Can't tunnel firefox through SSH tunnel

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I read the many tutorials on how to tunnel traffic via putty and configure Firefox to access web via that tunnel (Windows desktop). The steps are simple: (A) set connection with dynamic ssh-tunnel at port, say 1010. (B) configure Firefox to use Socks5 at localhost:1010.

This solution used to work for me in the past, but for some reason does not work anymore. I get a page saying "The connection was reset... Try again"

To diagnose the problem, I downloaded curl utility for windows and then run this from command line: curl -socks5 localhost:1010 www.google.com

It returned a valid HTML code of that page. So the problem is not at the putty side, but rather something in FF.

I also tried the solution proposed in here using chrome and didn't manage to get it work.

Does anyone has idea how to solve this out ?

EDIT: relevant screenshots stored here

Thanks,

-Moshe

Moshe

Posted 2017-03-21T19:19:04.070

Reputation: 31

how did you set it up? Post a screenshot or something. It is impossible to answer if we don't know what you set up. – Jakuje – 2017-03-21T20:16:32.320

Did you try unchecking "Proxy DNS when using socks5" on ff ? – Pedro Lobito – 2017-03-22T23:47:08.367

Tried that as well. no success. This is quite weird since the curl test proves that the tunnel is set up correctly and can bring in web pages. So, this is something in the FF/Chrome app layer that prevents it from using the tunnel correctly. – Moshe – 2017-03-24T12:48:12.380

Can someone guide me how to debug this problem using wireshark? What should I be looking for in the messages going in and out the tunnel ? – Moshe – 2017-03-31T08:48:18.683

Answers

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Your Socks proxy seems to work fine (PuTTY configuration equals ssh -D 1010 and your curl test also succeed). Your browser configuration (SOCKSv5 to localhost:1010) seems ok, too.

If you are using some kind of virus protection that might be interfering with the browsers connections, try

  • disabling virus protection plugins from Firefox
  • using high source ports (1024 < x < 65536) instead of low port 1010

Esa Jokinen

Posted 2017-03-21T19:19:04.070

Reputation: 615

I tried with port number 8787 and receives the same behavior. Firefox has no add-ons/plugings. I simply downloaded latest version from web.

I also tried to disable windows firewall and so success. – Moshe – 2017-03-22T11:10:44.460

Any idea how can I debug what is wrong in my setup ? I have no clue of what went wrong... – Moshe – 2017-03-23T10:17:59.907

Asked: 2017-03-21T19:19:04.070

Viewed: 943 times

Active: 2017-03-22T09:51:12.200