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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Unable to SSH into a server or VM on same server

So I have an older file server running on a VM and up until a few days ago I could ssh into it but now it's just hanging at a certain point. I also cannot ssh into the server running the VM file ...
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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 ...
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2answers
42 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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16 views

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: ...
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1answer
21 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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1answer
56 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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28 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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83 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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1answer
3k 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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75 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
94 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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208 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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58 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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2answers
36 views

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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1answer
66 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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35 views

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 ...
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2answers
358 views

Whoy doesn't openssh-server work in ubuntu14.04

Here is all what I can show. [skynet]~> apt-get install openssh-server Reading package lists... Done Building dependency tree Reading state information... Done openssh-server is already ...
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17 views

How do I configure OpenSSH to deliver the server's environment and paths to the connecting session?

I've just installed an OpenSSH server through apt-get. Immediately, I noticed that when connecting through SSH I don't have the same paths enabled as I do when I am physically using the server ...
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2answers
59 views

High level overview of how SSH works and is setup on Ubuntu [closed]

I'm just starting out with SSH and I need somebody who's knowledgeable on SSH on Ubuntu/Linux to give me the whole picture of working with SSH. I currently know that SSH is used to securely connect ...
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181 views

How to use bind address for ssh port forwarding?

I want to forward my port 2222 on localhost to remote host's port 2223 on the address 127.0.0.2. I am trying to bind the address 127.0.0.2 with this command: ssh -R [127.0.0.2]:2223:localhost:2222 ...
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130 views

How to set environment variable for sshd

I have Ubuntu server 14.04 on a server with openssl version 1.0.1f and openssh version 6.6. In my openssl.cnf I have subjectAltName=${ENV::ALTNAME} so that I can set subjectAltName on the commandline ...
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1answer
69 views

Execute prelogin scripts for SSH

I would like to know how I can execute a local server script, for instance send a mail using mailx, when a ssh session is opened, pre-login stage. When a ssh connection comes into the server, I ...
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1answer
37 views

OpenSSH Port Forwarding Remotely

I have the ff: setup Server : Ubuntu 14.04 (192.168.1.102) openssh server & client installed Router : Lynksys E1000 Port forwarded added ( ssh - 20-80 both 192.168.1.102 ) Now in another unit ...
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127 views

Problems connecting Putty SSH to Ubuntu openssh-server

Just installed a clean copy of Ubuntu 14.04 Desktop (amd64) onto a Dell precision T5400. Installed the openssh-server and tried to connect from Windows with Putty. Sometime the connection works for a ...
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76 views

SFTP / openssh logging with chrooted users

I just tried to follow the steps from this thread: http://ubuntuforums.org/showthread.php?t=2081637 For some reason, it does not work. I tried to follow exactly those steps, but the log file is not ...
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4answers
3k views

Uninstalling ssh

ssh is installed in my system. ssh -V OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014 But when I try to uninstall it completely using sudo apt-get purge openssh-server it says ...
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2answers
707 views

How to disable autostart of SSHD in Ubuntu 15.04

In older versions of Ubuntu I commented out the "start on ..." line in /etc/init/ssh.conf. This worked well, but not in Ubuntu 15.04.
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2answers
238 views

SSH to local ip in external network

I know there is a lot of information about this subject but still I do not understand something. We have internal wiifi network that include 4 desktops, each one has internal local ip address. The ...
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265 views

Something wrong in 14.04 LTS with ssh when no password is authorized by remote server

After loosing days for a solution (including here), I will ask more expert people about a way to connect a new desktop ubuntu 14.04.LTS to some ubuntu 14.04 LTS servers accessible only by using a ...
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3answers
568 views

Ubuntu 12.04, PCI, and CVE-2015-5352

PCI compliance will fail when the CVE-2015-5352 vulnerability is present. OpenSSH 6.9 fixes this vulnerability, but none of the supported versions of Ubuntu (12.04, 14.04, 15.04 and 15.10) have been ...
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2answers
3k views

Installed 15.04, cannot restart ssh daemon

As the title says, I installed 15.04. One of the first things I did was sudo apt-get install openssh-server. The next command was sudo restart ssh, which is greeted with an output of: restart: ...
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207 views

Passwordless ssh to vagrant to load another user after vagrant ssh

I have a new user in my vagrant box(trusty64) and I am trying to ssh into it. Instead of logging into vagrant user after vagrant up, I want to login to my username. What I have done so far Created ...
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1answer
3k views

