IP address of router?

Hi knowlton,
Runnig VNC through routers/Firewalls

If you are on the CONTROLLING computer and are behind a router you will need to open port 5900 TO the IP address of the CONTROLLED PC. (this is usually the external IP address of the router at the CONTROLLED end)

You will need to set the router at the CONTROLLED end to forward port 5900 traffic to the CONTROLLED IP address).

NB. VNC web traffic travells over ports 5800 to 5900

Why the different numbers?

VNC installs a mini web server that listens on ports 5800 to 5900, it does this because, if you need to control multiple PCs you can set so that the last two digits of the port number become the DISPLAY number (client number)

for example

machine 1 = 0 (thats port 5800) to connect type http://<public IP address>:5800
machine 2 = 1 (thats port 5801) to connect type http://<public IP address>:5801

Obviously at the CONTROLLED end the router/firewall must be set up to forward port 5800 to machine 1's IP address etc.

Why port 5900 then?

The APPLICATION uses this port


*****Links*****

Download RealVNC
http://www.realvnc.com/

Download TightVNC
http://www.tightvnc.com/

Connecting over the web Java VNC Viewer
http://www.realvnc.com/javavncviewer.html

PeteL

What if a port other than 5800 to 5900, say port 8700 for example?

Can I still force a connection, through VNC or someother way?

My wife is at home and I had her run whatismyipaddress.com

This gave her an IP address.

Now what do I do?

I know that a port is open for remote administration of the router.

This feature is enabled and I know what the port number is.

Can this help me?

(DLink router)

Knowlton,
  VNC uses two different ports, though you can have functionality with just one. If you want to use 8700 then you would open that port on your firewall. Using VNC from the remote location you would enter the hosting computer (actually the firewalls) IP address then a colon and the display number. The display number would be 5900+n so 8700-5900= 2800.  So 2800 is the screen number you would be connecting to. Now with this one port you do not have the web functionality - so you must use the VNC viewer to access your hosting computer.

With the feature of remote administration of the router - that is to allow you to connect and change setting in the router - not to allow remote connections into the network. (Sorry if you already knew that and I misunderstood your last statement)

Gigco

With the feature of remote administration of the router - that is to allow you to connect and change setting in the router - not to allow remote connections into the network. (Sorry if you already knew that and I misunderstood your last statement)


So if the router administration port is 8700....I cannot use that to connect via VNC?

> So if the router administration port is 8700....I cannot use that to connect via
> VNC?

No, that is the port that will allow you to connect to the router and configure the device. Routers don't typically have a specified port that is used for remote applications to the INSIDE of the network (i.e. WAN to LAN). Though armed with your ip address and the admin port you can either use the web interface of the router config or possibly telnet into the device. Try connecting to your ip via http://<yourip>:8700 and see if you are prompted for a login. You are going to need some ports opened to enable VNC to work. And to do that you will need to get access to your router configuration.

Gigco

http://<yourip>:8700

Does not work  (says page not found).

I am loathe to reveal the actual IP and Port number that I am using, due to security concerns, but I can only say that I have both of them and am unable to connect to the router.

>I am loathe to reveal the actual IP and Port number that I am using, due to
>security concerns, but I can only say that I have both of them and am unable to
>connect to the router.

Don't ever post your ip in a forum - for "security concerns" it is important that you keep that information to yourself.

What D-Link router are you using, model? What you may want to do is go to http://support.dlink.com/ and see what the recommended method of accessing your DLink router is. It's possible that the web feature of accessing the router is disabled and needs to be turned on internally or using a data cable depending on the type of router you have. DLink does post all of their manuals on that website and that should give you the specifics for whatever model you have.

Gigco

<quote>
It's possible that the web feature of accessing the router is disabled and needs to be turned on internally or using a data cable depending on the type of router you have
</quote>

I can double-check this...but pretty sure that this feature has indeed been enabled on the router, along with a port number (which is above 8000)

I do not know the model.

It is a recent purchase (within the last year).  4 port wireless internet router is all I know.

My wife loves it cuz I bought a wireless NIC for her laptop and she can sit in bed and chat with her girlfriends on her laptop.  :)

OK . This is simple
(Home PC)----VNC---- (Office PC)

Install VNC in your home PC and connect to the Internet. If you are using static IP its good if not then too bad as you need this IP address. (go to command prompt and type ipconfig or winipcfg)

There are 2 ways
-----------------Connect to home from Office
1)Run VNC server on your home PC and initate VNC viewer from your office PC using the IP address of your internet connection. Key in the password you set when you activate the VNC server at your  home PC and you are connected.
-----------------Connect to Office from Office
2) Run VNC Listening viewer on your Office PC and right click on the VNC icon on the task bar and add client and key in IP address of home PC. Your home PC will be connected to your Office PC.

please pay attention that 192.168.0.0/16 is a private IP class, so u would need a Public IP on your pc that u r gonna connect to using vnc (If u r not at the same subnet ! for example if u r @ work) first of all test your connection by pinging your home pc when u r @ work, if u can ping it then u can do anything else ! ;)
and for remote administration I recommend : www.radmin.com because of its performance is much better than vnc and is easy to use ;)
Regards

Router is a DLink    DI-614+   (to answer an earlier question)

I keep hearing about enabling "port forwarding"?????

