Tagged Questions

Questions about the OpenSSH implementation of the ssh protocol.

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2
votes
1answer
169 views

Wrapping socket connections

I'd like to wrap an insecure connection (this one: http://culturedcode.com/things/) with a secure tunnel, a bit like http://en.wikipedia.org/wiki/Stunnel does, just using UNIX tools. What's the best ...
7
votes
3answers
14k views

ssh, start a specific shell, and run a command on the remote machine?

I am in a situation where several users are sharing the same user account on a remote machine. I have a "personal" directory where I wrote my own .zshrc file, and I would like to have a way to: ...
3
votes
1answer
5k views

Can ping but can't do ssh

I am able to ping my friend but not able to do ssh. Why so? He is using a modem. I thought there might be some firewall enabled. I told him to type #iptables -F He did that, but still I am not able ...
0
votes
1answer
398 views

Does OpenSSH_5.9p1 support Chrooted SSH?

Lately i upgraded my SSH server with OpenSSH_5.9p1 and tried to setup chrooted SFTP/SSH. So far i managed to setup chrooted access only for SFTP using new feature of openssh5.9p1: Match User ...
6
votes
4answers
357 views

SSH “sleeping” for a long time before connect? [duplicate]

Possible Duplicate: How to speed my too-slow ssh login? I have a very strange issue with my SSH server. Whenever I attempt to connect, it literally waits about 30 seconds to a minute before ...
4
votes
1answer
873 views

Use different authentication methods for OpenSSH server depending on client IP

I'm sure this has been answered before, but I could not locate the answer with Google, and this search. I currently only allow shared key authentication for openssh server on my box. However, I ...
6
votes
1answer
1k views

All about ssh ProxyCommand

I am looking for an in-depth explanation of the following ProxyCommand, down to the nuts and bolts of its operation, please. Can you kindly completely dissect it for me and improve on it if you can? ...
3
votes
5answers
11k views

ssh server: reasons for sudden “Connection closed by remote host”

One of my ec2 servers has stopped receiving ssh connections. The OS is Ubuntu server 8.04, and the ssh server is the standard openssh-server. After months of uptime, I tried to connet to it today, ...
4
votes
3answers
679 views

Is there a way to run an ssh server on an Android device?

I'm looking to install Debian over my Android installation so as to be able to use openssh-server, as it's so much better than Dropbear. Is there an easy way to do this, or just to simply install ...
5
votes
2answers
4k views

Multiple 'Host *' in ssh_config?

My understanding of the way ~/.ssh/config works is that each 'Host ' line takes effect for any host matching after that point in the config file. I have a number of personal servers and work servers ...
0
votes
1answer
671 views

github ssh problem- permission denied(publickey)

I tried setting up git as shown in Github's help page, on Arch linux but there seems to be some problem with the SSH keys. It gives this error- Permission denied (publickey). This problem is ...
6
votes
2answers
1k views

Should I be backing up my SSH host keys?

In my automated backups, I'm not sure if I should be doing this. If the hard drive fails or if I wipe the hard disk and start over, what will be the effect of starting with a new SSH host key to my ...
3
votes
2answers
3k views

SSH slow at starting session

Starting an Interactive shell over SSH is slow to one of my servers. Everything leading up to it including negotiating encryption is fast, but then it hangs for 45 seconds. After that, it finishes ...
22
votes
3answers
19k views

Restricting an SSH/SCP/SFTP user to a directory

Is there a simple way to restrict an SCP/SFTP user to a directory? All methods that I've come across require me to set a chroot jail up by copying binaries, but I don't think that should be necessary. ...
4
votes
1answer
151 views

I can't ssh on localhost at a certain port on os x

Here are basics information: $ which ssh /opt/local/bin/ssh It's like that because I'm using MacPorts and it did install there. I did the sudo port load openssh When doing a netstat -an | grep ...
2
votes
2answers
3k views

making ssh hosts global to all the users on the computer

So SSH has these files that configure settings for a specific user. ~/.ssh/authorized_keys ~/.ssh/config ~/.ssh/id_rsa ~/.ssh/id_rsa.pub ~/.ssh/known_hosts I'd like to globalise some of these ...
11
votes
4answers
5k views

Given keys in ~/.ssh/authorized_keys format, can you determine key strength easily?

~/.ssh/authorized_keys[2] contains the list of public keys. Unfortunately, each public key does not specify the key strength ( number of bits ). Is there a utility that can process this file line by ...