OpenSSH is one of the most popular implementations of SSH used today and available by default in many Linux and Unix-like operating systems.

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1answer
71 views

ssh not working with yes

I had to solve a fringe case lately where I had to add a number of server fingerprints to a user's known_hosts (the authorization is performed with a keypair). I thought the easiest solution would be ...
7
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5answers
8k views

How to edit known_hosts when several hosts share the same IP and DNS name?

I regularly ssh into a computer which is a dual-boot OS X / Linux computer. The two OS instance do not share the same host key, so they can be seen as two host sharing the same IP and DNS. Let's say ...
2
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0answers
598 views

ProxyCommand with sudo

I'm trying to set up SSH so that I can easily log into an server that is accessible only via a sudo to an intermediate server. From the command line, logging into it is of the form: sudo -u admin ...
2
votes
3answers
207 views

How to prevent a user from viewing the entire file-system?

I've set up SFTP/SSH so that a user can only put to their home directory, however, they can still cd to all other directories and get files that they see. How can I prevent this? EDIT: My ...
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0answers
424 views

trying to remote in to work computer via an ssh tunnel [closed]

Trying to remote into a windows machine from a mac using their instructions: On your home computer, install and open putty (http://www.putty.org/) Enter a name into the Saved Sessions field. Enter ...
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2answers
2k views

How can I SSH into home computer from internet

I have a setup like follows I have a router that connects to the INTERNET, where my ISP provides dynamic ip two systems are connected to the router with locl ip 192.168.1.2 and 192.168.1.3 the ...
1
vote
1answer
2k views

Stop ssh tunnel (stop listening on port without killing process)

In an ssh session, one can start tunneling with the keystrokes ~C and entering (e.g.) -L80:localhost:80. However, is there any way to stop tunneling on that port (short of killing the process)?
9
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1answer
4k views

Does the right half of the rsa public key matter?

In a public key file "id_rsa.pub" generated by ssh-keygen, does the part after the == matter? I ask because when I changed "root@somedomain.com" to "root", it seems to still work. More generally, I ...
1
vote
1answer
132 views

How do I check if a process (Firefox) has quit?

I am using Ubuntu 12.04 64-bit, with all updates installed. I made a simple shell script that starts a SOCKS5 tunnel and launches Firefox (with correct network proxy settings) to use the tunnel. How ...
1
vote
1answer
60 views

Are there situations in which ssh -t shouldn't be used?

Working within a framework commands are issued to remote machines using ssh. Recently the -t option was added to the command in order to get it to work properly with sudo. However this option will ...
2
votes
1answer
628 views

cygwin rsync over ssh very slow

I have 2 machines running Windows Xp SP3. I have cygwin installed on both, version 1.7. I have rsync and ssh installed on both, and configured using default settings as per ssh-host-config and ...
1
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1answer
425 views

Configure OpenSSH to use a non-windows account for authentication?

Is there anyway to configure OpenSSH to use a non-windows account for authentication? I want to create a kind of virtual user, where I can login with credentials I've created specifically to login in ...
1
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1answer
145 views

Run SSH trough a proxy

I have a question. How can i run SSH trough a proxy or a SSH Tunneling Protocol? For example i have a computer(Ubuntu) with ip eg. 123.123.123.123 and i want to connect to my server trough a proxy ...
1
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1answer
38 views

Setting up ssh group keys without affecting ~/.ssh/config in Linux

I have to setup an ssh group key used for publishing to a remote git repository. As git (as well as I presume many other programs) don't allow defining a flag lag ssh -i the information which key is ...
1
vote
1answer
2k views

How to deal with ssh's “WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!”? [duplicate]

Possible Duplicate: Ignore known-hosts security in SSH for some addresses I often need to login to multiple remote stations that are just placed to the same static IPs for me. SSH complains ...
6
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1answer
2k views

Nohup over ssh won't return

I am trying to do [me@myPc]$ ssh me@server "nohup myBashScript.sh &" My goal is to launch the process on the server, and then immediately return. It is not working: The job is started on ...
1
vote
2answers
355 views

OpenSSH does not accept public key?

