SSH (Secure SHell) is a protocol for running commands on a remote computer.

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xtightvnc through ssh gateway — connection refused

Following setup: homepc -> gateway -> workpc workpc:~$ tightvncserver :12 homepc:~$ ssh -N gatewayuser@gateway -L 1212:workpc:5912 Now I try to connect via homepc:~$ xtightvncviewer ...
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157 views

SSH & ForwardX11 vs ForwardX11Trusted --> beyond my grasp

I am on Ubuntu 14.04 and trying to get my head around ForwardX11 vs ForwardX11Trusted. My default ssh_config contains the following lines: # ForwardX11 no # ForwardX11Trusted yes Further, man ...
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58 views

MIT Shared Memory Extension or MIT-SHM over ssh

I successfully created a privileged lxc archlinux container on an archlinux host with lxc. I set up a static ip via dnsmasq and ssh into it and I use xauth to forward X11. I then call programs like ...
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65 views

Mount via SSHFS in NFS filesystem

As a student I have access to a cluster of teaching lab computers, at each of the machines all the home folders (including my) are mounted via NFS. I also have a desktop PC. I want to mount my home ...
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87 views

ssh-agent on CentOS 6.5 keeps “disabling” itself

I recently installed git on my CentOS 6.5 system. During the process I setup a key/pair for GitHub so I don't have to enter a password for every git process. I did this by adding the rsa file to ...
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59 views

What information is sent from client to the server when a SSH connection is established?

So let's say I'm on machine A and connect to machine B, and then from there I connect to machine C (with three different usernames). So the SSH connections are: A (john) --> B (eli) --> C(bill) ...
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68 views

Lazy mount of remote filesystem (with sshfs)

I have a remote computer, and I mount its filesystem with sshfs to my local folder ~/user@host, like that: sshfs user@host: ~/user@host Works nice, but I want to implement "lazy" mount: i.e. I ...
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340 views

Force ssh to always use SSH_ASKPASS

I want to force ssh to always use the program specified by SSH_ASKPASS. In my case the program is just a bash script returning the passphrase. The problem is, as the ssh documentation says: If ...
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37 views

ssh-copy-id hangs with 8192-bit key

Having a bit of an issue with ssh-copy-id it seems to hang when i try to copy 8192-bit rsa keys accross to an OpenIndiana server. I running OS X as my client OS. Is anyone aware of issues with keys of ...
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29 views

libpam load pam modules at every connection

I want to reduce ssh connection time, by debugging sshd have found that libpam is loading all pam modules specified in /etc/pam.d/sshd file at every connection. How to configure/modifiy libpam such ...
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101 views

ssh local tunnel to VM

So, can anyone explain why this doesn't work? Everything from remote host (192.168.1.3): ssh -L 9000:192.168.1.2:80 login@192.168.1.2 elinks http:127.0.0.1:9000 and I can see a web page. other ...
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74 views

Fix fonts through ssh

There seems to be some problems with the font size when connecting remotely to another Xserver using ssh. I am using manjaro linux and awesomewm. As far as I understand, the local font settings are ...
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409 views

Automate `pbrun su` via plink

I am trying to automate an sFTP process for our project. When I login with PuTTY and manually type the command pbrun su - user1, root access is given to user1 and I am able to do the sFTP process. I ...
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73 views

ssh log sent to email in Cygwin

I am using Cygwin in Windows 7. I am trying to make my syslog-ng daemon send a ssh log via email to me when ever someone tries to log into my computer. I tried using the code below (entered into ...
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105 views

sshfs and Emacs: file changed on the disk

I am using Mac 10.6.8 SSHFS version 2.4 fuse4x library version: FUSE 2.8.7 / fuse4x 0.9.2 I connect via sshfs to a remote cluster (via a bridge). I modify the remote files with emacs. The problem ...
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175 views

IBM AIX: How do I set up SSH X forwarding on an unprivileged user with no home?

Long story short: I have an AIX server where my user is unprivileged and has no home directory, and it is not easy to fix this because OS-level management of this server is outside of my jurisdiction. ...
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197 views

How to monitor user who using dropbear ssh tunneling?

