How to add authentication to ssh dynamic port forwarding?

Posted by Aalex Gabi on Server Fault See other posts from Server Fault or by Aalex Gabi
Published on 2012-10-14T00:32:53Z Indexed on 2012/10/14 3:39 UTC
Read the original article Hit count: 620

Filed under:

ssh

|

authentication

|

encryption

|

ssh-tunnel

|

socks

I am using ssh as a SOCKS server by running this command on the server:

ssh -f2qTnND *:1080 root@localhost

There is one problem: anybody can connect to the server and use it's internet connection.

Options:

To use iptables to filter access to the server, but I connect to the server from various non-statically allocated IP addresses so I would have to edit very frequently those filters which can be annoying.
To install a SOCKS server on the remote. Ultimately this is the last option if there is no other simpler way to do it. (I am very lazy)
Launching the same command on clients machines. The problem here is that some clients don't run on Linux and it is awkward to set up the tunnel (Windows + Putty).

Is there a way to add authentication to a SOCKS server made using ssh?

Bonus question: How to add encryption between the client and the server (made using ssh)?

© Server Fault or respective owner

Related posts about ssh

Problem with hadoop start-dfs.sh

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I installed and configured hadoop on my Ubuntu 14.04 server, virtualized inside of hyper-v, however I am getting an issue when i run start-dfs.sh root@sUbuntu01:/var/log# start-dfs.sh 14/06/04 15:27:08 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java… >>> More
SSH problems (ssh_exchange_identification: read: Connection reset by peer)

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I was running 11.10 and decided to do the full upgrade and come up to 12.04 after the update SSH (not SSHD) is now misbehaving when attempting to connect to other OpenSSH instances. I say OpenSSH as I am running a DropBear sshd on my router and I am able to connect to it. When attempting to connect… >>> More
SSH main process ended

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a running ubuntu server 10.04.1. When I tried to login to the server via ssh, I could not. Instead, I got connection refused error. I tried to ping the machine and I got reply! So, the clear reason is that SSH daemon is stopped. After reboot, I was able to login to my server via ssh. After… >>> More
SSH server not working (respawns until stopped)

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a running Ubuntu Server 10.04.1. When I tried to login to the server via ssh, I could not. Instead, I got connection refused error. I tried to ping the machine and I got reply! So, the clear reason is that SSH daemon is stopped. After reboot, I was able to login to my server via ssh. After… >>> More
Cannot SSH after resetting firewall on VPS

as seen on Server Fault - Search for 'Server Fault'
I'm having trouble trying to SSH to my Debian 5 VPS with blacknight. It was working fine until I did the following: Logged into 'Parallels Infrastructure Manager' - Container - Firewall - Set to 'Normal Firewall settings'. It told me there was an error with the IPTables and offered the option again… >>> More

Related posts about authentication

Configuring Fed Authentication Methods in OIF / IdP

as seen on Oracle Blogs - Search for 'Oracle Blogs'
In this article, I will provide examples on how to configure OIF/IdP to map OAM Authentication Schemes to Federation Authentication Methods, based on the concepts introduced in my previous entry. I will show examples for the three protocols supported by OIF: SAML 2.0 SSO SAML… >>> More
windows authentication vs sql server authentication for asp.net forms authentication site

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a database and a site having forms authentication. It is working fine with VS2008. This time, I am using "Trusted_connection =True". But when it is opened from outside or directly from browser then I am getting error "Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'." I know this is due… >>> More
Disable authentication on subfolder(s) of an ASP.NET app using windows authentication

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, Is it possible to disable windows authentication on one or more subfolders of an ASP.net application using windows authentication? >>> More
AutoCompleteExtender - authentication failure (forms authentication)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using the AutoCompleteExtender from the AJAX control toolkit on my aspx page - I have it wired up to a WCF service that is returning a string array and everything works happily. If I change my service definition to include a demand for the caller to be authenticated, like so: <OperationContract()… >>> More
Ruby on Rails , functionalities having twitter authentication and email authentication (autlogic and

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Experts, I would like to ask your guidance on how to authenticate using email add/ the basic log-in while having also a twitter log-in, twitter authentication works fine but if having an alternative log-in like using basic sign-up and email log-in part wont work.... any ideas please...? >>> More