Recommended Posts

As of recently it has been discovered that most routers expose UPnP to the outside world, which is not good at all. This allows attackers "from the internet" to open ports in your routers.

It is recommended you DISABLE UPnP in your router. Below is a test to see if your router is vulnerable. Steve Gibson, the creator of the very popular "Shields-up" which scans your IP for open ports in your router has recently added a test for the upnp vulnerability. Simply click the link then click the "proceed" button. You will then see a button for the UPnP test. Good luck!

The Test

https://www.grc.com/x/ne.dll?bh0bkyd2

  On 03/02/2013 at 18:08, warwagon said:

It is recommended you DISABLE UPnP in your router.

No; It is recommened that you get a good router. I have UPnP on my router enabled and

  Quote

THE EQUIPMENT AT THE TARGET IP ADDRESS

DID NOT RESPOND TO OUR UPnP PROBES!

So either I have a good router or the test sucks.

  On 03/02/2013 at 18:20, Detection said:

I have uPnP enabled but still fine (Expected as much with DD-WRT though)

Capture.PNG

Correct this is a route test, not a computer test.

It's only recommended to disable UPnP on your routers if they don't pass that test, which means they are exposing you to the outer world.

Just passed the test on three touters with UPnP enabled. Two of them are running DD-WRT.

post-203976-0-34939600-1359915937.png

I disable it anyway. The fact that UPnP, by design, lets any application communicate with the router and open ports should make any security conscious user uneasy.

THE EQUIPMENT AT THE TARGET IP ADDRESS

DID NOT RESPOND TO OUR UPnP PROBES!

Why would you disable uPnP anyways? It allows internal hosts to dynamically open ports like XBL or PSN for gaming and voice. Without it you'd have to manually open every single port those services and similar ones use. Just keep your internal hosts clean.

  On 04/02/2013 at 08:12, trek said:

THE EQUIPMENT AT THE TARGET IP ADDRESS

DID NOT RESPOND TO OUR UPnP PROBES!

Why would you disable uPnP anyways? It allows internal hosts to dynamically open ports like XBL or PSN for gaming and voice. Without it you'd have to manually open every single port those services and similar ones use. Just keep your internal hosts clean.

Yeah I agree with keeping uPnP enabled also.

I ran many different servers over the years, long time ago now, so I had many ports opened for access, and that site's port tests always showed me as being safe and secure.

All depends on what type of security you're running on your computers.

There should be no issue with running UPnP/NAT-PMP on your router if it's properly configured, I knew mine would pass this test from the start since it exposes it's configuration in a good manner (It only allows hosts on the 192.168/16 subnet to create a forwarding rule, and said rule has to point at the host that requested it, otherwise it's rejected), and shows what ports are forwarded on what protocol.

Never mind the fact that the firewall should reject outside communication before it even gets to the UPnP/NAT-PMP daemon anyway, if it isn't being blocked you have bigger issues.

"Without it you'd have to manually open every single port those services and similar ones use."

So -- your talking a handful of ports at most.. UPnP is to allow unsolicted inbound traffic to get through your nat router. Traffic initiated by you, or in answer to your traffic is allowed.

Most people have no use of UPnP, it has been a nightmare since it was created -- who in their right mind thought, hey lets allow ports to be opened on your gateway/firewall without any sort of auth at all!!

And no UPnP should not be reachable via your public IP that is for damn sure.

  On 03/02/2013 at 18:32, warwagon said:

I disable it anyway. The fact that UPnP, by design, lets any application communicate with the router and open ports should make any security conscious user uneasy.

If you trust what's in your network and have the routers firewall up I don't see how it could.

^ the point is UPnP can remove your firewall settings. Without even a nod to you that its doing so, nor any sort of auth method to allow it.

There really needs to be some form of notification and auth to the mechanism - and then sure it would be a valid tool in opening firewall ports for the masses.

  On 04/02/2013 at 08:12, trek said:

THE EQUIPMENT AT THE TARGET IP ADDRESS

DID NOT RESPOND TO OUR UPnP PROBES!

Why would you disable uPnP anyways? It allows internal hosts to dynamically open ports like XBL or PSN for gaming and voice. Without it you'd have to manually open every single port those services and similar ones use. Just keep your internal hosts clean.

It would allow any malicious program to actively contact your router, open whatever ports it wants, and then transmit data through those ports all without your knowledge.... pretty big security hole if you ask me.