I was used OpenSSH in my debian server. I can see who is using ssh tunneling using either nethogs or top command. When i change from openssh to dropbear i cant monitor user again. In nethogs or top ...
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118 views

SSH to a machine that is getting it's network connection from an Android device(Google TV)

I have a Linux(Ubuntu) machine for my HTPC. It's running XBMC and I control it via my IR remote control. I don't have a (wired) keyboard to control it. It has Wifi adaptor but it's not installed. I ...
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321 views

Connect two VirtualBox virtual machines through SSH

I have two VirtualBox virtual machines: one with SuSE Enterprise 10 and one with Red Hat Enterprise 5. I want to connect through SSH from RedHat to SuSE. Both are configured to use a bridged adapter ...
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874 views

putty connection works but ssh command line refuses password authentication

I'm struggling quite a lot around ssh tunnels today. First, here is my configuration: My local machine, a PC with windows XP (ip=l.l.l.l) My remote server, with a CentOs 5 installed (ip=x.x.x.x) ...
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107 views

Reverse ssh-agent forwarding and unlocking remote keys with your local keys

So the following two things should both be possible to do with ssh the question is just how difficult they would be and I'm hoping someone can give me an easy answer. 1) Suppose I have several ...
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1k views

Using sshpass, return code (exit status) differs for reasons unknown using valid commands

There are a few things going on here but I think ultimately, either CLish or SSH is returning an exit code that is messing up my work flow. I'm attempting to connect to a remote machine (CLish shell) ...
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558 views

Use dd to backup disk image within an OpenVZ container

I want to use dd to backup the disk of an OpenVZ VPS in addition to traditional cold tar backups. Because I may need to migrate to a different VPS provider. From end user point of view, OpenVZ ...
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269 views

Making ChrootDirectory directory writable by SFTP user

If a user logs into a machine via SFTP, one can make use of ChrootDirectory keyword to give an illusion that user is in a root directory. But that directory is only writable by root user. I would love ...
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111 views

Client-server app for sending and monitoring asynchronous jobs

I am looking for a desktop app/IDE in which you can: Maintain a list of UNIX/Linux connections Be able to write a script locally in a local editor, not SCP files to the host or writing them on the ...
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59 views

Run a script (for an app GUI) when logged from NX but limit shell commands on terminal

I have a user which will be accessing an app GUI via NX NoMachine. I want to allow this user to execute the command to bring up the app GUI (done automatically by NX) BUT prevent him from executing ...
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317 views

Launch X11vnc server on Ubuntu remote desktop through SSH

I have a Windows computer and I am currently connected to a Ubuntu 12.04 system through SSH using CRT on my Windows computer. I would like to know the commands that I need to run from my SSH session ...
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566 views

ssh: “Error reading response length from authentication socket”

I have a Makefile with some ssh and rsync commands. All of them are executed correctly, but give the following error message: Error reading response length from authentication socket. I don't like ...
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22 views

sshd suddenly wants a passphrase from Linux box, but not from windows (putty)

My Amazon EC2 instance running Ubuntu is no longer letting me ssh in via my local Linux system. I haven't changed a darned thing on either side but now it wants a passphrase and says nope when I ...
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5 views

tmux session stops updating screen randomly

I use tmux 1.6-2 on a Debian 7.6 (wheezy). I open a new session and start a long running script that gives updates in form of a progress bar and an activity indicator (spinning bar: /-\|/ ). When ...
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25 views

Difficulty Installing SSH on Oracle RHEL 5.5

I am having difficulty installing SSH on RHEL 5.5 - I have disabled my Firewall and SELinux. I have gone through: Oracle Docs, to see if SSH is enabled, but I got: To check if SSH is enabled: # ...
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16 views

Why would SSH server not accept forwarded Kerberos ticket?

