DD-WRT UPNP Question

Linksys Wrt54gl wireless router
November 21, 2010 at 21:49:34
Specs: Linux i686, AMD Ahtlon Dual Core
Hello all, thank you for your time. I had a couple of strange things happen to me recently on my desktop computer and I think it is all related to UPNP, VNC, and my router running DDWRT. I have a Linksys WRT54GL router with new version of DDWRT on it. I run Ubuntu Linux on my desktop computer. Recently, I came back to my computer and noticed that a bot designed to scan for open/easily crackable VNC machines had gained access to my system, tried to open up a FTP link, download a file, run the file, and delete it. The text ran in a AIM chat window and it was an .exe so no damage was done to Linux obviously. However, doing some further research on it, I noticed that in fact my system had been wide open with VNC, no password.

I did have remote desktop installed, but had password protected a while ago. Since then, I have upgraded Ubuntu to 10.10 and more than likely there was an update in the remote desktop software as well. This may have caused it to "automatically detect network settings" which then uses UPNP to open ports in the router. I went into my router, no port forwarding, but under NAT->UPNP the service was enabled and there were UPNP forwards for VNC to my desktop system. I understand what happened mostly, but from everything i've seen DDWRT has UPNP disabled by default and I don't recall turning it on at any point.

Do any of you know if UPNP is disabled or enabled by default?


See More: DD-WRT UPNP Question

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#1
November 22, 2010 at 05:36:29
Hello all, thank you for your time. I had a couple of strange things happen to me recently on my desktop computer and I think it is all related to UPNP, VNC, and my router running DDWRT.

Then you've come to the exact right place. We're the folks to manufacture and support DDWRT

NOTE: The above response is sarcasm.

The hint, if you care to take it is, contact the people make and support DDWRT, we don't.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#2
November 22, 2010 at 06:55:08
Understandable, but this is a router/networking question as well. I have always had some great help from this website and have helped some others as well, so I figured I would give it a try.

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#3
November 22, 2010 at 06:56:27
I have already answered my own question anyway, I set the router back to default settings and found that UPNP was not enabled. The question now is how did UPNP get enabled when I am nearly %100 sure I never turned it on since flashing the router.

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Related Solutions

#4
November 22, 2010 at 07:39:58
Understandable, but this is a router/networking question as well.

No, it's a question specificallly about the UPNP setting in the DDWRT firmware you installed on the router.

Here's your question in case you forgot what you actually asked, "Do any of you know if UPNP is disabled or enabled by default?"

If UPNP is not enabled by default on DDWRT, someone would have had to enable it.

If you're not sure if UPNP is enabled by default, save a copy of your present configuration and reset the router to factory defaults and look (or write the DDWRT people and ask them).


It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#5
November 22, 2010 at 10:36:10
My intention was never to just come on here and ask a simple question. I was able to find the answer myself, but part of the reason I started the post/question was to start a conversation or maybe see if someone else had a similar experience,that's it.

With the information we have available to us, finding answers to anything is very easy, but conversations are sometimes hard to come by, at least in my situation.


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#6
November 22, 2010 at 11:59:11
That's all find and dandy but you're not taking into consideration that there is no "DDWRT" forum on this site.

Nor does there need to be one. I'd bet if I searched, I could find some discussion sites, or even a forum or two, dedicated to DDWRT.

Myself, I prefer Tomato firmware to DDWRT. Had you been using it (Tomato) I could have told you whether or not UPNP was enabeld by default. However, I don't use, and never have used, DDWRT. As far as I know, nobody else who hangs out in this networking forum (I stressed that because this forum's intent is to help with actual networking problems. Your software issue is not a "networking" issue and therefore doesn't even belong in here to begin with) uses DDWRT either so your attempt to start a conversation about it was moot.

In a nutshell, it's nice that you think it valuable to open a discussion in the wrong place about a piece of software very few people use....but it wasn't necessary, or really wanted. Go to a DDWRT forum (if there is one) and start your conversation there. Very few people (in the 10+ years I've been hanging out here in CN) come in here looking for answers to questions and UPNP in DDWRT.

Typically, people come into the networking forum here on CN looking for help with networking issues.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#7
November 22, 2010 at 12:19:49
OK, wonderful I get the point. It seems although you are unfamiliar with this software, you feel obligated to belittle me about posting here. Most people, if they are not familiar with something, would take it like a challenge to learn at least a bit about it. Once again, I never posted with the intention of just receiving a simple answer.

The same could be said about any software that someone uses on this website and posts questions about, but I am sure that you are not the only one who posts on this website, and therefore it is safe to assume that there are many others who are in fact familiar with DD-WRT.


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#8
November 22, 2010 at 12:50:44

OK, wonderful I get the point. It seems although you are unfamiliar with this software, you feel obligated to belittle me about posting here.

Wrong and wrong.

I never said I wasn't familiar with DDWRT. I said:

"Myself, I prefer Tomato firmware to DDWRT.

This implies I have looked over DDWRT (ergo me saying, "I prefer Tomato") and decided against using it in favor of the Tomato firmware. Just for the sake of clarity, I will say pointedly (so there's not mistake) that I have indeed checked out DDWRT and found it inferior on several levels to Tomato and thus I made the choice to use Tomato. In case you're curious, I'm using the Linksys WRT54GL routers with Tomato on them as wireless access points here where I work (not my idea but due to budgetary contraints our Enterprise Wireless project has been put on hold for the 3'd year running *sigh)

I'm was not belittling you.

You said, and I quote, "but part of the reason I started the post/question was to start a conversation or maybe see if someone else had a similar experience,that's it." and I responded and told you this was the wrong place for such a discussion.

Facts:

- this is a Networking forum dedicated to networking issues (ie: lack of connectivity, routing, switching etc etc ad infinitum)
- DDWRT is software. Albeit 3'd party firmware for a Linux based router, but still, software none the less.
- Your original post, and the follow up explanation of why you posted here have nothing to do with actual networking or, a network related problem
- This, as I said, is the wrong place to post this question/attempt at a discussion.

What part of "this is the wrong place" do you see as me belittling you? Where have I ever once been rude to you or insulted you?

I haven't.

For whatever reason, you got your nose out of joint and there's nothing I can do about that. I won't apologize to you for you mistaking my meaning or (possibly) intentionally taking something I've said the wrong way because as I see it, I've done, and said, nothing wrong.

Sure, there may be other people who hang out in this Networking forum who are also (as in, "like me") familiar with DDWRT but that doesn't change the final and most important fact:

This is the Networking forum and therefore, the wrong place for a discussion on software

You're of course free to respond again (unneccessarily) but it would be a waste of your time since I won't respond again to you. If you become insulting I will delete this thread (yes, I'm a moderator on this forum). I would prefer not to delete it though in case in the future anybody else shows up here in the Networking forum looking to open a dicussion on any software I can point them at this particular thread and they'll (hopefully) understand that this is the wrong place to try to open discussions on any software unrelated to networking.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#9
November 22, 2010 at 13:56:34
I want to apologize. I cannot argue the fact that my post is not directly related to networking. Thank you for clarifying this for me. I will be more cognizant of this in the future. I have always receive great help from this site and hopefully can continue doing so and spread some of my knowledge to others as well.

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#10
November 22, 2010 at 14:16:21
No worries.....I make as many mistakes as anybode else so I'm all to well aware of how easy it is to post something in the wrong place.

I hope you come back often, find all the help you need and are able to help others.

Happy computing!

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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