  On 04/02/2013 at 14:14, BeLGaRaTh said:

Steve Gibson, the person who creates the most FUD on the internet with his crazy rants and observations!!!

I'm not going to argue that the fact that he is crazy, which he probably is, but he is also very smart. And Facts do not = FUD.

Are you up to date on this UPnP issue? The typical way UPnP works is, an active program on one of the systems on your network will contact the router and open ports for whatever program/service to pass data through. Sounds ok right, well there is an exploit on a TON of routers that allows that request to be made from the OUTSIDE over the WAN, so if you have one of these affected routers, anyone outside your network, can open up ports into your network using a little bit of packet "magic". It's a pretty big deal.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Assuming you want the better GPU for gaming put the money into the GPU, the difference between the CPUs is negligible unless you're doing video encoding or similar. A 5700x3d/5800x3d would likely be a better CPU upgrade if you do decide to go that route. Have you tried running the RAM at 3200 or 3000 or bumping the voltage up a bit? It's unlikely to be "faulty" and more likely to just be an incompatibility with your motherboard or CPU memory controller. Having recently upgraded from a very similar system, that CPU is well balanced with a 3080 GPU, you might be able to pick up a decent secondhand one in your budget.
    • NAPS2 (Not Another PDF Scanner 2) 8.2.0 by Razvan Serea NAPS2 is a document scanning application with a focus on simplicity and ease of use. Scan your documents from WIA- and TWAIN-compatible scanners, organize the pages as you like, and save them as PDF, TIFF, JPEG, PNG, and other file formats. NAPS2 creates fully text searchable PDF files that can be imported and indexed within your document management system. NAPS2 is currently available in 40 different languages. NAPS2 key features: Scan documents using WIA- and TWAIN-compatible scanners Scan as many pages as you like from glass or ADF, including duplex support Rotate, flip, remove, and rearrange scanned pages Save as PDF, TIFF, JPEG, PNG, or other file formats Directly email PDFs Search through text included in your PDFs by using optical character recognition (OCR), in any of over 100 languages. Configure brightness, contrast, resolution, and other scan options Save your configurations as profiles to be easily reused later Optional command-line interface (CLI) for automation and scripting MSI installer and application-level configuration available for group policy (GPO) deployment Portable/standalone archives available Translations: English, Català, Čeština, Dansk, Deutsch, Español, Français, Hrvatski, Italiano, Magyar, Nederlands, Polski, Portugues, Russian, Ukrainian, Hebrew NAPS2 8.2.0 changelog: NAPS2 is now available on the Microsoft Store. It costs a small fee to support the developer and provide automatic updates. NAPS2 will continue to be freely available at www.naps2.com Added "Edit with" under the "Image" menu for using an external image editor Added "Share even when NAPS2 is closed" option for Scanner Sharing This will show a system tray icon and restart on login Imported file names are now used as the default file name when saving The "Apply to all selected" checkbox now stays checked Escl: Increased maximum time searching for devices from 5s to 60s Escl: Scanner IPs are now cached for faster and more reliable scanning Windows: Added an arm64 installer Windows: Replaced the "No friendly name" device name from some drivers with "Unknown Scanner" Mac: Fixed an issue where saved files didn't always have the right extension Mac: Disabled the "Apple Mail" email provider when not the default email reader Mac: Updated icons for Split/Combine Linux: Fixed issues with the Save dialog Download: NAPS2 (64-bit) | 43.5 MB (Open Source) Download: Portable NAPS2 8.2.0 | 61.9 MB Link: NAPS2 Home Page | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • I still remember a prediction that in the future, the BIOS will have all the necessary drivers... for any OS. Still not there
    • No mandatory.... Once again the one-way approach (only incentives or only detractors, or as they say 'the carrot or the stick') has proven ineffective.
  • Recent Achievements

    • Week One Done
      Al_ earned a badge
      Week One Done
    • Week One Done
      MadMung0 earned a badge
      Week One Done
    • Reacting Well
      BlakeBringer earned a badge
      Reacting Well
    • Reacting Well
      Lazy_Placeholder earned a badge
      Reacting Well
    • Dedicated
      Epaminombas earned a badge
      Dedicated
  • Popular Contributors

    1. 1
      +primortal
      477
    2. 2
      +FloatingFatMan
      274
    3. 3
      ATLien_0
      243
    4. 4
      snowy owl
      210
    5. 5
      Edouard
      182
  • Tell a friend

    Love Neowin? Tell a friend!