I have an environment where I can SSH in using forwarded Kerberos credentials (using ASP.NET delegation), however in another I cannot. I have GSSAPIAuthentication yes in the ~/.ssh/config on each ...
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34 views

Seeing SSH debug messages in Terminal/console

I am seeing "debug3: Received SSH2_MSG_IGNORE" appear in the terminal on a RHEL 6 Linux server. I thought maybe rsyslog had a console entry, but it doesn't. sshd_config has logging at AUTHPRIV, and ...
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71 views

Cant ssh, connection terminates immediately with exit status 254

The most recent thing I remember is changing the soft and hard memlock ulimit to unlimited. Now I cant ssh into the machine. This is the ssh log. Authenticated to IP ([IP]:22). debug1: channel 0: ...
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36 views

How to pass multiple commands via pssh and multiple xterms

I'm attempting to open multiple xterms and run a command as an SAP user via sudo using pssh. So far, I'm able to run PSSH to a file of servers with no check for keys, open every xterm in the servers ...
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21 views

Making proxies on Debian

Hi guys I am trying to create SOCKS Proxies on my VPS and currently am not getting too far so any help is well appreciated. Here's a few details on my VPS: It is running Debian linux, has 512mb ram ...
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55 views

Unable to SSH into Puppy Linux, even though SSHD is running

I installed OpenSSH client and server on my Puppy Linux computer. That computer is behind a router. I tried to ssh into it over the internet (outside the router) but it times out. Also doesn't work if ...
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45 views

SSH can't use internet when multiple interfaces present in route

I'm trying to make SSH tunnel connection on any possible interface (which has internet connection). I'm currently using ppp0 and eth0 interfaces. ppp0 always has internet and reinitialized if ...
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51 views

Root able to login but non root users are denied - PAM

One of our servers is not letting non-root users login, but root can login without any issues. The following are the messages from /var/log/secure: Jun 24 18:08:43 jonnserver sshd[14470]: debug1: ...
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27 views

Running “gnome-session” or “gnome-panel” over SSH via X yields black bar

I can VNC fine to my machine. But VNC is slow, and to try something else, I wanted to use gnome-session or gnome-panel over SSH via X. But it simply gives me a black bar across the whole screen. No ...
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98 views

can't connect using telnet, ssh. Connection refused

My imagine network (using marionnet) looks like that: m1[eth0 192.168.1.1/26] switch m2[eth0 192.168.1.2/26] [eth1 192.168.2.1/28] switch m2[eth0 192.168.2.2/28] I can ping from any machine to ...
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38 views

Centos not respecting ClientAliveCountMax

I'm running Centos 6.3 and trying to connect to it via OS X through capistrano deploying a Rails project. Capistrano is notorious for not respecting ServerAliveInternal from the client so I must set ...
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51 views

Google Compute Engine with multiple SSH users, Debian

I have managed to set up my server with a default user 'admin'. The sshKeys in the metadata is set with the following format, described in the google documentation. key: sshKeys value: ...
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86 views

sshd without pam slower

I am running OpenSSH_6.5 with UsePAM yes in my board. I have observed that with UsePAM no in /etc/ssh/sshd_config, sshd runs slower than previous case. How is this possible? My understanding is ...
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246 views

Dropbear SSH on Cygwin won't allow passwordless login

I am using Dropbear SSH running on Cygwin, on Windows 7, on a VMware virtual machine, on Windows 8.1. On my physical OS I have Cygwin and I am trying to get passwordless login using openssh on ...
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42 views

How to add Public IP to Cent OS

I am trying to configure a Public(Static) IP in Cent OS 6.4. For this, I made a copy of eth0(added local IP, so that I can connect the system to Internet) and named it to eth0:0(added Public IP, so ...
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44 views

Is it possible to attach `kinit` to the first attempt to `ssh` without a Kerberos ticket?

My university uses Kerberos-based authentication for login to our unix servers. One way to get passwordless login is to run kinit, type my password, and then run ssh@host. For this setup, I do the ...
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52 views

Shell script use ssh forwarding to send a file to a second system

I have ssh forwarding enabled and ssh to server A. On server A I want to run a script as root and take advantage of the ssh key being forwarded for USER to send a file to system B. I'm getting a ...
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56 views

ssh can't connect to CentOS at login screen

I've a server that running CentOS 6.4 final, I tried putty to connect at login screen, it show Network error: Connection refused, but it works while I've logged in to server. Anyone know what's going ...
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135 views

On ssh connection the auth.log shows as source IP the external IP of the server instead of the IP of the client

I have a very odd situation with my ssh connection. Every time I connect to my server, whatever is my external ip, the connection have as source the server's external ip. Example Server S.O.: ...