To recap, here is a diagram that shows what is happening:

http://www.knowltonfamily.com/connect_attempt.gif


Here are my current Virtual Server settings:

http://www.knowltonfamily.com/current_virtual_server.gif


Here is what is listed under "Firewall":

http://www.knowltonfamily.com/cur_firewall.gif
/connect_attempt.gif

yes, u r ture, if your router has a Public IP number may be u can use port mapping or port forwarding for your goal, I describe the concept :


Your PC in Home--------Your router in Home-------------INTERNET--------------Your PC in your office
192.168.0.101                  192.168.0.1                                                            81.81.81.81
                                       80.80.80.80 (for example)                                       (for example)
                                             |
                                             |
                                      Public IP
now u want to connect to your PC @ home, because it doesnt have any public IPs you simply can not do it directly, u should do something else : config your router to map one of its ports to one specified port of your home PC. clear ?

it means that for example : port 8222 of your router is equal to port 1234 your home pc
                                               80.80.80.80:8222 == 192.168.0.101:1234

u can specify the details of port mappig, I dont know the IOS of your router and also dont know if your router does it or not. may u can find it on its manual.
I hope this could help a bit ;)

I'm sorry....I am not sure I understand what you want me to do, exactly.

The key to your setting is to configure the firewall on your router. Therefore you need access to your router. Since most routers has web interface you can try this:

run ipconfig /all on your home pc to find its gateway ip, say it's 188.18. 0.1.
open a webbrower, in address bar type in: http://188.18.0.1 and hit enter.

If this pulls up a webpage from your DLink router then you can see what the firewall setting is and set up port fowarding etc if the router has that built in. Most do. Also you might need to put a port number after the above address. Refer to your router's manual for specific information.

An update on this:

EVERYONE:

Yeah....I'll keep this question open for a while.

I did call MSN Broadband Support.

I don't know how much of what they told me is really TRUE....but here goes.

They said the DSL 1000 modem does not allow you to configure the firewall, etc.....because in the past attempts to do this have apparently FRIED the firmware....to the point where you cannot access it any longer, thus cannot even restore it to factory defaults once you trash it.

He gave me some options, none of which sound very appealing or worth the hassle.

He mentioned that Qwest has an Action Tec modem (model 1520 or 1524) that offers a workaround.  At some point during the setup you have to enter what the support peson called a "key code"

ActionTec modem config available at 192.168.0.1

First key code:  9436814@msndsl.net

Second key code:  6JSLtRVF4      (that was a lower-case T in the middle of all of that)

After doing this apparently you can enable the port forwarding BLAH BLAH BLAH

~~~~~~~~~~~~~~~~~~~~~~

He said that the ports necessary for VPN Tunneling were already OPEN on the DSL 1000 modem....but he doesn't know or cannot say what the port numbers are  (I asked).

~~~~~~~~~~~~~~~~~~~~

Also mentioned something he called "Legacy Qwest" modems that are sometimes available for sale on e-bay and the like.   Modem was a CISCO 678  (said make sure to get the  DMT  firmware???   and NOT the CAP.....whatever that means)


So, that is about it.


Goodnight everyone.



Tom

For details see another similar thread I posted on EE:


http://www.experts-exchange.com/Networking/Q_20893409.html

At this point.....I will consider alternatives to VNC, with the following requirements:

1)  Since my MSN POS DSL 1000 modem does not allow configuration, the alternative to RealVNC must work around this limitation  (not depend on port forwarding)
2)  Ideal solution would be freeware.  RealVNC has spoiled me.
3)  I will consider $50 or under, I assume will have a 2 site license so I can connect home to work, work to home.

I have used PC Anywhere in the past....and I suspect it would work....but would rather use freeware.  What can I say...I'm CHEAP!!!!

EVERYONE:

Check this out:

http://www.subwolf.org/v2/articles.php?article=3


I haven't had a chance to try it yet.

What Operating Systems are you running on the workstation and the Laptop?

jdugger:

Just so you know.....I am moving to a new ISP / with a new DSL modem / router.


My OS is Windows XP Home on both the workstation and the laptop.


Tom

This is very easy to do.

1. Give the Workstation a static ip. Give it 192.168.0.101 with a subnet mask of 255.255.255.0 and the default gateway 192.168.0.1

2. Next you need to log into the router. Open your web browser and in the address box type 192.168.0.1. A dialog box will open asking for a username and password. The username is admin and leave the password blank.

3. Once your inside the router, Click on the Advanced tab and on the left select DMZ. Give it the address 192.168.0.101.

4. Go to www.whatismyip.com. This will be you public ip. The 192.168.0.101 is your private ip.

5. Now you should be able to open realvnc and type in the public ip and be able to access your workstation from anywhere.

Won't this be a problem if the modem does not allow port forwarding?

You don't have to setup any port forwarding.

When I get my new DSL modem I will try your suggestion!!!!!

Right now I am on Dial-up and am not going to bother.

Tom

That would probably be a good idea.

Your router has a public IP. The other PCs are on the internal network have private IP.
Let the routers public       IP be 77.77.77.77 and the private IPs of the internal PCs be 10.10.10.2 and 10.10.10.3 . The router will also have an internal private IP say 10.10.10.1 .
If you are running a Web server on your internal machine , then the router will have to maintain a mapping of its own port number to internal PC's IP and port no.
So if the Webserver is running on 10.10.10.3 on port 8888, then the router will contain the following table;
                +-----------------------------------+
      | Port | Private IP | Private Port |
      +-----------------------------------+
      |  80  | 10.10.10.3 |    8888      |
      +-----------------------------------+

Any outside request comming on 77.77.77.77 on port 80 will be redirected to 10.10.10.3 at port 8888.
you can have multiple services running on multiple machines, yet it appears to be running on single machine.

This concept is called NATing (Network Address Translation).

If you would like to know the IP you are looking for, the easiest way is to call up your ISP and simply ask them.