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Author Topic: Virtual Server setting causes instability  (Read 12554 times)

shaith

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Virtual Server setting causes instability
« on: December 02, 2008, 10:55:29 AM »

To reproduce:

1.21 firmware

Go to Advanced, Virtual Server

Set up a virtual server on the first checkbox.  Doesn't matter what, I used Remote Desktop.

SKIP the next line so that it isn't enabled

On the 3rd checkbox, set up another virtual server

Save settings

Router will begin randomly restarting.

Clear checkmark in 3rd box and save settings, router becomes stable once more.
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arod

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Re: Virtual Server setting causes instability
« Reply #1 on: December 02, 2008, 01:41:52 PM »

shaith,

What are you entering in the fields after you check the box? A screen shot would be nice..  ;)
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shaith

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Re: Virtual Server setting causes instability
« Reply #2 on: December 07, 2008, 10:57:07 AM »

Doesn't seem to matter what ports, settings, etc.

Using valid ports vs invalid ports, following IANA spec or ignoring it, seems to happen regardless - if you skip a line, it happens.



« Last Edit: December 07, 2008, 10:59:59 AM by shaith »
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mayo1024

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Re: Virtual Server setting causes instability
« Reply #3 on: February 01, 2009, 10:18:34 AM »

I get the same issue. With only two entries in Virtual Servers it is stable, but as soon as I enter a third I get random disconnects. I've since downloaded the beta 1.21 firmware and the disconnects are far and few in between but still happen.
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EddieZ

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Re: Virtual Server setting causes instability
« Reply #4 on: February 01, 2009, 10:59:58 AM »

Hmmm, haven't been able to reproduce. Entering a new Virtual Server does not require a reboot in my case. Seems to work after saving.


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ttmcmurry

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Re: Virtual Server setting causes instability
« Reply #5 on: February 01, 2009, 08:37:57 PM »

There are two things I see that are worth noting.

MS-RDP is a stateful protocol meaning it has to use TCP.  Selecting "both" isn't the way to go with RDP.

Also, if you're simply forwarding 3389 to only one IP address (meaning there's only one system you want to use RDP with), then why are you using virtual server?  Use port forwarding instead and save virtual server for something else where you're changing the public-facing port to map back to a different private port.

EDIT:  EddieZ, I tested Port Forwarding 3389 to one of my laptops without issue.  Also tested Virtual Server with two different external ports to 3389 on two internal laptops and a 3rd rule for FTP.  No issue here yet, either.
« Last Edit: February 02, 2009, 06:41:32 PM by ttmcmurry »
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EddieZ

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Re: Virtual Server setting causes instability
« Reply #6 on: February 02, 2009, 07:11:25 AM »

Some people claim that port forwarding is not working correctly. I do not share that experience, all works fine overhere, but that might be the issue.

Since RDP uses only one port this should work just as good as Virtual server. Will try some setting tonight!
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wonderiuy

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Re: Virtual Server setting causes instability
« Reply #7 on: February 03, 2009, 06:25:50 AM »

I experienced the same behavior.
Specifically I redirected port 3389 to port 80 of my IP-Cam and since that i got random disconnection from router. Using 1.11
« Last Edit: February 04, 2009, 12:54:31 AM by wonderiuy »
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EddieZ

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Re: Virtual Server setting causes instability
« Reply #8 on: February 03, 2009, 07:26:44 AM »

Some people claim that port forwarding is not working correctly. I do not share that experience, all works fine overhere, but that might be the issue.

Since RDP uses only one port this should work just as good as Virtual server. Will try some setting tonight!


Tried a lot of different settings, but cannot get it disconnect...
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shaith

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Re: Virtual Server setting causes instability
« Reply #9 on: March 01, 2009, 02:36:30 PM »

Just to clarify, since there seems to be a tidbit of confusion here:

I'm aware that RDP is stateful - as I recall all I did was hit the drop-down and choose remote desktop and allowed the router to auto-fill.  Lazy > aware. :)

However, whether it uses TCP only (as it does) or uses both TCP/UDP, or even if this were an entirely different protocol which ran UDP, the "both" option should work.  The issue wasn't actually whether the port forward worked - I could verify that RDP was indeed active through the firewall to the desired machine.  The issue was that it caused random restarts. and it actually did so based on which lines in the form were filled rather than protocol.  I was able to produce this with RDP, FTP, SSH, and several other valid ports plugged in several ways. 

So why the interest in this particular bug in the first place?  Well, not every virtual would necessarily be something you'd want up all the time.  Perhaps you have a service here or there that you only want up when you're home.  Perhaps you have something configured which eats your upstream and you're about to go jump into your favorite FPS with all the aimbotters and LPB's.  Or maybe you set up a virtual as a back door while you're at work and you don't want it or need it online during the weekends when you're home.  It'd be nice to be able to just uncheck, hit save, and move on.  But this particular bug would make that a tad difficult, and nearly impossible to fix from remote.

I have not tried upgrading to the latest betas since this post, so I have no idea whether this is something that's been corrected, something they were able to reproduce successfully in the lab or not, etc.

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Lycan

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Re: Virtual Server setting causes instability
« Reply #10 on: March 03, 2009, 09:44:41 AM »

Whats the H/W: Version of the people seeing the restarts?
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lotacus

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Re: Virtual Server setting causes instability
« Reply #11 on: March 03, 2009, 03:21:51 PM »

Can't reproduce it on mine, HW:A2 w/ firmware 1.22 not gonna downgrade cuz i've played enough with the gateway today.
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EddieZ

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Re: Virtual Server setting causes instability
« Reply #12 on: March 03, 2009, 03:27:30 PM »

IN addition to earlier reply: A2, 1.22beta
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DIR-655 H/W: A2 FW: 1.33

Lycan

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Re: Virtual Server setting causes instability
« Reply #13 on: March 04, 2009, 10:03:18 AM »

Screwy. I'd like to know more about the networks behind the the units that are failing.
Please provide as much detail as possible.

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ttmcmurry

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Re: Virtual Server setting causes instability
« Reply #14 on: March 08, 2009, 01:04:21 PM »

Mine's working: HW A2 f/w 1.22
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