How to generate Openssl .pem file and where we have to place it

I want to generate a OpenSSL .pem file to allow the remote login via ssh using .pem file at the place of password. I am able to generate key as well as .crt and .pem file using the following sudo ...
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99 views

cannot ssh into an ubuntu server which seems to be due to a problem on server side

i'm trying to login in to an ubuntu server from windows msysgit providing the identity explicitly. output of ssh -i .ssh/id_rsa user@site is $ ssh -i .ssh\id_rsa user@user.koding.io -vvv > ...
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2answers
128 views

Connection refused even after installing openssh-server

I have been spending the last 4 hours trying to get my VNC connection to work. Eventually, I realized it was because my Ubuntu remote host was unable to host SSH connections- even though I had already ...
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1answer
77 views

SSH-Login with key does not work correctly

I got a system where I want to get access via ssh-keys to. I created an user called monitor and created a file called authorized_keys in /home/monitor/.ssh/ and inserted 2 public keys: Publickey #1 ...
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3answers
2k views

Difference between Software Selection Servers

I am installing Ubuntu Server, and I want to know what is the difference between these: [ ] OpenSSH server [ ] DNS server [ ] LAMP server [ ] Mail server [ ] PostgreSQL server [ ] Print server [ ] ...
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82 views

SPAMHaus/ CBL Blocking List:: UNIX System (Firewall)

I am no linux/ unix guru but CBL and Spamhaus are blocking us every 8 hours roughly and recording it as SPAM. I have completed their instructions to do the following but am concerned i have done it ...
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1answer
61 views

OpenSSH client not connecting after deleting id_rsa

So I stupidly overwrote my id_rsa and id_rsa.pub files earlier, and I just decied to rm -rf the whole .ssh folder because it was all corrupted/broken after tinkering with it. Ever since that when I ...
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1answer
127 views

SSH to Ubuntu Desktop [duplicate]

I've setup an SSH server on my Ubuntu desktop at home using a dynamic DNS service (NOIP). I have a wi-fi-only Android tablet running Android version 4.4.2. Port 22 is forwarded, ufw is disabled ...
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1answer
227 views

Messed up with my ssh_config file. How can I recover the original file?

I was setting up ssh on Ubuntu. I accidentally copied the contents of sshd_config in ssh_config file! Is there a place where I can find the original one? Fortunately I didn't touch the ssh_config. I ...
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1answer
246 views

manually change the startup scripts in /etc/rc2.d

I use ubuntu 14.10 and I want to stop the SSH service from auto startup. Will it be enough to change the start up script to be /etc/rc2.d/K03ssh or I should do sudo update-rc.d -f ssh remove also
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87 views

SSH outside the local network

I have Ubuntu 14.04 LTS installed on a Toshiba Satellite L655. I've recently installed an SSH server on the machine and it works fine when connecting to it using 192.168.1.3 but when I try that using ...
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1answer
3k views

apt-get dependency issue Open-SSH Client

This is on an Ubuntu 12.04 Server. I'm getting this error when trying to run any apt-get install (trying to install unrelated, arbitrary packages): dpkg: dependency problems prevent configuration of ...
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1answer
78 views

Building openssh from source on ubuntu

Hi I'm building openssh from source. From source primarily because, I want to collect more logs than what openssh already writes in /var/log/auth.log file. In one of the c files of the source ...
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1answer
200 views

OpenSSH: X-Forwarding: wrong authorisation protocol

I have edited the /etc/ssh/sshd_config so that: AllowAgentForwarding yes AllowTcpForwarding yes X11Forwarding yes X11DisplayOffset 10 X11UseLocalHost no And I connect to the host with: ssh -X ...
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2answers
4k views

Error `could not load host key` when trying to recreate SSH host keys

I am trying to recreate the ssh-server host keys. I have at least two ways to do this: With dpkg-reconfigure dpkg-reconfigure openssh-server This works fine, but I cannot give the key length ...
4
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1answer
4k views

Limit SFTP user access to specified directory

I have a Ubuntu 14.04 server installed with open ssh. I'd like to configure sftp for customers to be able to download files only. In other words, I put files in a directory that they are jailed to. ...
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2answers
104 views

How to run openssh-server compiled from source

I have compiled openssh source using ./configure make and make install Now it has compiled and installed binaries, config files and the server at /usr/local/bin /usr/local/etc /usr/local/sbin ...