I've been trying to solve this for a while, but I'm admittedly quite stumped. I just started up a new server and was setting up OpenSSH to use key-based SSH logins, but I've run into quite a dilemma. ...
0
votes
1answer
317 views

Mac OSX OpenSSH file Transfer not working

I'm currently trying to get a file on my school account from home on my mac using SSH. I have the hostname and I can get in just fine, but transferring files is like smashing my head into a wall over ...
3
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1answer
2k views

openssh in Windows 7, run ssh-add once for all cmd instances

I have installed openSSH as part of the latest cygwin distribution. My goal is to use the ssh-agent from native window console (cmd) in order to login passwordless in a various number of Linux ...
2
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1answer
457 views

Why is pasting into SSH so painfully slow?

Most of the time whenever I post reasonably large chunks into an SSH terminal, it will absolutely crawl through it at a rate of something like 1000 characters every 20 seconds; sometimes practically ...
1
vote
1answer
2k views

How do you set the HOME path with SSH on Cygwin?

I have a bunch of users that I'd like to set the default HOME directory for so that when they log into SSHD running on Cygwin on Windows Server 2008, they get set at a specific directory ...
2
votes
2answers
1k views

networking with ssh thru wireless

I am using Ubuntu 12.04 64bit on my desktop and my laptop. Have install openssh client and server on both of them. My desktop is connected to ADSL2+ Router TD-8840 with wired connection and has ...
1
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1answer
343 views

How to easily bounce arbitrary connections through known SSH server, to avoid port firewalling

I was looking for a method to connect to arbitrary SSH servers through a known SSH proxy, without having to hardcode those target servers. For example, let's say that I cannot access github.com from ...
5
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2answers
1k views

cygwin ssh shortcut on windows desktop

I have multiple servers that I need to remote into. I prefer Cygwin over Putty to do so. Anyhows - the process of opening my cool Mintty window and then typing the following commands takes too long. ...
2
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2answers
102 views

Generating SSH Keys on the Server

I have set up sshd on a Linux server and managed to log in via keys generated using ssh-keygen. However, I have made the following observation: When I generate the key pair on the client and copy the ...
1
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1answer
96 views

What is the highest SELinux privilege(role)?

I want to know what role is the highest role of SELinux. If I am mistaken, can anyone tell me what roles are available by default in SELinux?
2
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1answer
1k views

Convert ssh public key to gpg

I have someone's ssh public key and I want to encrypt a message with it so that he is the only one who can read it. However, a simple import with gpg --import doesn't work because the format is ...
2
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1answer
175 views

Having trouble logging onto my ssh server

I feel pretty dumb asking this but I have been working on this for a couple days now (on and off) and I cannot figure it out. I have just installed lubuntu on my machine and I can ssh locally onto it ...
1
vote
1answer
431 views

ASC key file, login on cent OS using WINSCP

My system admin given me a file with extension .asc. to loging to the Server, but i am unable to login , as WINSCP or putty says this key is in different format, is another tool like wnscp and putty ...
0
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1answer
1k views

openssh on Windows 7 server, putty displays “refused our key”

I installed openssh as a service with the help of cygwin using this tutorial I can ssh into localhost from cygwin. However, when I try to do this from putty, I get a "server refused our key" error. ...
0
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1answer
892 views

ssh localhost works, but ssh [external url of localhost] doesn't

I'm trying to work out how to ssh into a machine at work (it runs an RHEL-based distribution with OpenSSH 5.3). I have been given instructions on how to set up keys, permissions, etc., which have ...
0
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1answer
282 views

OpenSSH: Restriction on Local Port Forwarding for groups

I'm trying to restrict users who connect via ssh on a server (with OpenSSH) to do local port forwarding on certain ports only. I've found that setting the permitopen="address:port" option in their ...
4
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2answers
758 views

SSH remote login without password is very slow

SSH Client - Mac OS X Lion SSH Server - Debian /etc/hosts on Mac -> [IP of Debian] mydebian Public key of Mac has already been put to authorized_key in root@mydebian:/root/.ssh 'UseDNS no' has been ...
0
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1answer
642 views

SSH hangs on exit with background jobs - inconsistently

On different Linux boxes, I see different behavior with respect to SSH sessions hanging on exit when there are background jobs running. If I do exactly the same thing $ for f in 1 2 3 4 5; do echo ...
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vote
2answers
4k views

