Question

HowTo SSH Site to Site Tunneling

Asked by: EHart7

I can't seem to get a ssh point to point tunnel setup to save my life, can someone explain to me how to get this working?
* I have a SSH Server/Client both Linux that I can connect to across the internet.
* I don't have any tunnel devices in my ifconfig on either computer.
* I have 2 private networks, and we'll use fake real world IP's for examples sake.
* Private network 1 is 192.168.1.0/24 with an example public IP of 1.1.1.1
* Private network 1 is 192.168.11.0/24 with an example public IP of 11.11.11.11

Question part1: How do I make the 2 networks talk via a computer on each end (similar to how a site2site VPN Tunnel would function)
Question part2: Sometimes I might not want everyone on the source side to be able to access the remote network through my local machine so, How can I connect 192.168.11.100 to 192.168.1.0/24?

Thanks

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2009-10-16 at 11:31:09ID24818999
Tags

OpenSSH Site To Site Point to Point Tunneling VPN

Topics

Virtual Private Networking (VPN)

,

Linux Networking

,

SSH / Telnet Software

Participating Experts
3
Points
500
Comments
9

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. VPN, or tunneling with SSH
    Dear Members, i want to have a secure connection from one LAN to another LAN. In front of both LANS are Linux Firewalls. I need a connection behind LANa, the office side and LANb which has UNIX-Boxes behind. I want to have a secure Connection from the Office(LANa) for Telnet...
  2. VPN or SSH Tunnel for routing traffic
    I'm currently using an SSH tunnel to connect to a Squid HTTP proxy running on a remote machine. I've configured my browser to use the ssh tunnel/proxy except while connecting to addresses on the local network. I'd like to make this more robust and tunnel all my traffic throu...
  3. is ssh server a tunnel server?
    HI, i'm a bit confuse on ssh and tunnel server, are they the same if not where an i find more information on the tunnel server? where can i download a free version on tunnel server to play around? regards
  4. SSH tunnelling outgoing routes
    I have a linux server with 3 public IPs, and I use SSH tunnelling to connect to each of them. Let's call them: 1.1.1.1 (venet0:0) , 1.1.1.2 (venet0:1) , 1.1.1.3 (venet0:2). When I tunnel using 1.1.1.1, outgoing IP for the public is: 1.1.1.1. But when I tunnel using 1.1.1.2 ...

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: ravenplPosted on 2009-10-17 at 00:23:29ID: 25595103

You cannot create site to site tunnel with just ssh.
You can use ssh as transport for site to site tunnel - still You need admin rights on both sides to alter the routing table and setup tunnel interfaces.

I would advise easier way with openvpn setup.

 

by: rsivanandanPosted on 2009-10-17 at 00:50:06ID: 25595171

What connects to internet on both sides?

Cheers,
rsivanandan

 

by: nociPosted on 2009-10-17 at 13:56:11ID: 25597477

SSH cannot be used for site to site tunneling, SSH can forward traffic for one or more ports (per connection) to another system or back.
SSL can be used as also a UDP based variant used by OpenVPN. The other method is IPSEC tunneling.

Checkout the f.e. openssh -X -L -R options.

 

by: EHart7Posted on 2009-10-18 at 22:50:51ID: 25602818

ravenpl:
* I have root access on both sides
* I'm looking for a solution that works via an open ssh port. (aka not openvpn, IPsec, etc)

rsivanandan:
* I'm asking as a generic question. For discussion sakes lets say a simple NAT router with the SSH port forwarded to a machine on the inside.


noci:
I'm specifically trying to get clarification on how to use the ssh -w switch.

man ssh describes it as the following

     -w local_tun[:remote_tun]
             Requests tunnel device forwarding with the specified tun(4) devices between the client (local_tun) and the
             server (remote_tun).
 
             The devices may be specified by numerical ID or the keyword any, which uses the next available tunnel device.
             If remote_tun is not specified, it defaults to any.  See also the Tunnel and TunnelDevice directives in
             ssh_config(5).  If the Tunnel directive is unset, it is set to the default tunnel mode, which is
             point-to-point.
                                              
1:
2:
3:
4:
5:
6:
7:
8:

Select allOpen in new window

 

by: ravenplPosted on 2009-10-18 at 23:44:04ID: 25602971

If You have root and willing to create routed tunnel, therefore refer http://bodhizazen.net/Tutorials/VPN-Over-SSH/

 

by: nociPosted on 2009-10-19 at 03:56:19ID: 25604054

Learned somthing today... (I do like IPsec personaly, but can understand other forms can be used too). Tunnels using TCP might misbehave near w.r.t. to expectations from f.e. UDP or SCTP timing etc.).

This is from the OpenSSH (On openBSD) documentation:   http://www.kernel-panic.it/openbsd/vpn/vpn5.html

Also keep in mind that a tun interface can be opened once, so you might need multiple tun interfaces on the server.

ravenpl's setup it probably better suited for supporting that just add more channel="N" commands & network confirations for those.
Probably needs to use -w 0:any for that too. (I'm going to experiment with this.)

 

by: EHart7Posted on 2009-11-04 at 11:05:47ID: 25742680

None of these solutions use the -w option like I need though.  I found this walk through which is pretty good: http://www.gentoo-wiki.info/HOWTO_VPN_over_SSH_and_tun

But How do I know what tunnel device/numbers to use. How do you create/del tun# interface devices?

Thanks

 

by: nociPosted on 2009-11-04 at 16:36:45ID: 25745738

The localnumber you can create as you which, you could leave the remote one out..?
The other side needs to have the tun driver loaded though.

The -w {local} will create any local tunnel you need
Leaving out the :{remote} will create a new interface on remote (next free number).
But then you won't know the interface it uses... (at the remote site)
There is no environment variable for it.

So you need to allocate them up front., every tunnels needs it's private number.
and you need to administer them.

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...