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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unable to use ssh-1 despite protocol being 2,1 in sshd_config file

When I do telnet localhost 22 I get SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1 back. Since my sshd_config file has Protocol 2,1 in it (vs Protocol 2) shouldn't I be getting SSH-1.99-OpenSSH-6.6p1 ...
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1answer
42 views

OpenSSH server refuses to accept key authentication unless logged into server locally

My server is running Ubuntu-Server and ahs OpenSSH-Server installed on it. I set up the /etc/ssh/sshd_config file to accept and require rsa keys, it looks for keys in the 'AuthorizedKeys ...
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2answers
2k views

SSH Constantly Hangs at SSH2_MSG_SERVICE_ACCEPT Received

I'm having problems with SSH. I can't connect to anything; every connection hangs indefinitely at SSH2_MSG_SERVICE_ACCEPT RECEIVED. I'm on OSX 10.6.8. I'm thinking that it's a problem with my SSH ...
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0answers
120 views

SSH key verification fails when connecting for first time

I'm trying to connect and it fails to verify key. I have no problems when connecting by PuTTY. $ ssh -v xxx.xxx.xxx.xxx OpenSSH_6.0p1 Debian-4+deb7u2, OpenSSL 1.0.1e 11 Feb 2013 debug1: Reading ...
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1answer
163 views

Accessing mysql behind firewall with ssh port forwarding

I have an architecture which looks like this: | - DMZ - | ________ | ________ | _______ | CLIENT | | | SERVER | | | MYSQL | |________| | |________| | |_______| ...
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2answers
39 views

ssh keeps asking for new password

I want to login to a Linux box with openssh installed. After each login ssh requests me to change my password because it is outdated. How can I prefent this? The server system is created with ...
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0answers
302 views

Unable to SSH into freshly installed debian VM, “Permission denied, please try again.” error

I just set up a Debian 7 VM. I can ping my VM from host OS, which is Ubuntu 14.1, but can not ssh into VM. Here is the output of ssh -v EDIT: I am using virtulbox. I am not using any command line ...
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3answers
7k views

no version information available (required by /usr/bin/ssh)

I am getting no version information available when making ssh. Openssl verion: sat:~# openssl version OpenSSL 1.0.1f 6 Jan 2014 Here is output of ldd /usr/bin/ssh: /usr/bin/ssh: ...
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1answer
2k views

Can't write or download to SFTP on Ubuntu Server 10.04

I'm having a problem setting up SFTP with an Ubuntu Server 10.04 LTS x64. I use openSSH with public key authentication, I can login with SSH perfectly with the keys no problem. I can also connect to ...
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0answers
297 views

Ubuntu 14.04 ssh server hanging when connecting but pings works

I am running an Ubuntu ssh server with login and ChallengeResponseAuthentication enabled. However, the following command outputs this and hangs until timing out: ssh -vvv name@xxx.xx.xxx.xxx ...
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49 views

ssh-agent/ssh-add - how can I force confirmation by default?

I use ssh forwarding alot and I'm concerned about "agent hijacking", so, I like to use -c option when calling ssh-add, which enforces confirmation on every key usage. How can I turn the confirmations ...
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1answer
579 views

SSH authorized_keys and newline

I am trying to configure SSH with public-key authentication on Debian. I can't seem to get it to work because auth.log keeps saying that can't read key type:...(key line)\n. It keeps complaining ...
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0answers
564 views

Launchd not launching ssh-agent after plist edit

I'm trying to reconfigure my ssh-agent to have a timeout via the -t argument. I edited /System/Library/LaunchAgents/org.openbsd.ssh-agent.plist <array> ...
6
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1answer
502 views

How are Ciphers, MACs and Key exchange algorithms negotiated by OpenSSH?

Looking at the man page for sshd_config I see the default list of algorithms for Ciphers, Key Exchange (KEX) and MACs. In my set up, I have selected a subset of these algorithms for use (i.e. I don't ...
3
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1answer
7k views

Why does SSH hang at the end of these commands and how can I make it exit?

