer SSH to my ...
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79 views

ssh:permission denied,please try again

I am having two laptops both having ubuntu 14.04 LTS and they have wireless connection. When I try to access other system,it says permission denied,try again.What to do? The following after I type ...
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1answer
32 views

SSH locked out need to put files onto server

Okay this is my last hope I have a server which i am locked out on because we were testing some different host files in the /etc/ssh folder. I am trying to get my back up onto the server so that i ...
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1answer
35 views

Unable to use apt-get on Ubuntu 12.04 Virtual Machine

My ubuntu was working just fine but today it has started giving me problems. I am not able to use apt-get. there is some openssh dependency issue. I tried to solve by reading forums but I could not ...
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ssh Help logging to remote VMware

http://imgur.com/PLCiwWh Can anyone help me figure out that I am doing wrong here? I am trying to remotely login to another virtual machine.
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SSH permission denied from Linux Ubuntu to Windows using keys

I am a beginner in hadoop, and I am trying to set-up hadoop cluster in fully distribution mode. My master is windows and my slave machine is Linux running on VM. I have created SSH keys and in both ...
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116 views

SSH client is not working on ubuntu 15.10

SSH client showing error $ssh user@IP address ssh: connect to host 53.37.119.147 port 22: Connection timed out After checking the SSH status it shows the error $ sudo service ssh status ● ssh....
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88 views

SSH public key added but still prompt for password

I've encountered an error when trying to setup so I can connect to my HTPC with my laptop, I've followed this guide from ubuntu help This is my ~/.ssh/ permissions on my remote host -rw------- 1 ...
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SSH client on Ubuntu 15.10 is not working with public key

I am trying to ssh from my Ubuntu machine to other SSH servers, and also to itself but it is not working with the public key - it always prompts for a password. verbose output from ssh client debug1:...
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OpenSSH intermittent error ( ssh_exchange_identification: Connection closed by remote host ) on a public IP

I faced a very strange issue on one of my public SSH server. It was failing intermittently with the error below: ssh_exchange_identification: Connection closed by remote host We all know that it'...
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2answers
117 views

how to install openssh from usb?

Hi I have installed ubuntu from bootable usb. During installation I did not pay attention for Openssh server in software selection screen. however is it possible to reboot from usb to just install ...
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I have a problem with my sftp server

OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: ...
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Error running parallel code ubuntu server: ssh-askpass not found

I have ubuntu 14.04 server with PBS queue system. I'm trying to run a parallel code (I only have the binaries). The code exits and this is one of the messages: ssh_askpass: exec(/usr/libexec/openssh/...
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28 views

dependency error while installing openssh client

As you can see from the image I am unable to install openssh-client because of dependency error, I have tried this process on a different machine and it worked but it doesn't work on my machine can ...
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210 views

VNC vino over SSH tunnel ONLY

I've been searching for hours now, can't figure this one out. I am trying to make the following happen: Client: remmina + ssh tunnel Server: Lubuntu + openssh server (public key authentication) + ...
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37 views

Create openssh connection over direct ethernet connection

I'm trying to set up an ssh conncection with openssh and putty. I attached an ethernet cable from the device to my pc . The device doesn't have internet conncetion. Now I would like to directly ...
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203 views

openssh version 6.9+ upstart problems

I'm on trusty (14.04.2 LTS). current version of openssh=6.6 (OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3, OpenSSL 1.0.1f 6 Jan 2014) Was told to upgrade to openssh=6.9 or greater. Why does the ssh daemon now ...
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10k views

key_load_public: invalid format with scp or git clone on Ubuntu 15.10

After a fresh install of Ubuntu 15.10, when using scp or git clone, I get the following warning (the command itself doesn't fail): key_load_public: invalid format How can I get rid of this warning? ...
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144 views

need to apply unstable security patch for ssh (1:6.6p1-2ubuntu1) on 14.04

I am running ubuntu 14.04 as a proxy server. It has failed PCI scan due to CVE-2014-2653. I see there is a patch for this, but it is listed as unstable. I'm not sure how to apply this patch to the ...
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1answer
820 views

ssh authentication with id_rsa key not working

Openssh seems to locate my id_rsa key but then after: debug2: we sent a publickey packet, wait for reply It start over again with: debug1: Authentications that can continue: publickey,password ...
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653 views

Can't ssh into my home PC remotely

I have a computer at home running on 14.04. I would like to be able to send jobs to that computer (I will call it server) from my laptop (running on 15.04) and share files between the two. I am able ...
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114 views

Setup gateway server for SSH over HTTPS?

I'm on host x, and I want to connect to <ommitted>.compute.amazonaws.com via host z. $ sudo nmap -sS <ommitted>.amazonaws.com Starting Nmap 6.47 ( http://nmap.org ) at 2015-10-21 17:39 ...
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Like SSH do we have any other remote connectivity software for Ubuntu?

I have seen openssh is mostly used for connectivity purpose. Do we have similar/more advanced connectivity software for Ubuntu?
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141 views

How can I get spammy ssh “Starting Session” messages out of my syslog view?

When I was running 14.04, I could use my Mac to run ssh andy@eeePC8G.local 'tail /var/log/syslog' and see the tail of syslog. I had GeekTool on the Mac setup to run this command frequently and display ...
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Disable openssh password for some application

I am running an application which transfer file to other PC but every time i have to enter ssh login password which i had disabled by generating a key between the two PC. I don't want to enter ...