I get a permission denied (public key) when I try to scp in ssh

I can login to the remote server via ssh and navigate through it's file system, but as soon as I try to scp a file from the server to my laptop I get an error message. Example: user@server:/file$ ...
0
votes
1answer
3k views

ssh-agent and ssh-add

Does anyone know how to make it so that I don't have to add my keys manually using ssh-add? Every time I log into my Ubuntu server box, I have to start the ssh-agent and then use ssh-add before my ...
2
votes
1answer
2k views

What's the principle behind OpenSSH subsystems (or command= option)?

In OpenSSH one can declare a subsystem in the configuration file (/etc/ssh/sshd_config) or force a command such as svnserve to be executed by including this in the authorized_keys line for a ...
2
votes
1answer
3k views

Is it better to run OpenSSH in cygwin or freesshd (on Windows Server 2003)

I found an article on Petri that explains how to install OpenSSH to Windows via cygwin. I know that OpenSSH is basically the standard SSH server for *nix distros and was wondering if that means it's ...
1
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1answer
2k views

sshd_config AllowUsers Should Root Be Allowed?

I am asking here as i do not want to get locked out of my server. I do not want to allow root login to ssh, however if a user enters a "su" command i want them to be able to become root. So do i ...
3
votes
1answer
760 views

Why would anyone install openssh-client instead of openssh-server? [closed]

I installed openssh-server on two pc's. I can connect from both from the one to the other. So if openssh-server sends as well as receives ssh, why would you install the openssh-client, just to make ...
0
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0answers
54 views

Switching user in openssh using PAM

I'm trying to write a PAModule which will use compare the inserted username against a file. If the username exists in the file, it will change the username to root (since the username does not really ...
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vote
4answers
4k views

sshd refuse connection?

For some reason I cannot access from my vitrual machine my remote virtual server at a server farm and instead it gives me this error message: OpenSSH_5.9p1, OpenSSL 1.0.0g 18 Jan 2012 debug1: ...
4
votes
1answer
2k views

How to reduce latency with openssh?

I'm ssh-ing to a server several thousands kilometers away, and every keystroke takes 500-800ms, so it is getting annoying. Is it possible to have my ssh client cache each line I type locally and ...
1
vote
1answer
275 views

Forwarding X through 2 servers (4 boxes involved)

I'm trying to run a web browser on my desktop machine at work but display on my local laptop. To connect via ssh, I need to go through 2 servers. A: Laptop wanting to display browser that runs on ...
1
vote
1answer
2k views

ssh using certificates — can you rename id_rsa file?

When using certificate authentication with ssh, the instructions I have found indicate you should create a key-pair as id_rsa.pub && id_rsa. The public key is then sent to the remote system ...
0
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0answers
875 views

OpenSSH Server won't start on Windows 7

I have followed this example to setup an SFTP server on Windows 7. I have done this before on XP and it worked a treat, and the process seemed to go OK on Windows 7 but now I can't get the OpenSSH ...
0
votes
1answer
71 views

How can I set up a “remote pair-coding” environment linux to linux?

I did some research on how to enable a pair-coding environment remotely so someone else on their MacOx/Linux box could view my screen (I code using vim + the rails plugin). I read Evan Light's blog ...
2
votes
3answers
1k views

Can only ssh into Ubuntu 12.04 alpha machine when logged into console

I recently installed the latest Ubuntu 12.04 64bit alpha (2?) onto a VMware virtual machine in order to check things out. One strange thing I've encountered is that I can only successfully ssh into ...
0
votes
2answers
519 views

Small delay while connecting to virtual SSH (residing on the same machine)

I have set up a virtual machine - Debian 6.0.4 - on my Windows 7 host OS. I use VirtualBox as software. Recently I have started to play with ssh but I have noticed that when I login to the virtual ...
4
votes
1answer
2k views

What is a GPG with “authenticate” capability used for?

GnuPG subkeys can be flagged with three kind of capabilities: Sign, Encrypt and Authenticate. While the first two actions are widely used and documented, the authenticate action is somehow ...