I run this: ssh -t -vvv -i ~/.ssh/druid-keypair -o StrictHostKeyChecking=no ubuntu@${INSTANCE_ADDRESS} <<EOI # Setup Oracle Java ... # Install dependencies - mysql must be built from source, ...
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2answers
4k views

1and1 ssh - connection refused

I'm having troubles connecting through SSH to my 1&1 account. When I try to connect with command userXXX@host -p22 -vv I have the following output: OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL ...
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1answer
25 views

Is there such a thing as a universal autorized_keys for 1 ssh_key to work on all accounts on a machine?

I run a webserver so I'm constantly making new accounts for new domains and logging into them over ssh. Is there a way that instead of pasting my id_dsa.pub file into a new authorized_keys file on ...
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0answers
48 views

How to set-up and run Open SSH?

I just installed Open SSH. It's not very friendly towards me I must say. The program files directory contains several .exe files without even a readme file. So far, I didn't even figure out which ...
2
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1answer
170 views

Can I get OpenSSH's sshd to accept a login for a non-existent user?

I'm trying to set up sshd to do some funky things on a dedicated server. (Which is to say, don't worry about why I'm asking such a strange question; I'm just experimenting to see how I can abuse ...
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3answers
294 views

How do I install OpenSSH on Ubuntu 12.10 without apt-get?

I need to use Ubuntu 12.10 and want to install OpenSSH on it. Since this is a deprecated version of Ubuntu I cannot use apt-get to attain the wanted package, so how should I move forth to be able to ...
2
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1answer
232 views

Using homebrew's OpenSSH on OS X with ZSH

I've installed the latest version of OpenSSH on OS X using homebrew. As per the instructions in the formula, I have edited the org.openbsd.ssh-agent.plist file to point to /usr/local/bin/ssh-agent, ...
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1answer
118 views

Trouble Installing SSH with Cygwin

I'm using Cygwin (or more specifically zsh installed via Cygwin) and I've installed all of the ssh packages including Net/openssh, but when I try to run ssh (or things like ssh-host-config) I get: ➜ ...
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1answer
613 views

Use custom SSH authentication mechanism (OpenSSH)

I have a collection of servers (Debian/Ubuntu) for which I need to create a custom ssh authentication mechanism. I found a couple of 'same-ish' examples for reference with Duo and Authy. They are ...
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3answers
20k views

Can't connect with putty to a Linux server

I can't connect with Putty to a Linux box. In the putty log I only get 3 lines and the last line is "Server unexpectedly closed network connection". FTP and ping to the Linux box works. Putty is ...
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3answers
11k views

One user can use SSHFS, other user gets “remote host has disconnected”

I have two users with valid SSH accounts on a server. Both users can login via ssh successfully. When trying to mount SSHFS, usera can mount with no problems, while userb gets the error: remote host ...
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2answers
5k views

Cannot connect to my mac via SSH

I want to open a connection to my mac (10.8) via SSH. An SSH-server is installed by default on OSX. Remote login is enabled, so the service is running and I can connect to to localhost via ssh. ...
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1answer
485 views

Hide ssh version

I did a tcpdump when connecting to my server over ssh. First thing I see is: SSH-2.0-OpenSSH_5.3 Is it possible to make the server not send it's ssh version?
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2answers
437 views

Cannot scp file to an EC2 instance that I can ssh to

I have two EC2 instances that were created from the same AMI, which was created from the Amazon Linux AMI. These are running mysql in a master-slave configuration. The security group ("db") is ...
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1answer
237 views

Howto force ssh to use a specific private key?

With ssh -i <private key filename> you can instruct ssh to use an extra private key to try authentication. The documentation is not clear on how to explicitly use only that key.
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1answer
32 views

What is the public key file that is generated by PuTTY?

If I'm using the PuTTY key generator to create a public/private key pair, there is a button to "Save public key" like so: However OpenSSH doesn't accept the format of this public key file, at least ...
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2answers
213 views

how to speedup ssh-keygen

We are using beaglebone based custom board. In one of the init script we are generating ssh keys but it takes around 7 seconds to generate the ssh-keys. How do we speedup the process of generating ...
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0answers
102 views

ssh_exchange_identification after few attempts

To help find diagnose a ssh issue with a gitlab server, I've written the following script #!/bin/bash while : ; do ssh -v git@example.com || exit 1 done After few successful iterations ...
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1answer
556 views

Use a server as a remote SOCKS proxy using OpenSSH

I want to use a server I have as a SOCKS proxy for browsing from my laptop. According to OpenSSH's man page, you can do that with the opcion -D -D port Specifies a local ``dynamic'' ...
0
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1answer
53 views

SSH communication to go through Tor

I've been trying this more specifically the SSH: Method 3 (socat). At the end of the method it says: If you want every SSH communication to go through Tor, you can even say : Host * ProxyCommand ...
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1answer
352 views

What ProxyCommand to use for ssh host-based authentication relay?

I have a host $HOST which I can (only) access by sshing to a host $BASTION and then, by host-based authentication, connect to with ssh $HOST. $HOST does not accept access by for example public-key ...
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4answers
986 views

Remote SSH to VirtualBox instance

I have an Ubuntu 13.10 instance running on a remote VirtualBox that I need to maintain for someone. I'm trying to figure out how I can SSH into this instance. Ubuntu has OpenSSH installed, but so far ...
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228 views

Android SHH tunneling through school Wi-Fi

Ok so I'll try my best to explain the situation at hand here. My school recently got a new web filter that blocks literally, everything. I can't use Google Drive or anything that I need anymore. Our ...
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0answers
329 views

XCOFF32 object files are not allowed in 64-bit mode while installing Crypt-SSLeay-0.65_02

I am installing a Perl package Crypt-SSLeay-0.65_02 in an AIX 6.1 system but while performing perl Makefile.PL getting the following error. The test suite can attempt to connect to public servers to ...
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1answer
162 views

Prevent multiple ssh-tunnel to same port and ip

Im creating a few ssh-tunnel connections to a remote system with this command: ssh -R port:localhost:2222 user@ip If this command is now execute multiple times, it will create every time a new ...
1
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1answer
743 views

make command for installing OpenSSH on Ubuntu

I am currently trying to compile OpenSSH on Ubuntu. I am following the steps below which I got from the openssh website; (ref: http://www.openssh.com/openbsd.html) OpenSSH 6.2: March 22, 2013 ...
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1answer
221 views

GIT via OpenSSH in Powershell is fine, so why can't I connect in plain cmd console?

when I run ssh user@servername01 ...under powershell it connects without a problem, however when I run the same command under a standard cmd prompt I am prompted for a password (no password is set ...
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1answer
2k views

How to restrict SSH root login, but allow some exceptions

in openssh, you can restrict root login (PermitRootLogin no) but can it have an exception?
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2answers
1k views

OS X, SSH: use different private key files for different servers

I want to use different private key files to connect to different SSH servers (ssh://git-server:port/repository). How to manage that? SSH seems to assume the private key file in ~/.ssh/id_rsa.
2
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1answer
4k views

How do I specify the key exchange method in OpenSSH?

I'm trying to understand how OpenSSH decides what key exchange method to use. What I don't see is how to specify the method. In addition, I know every ssh server/client is required to support at least ...
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1answer
171 views

Forcing ssh connection to use rsa key authentication (no root)

Is there anyway as a standard user to be able to force all login attempts to my account to use rsaauthentication? I have a school linux login but obviously I don't have root access or sudo access, is ...
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3answers
256 views

Reach computer behind a NAT or Proxy

I have a home PC connected through twoway satellite modem. I cant reach from outside, so after a some research I found a solution which is reverse ssh tunneling. but I have a few question regarding ...
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0answers
138 views

Linux to Windows (OpenSSH) directory bindings

I've got OpenSSH working on a windows machine and have been able to successfully connect from Linux to Windows and vice-versa. I need to know how Linux paths are linked to windows while using scp. ...
1
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1answer
263 views

Mass creating users who can login via ssh keys but not with a password

I am trying to mass creating users that can login via ssh private/public keys but which can not login with users (kind of like using newusers but I want to make sure users will not be able to login ...
0
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1answer
211 views

After I switch default SSH ports, why does NMAP display port service as “down”

Running Ubuntu 13.04, I edit sshd_config to change Port 22 to Port 2022 When I reload my sshd service and nmap the server from my local machine, I get this: PORT STATE SERVICE 2022/tcp open ...
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3answers
156 views

Chroot sftp jail seems to be insistent on not working

So I followed this guide to the letter: http://markshust.com/2013/04/01/how-setup-chrootd-sftp-account-linux and a few other guides as well, but I seem to be incapable of getting a connection. I am ...