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Topic: Question about DirecWay's NAT  (Read 2039 times)
Wizdoms^
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« on: January 26, 2005, 07:55:41 PM »

Hey, im sure this question will be pretty easy for Rev =P but how can i allow ports to be open through the DW6000? For fun i tried to set up a VNC Server on my machine, for emergency use and whatnot.. but when i tried to use it i was not allowed through.. and i even tried many common ports.. i.e 80, 21, 81... stuff like that =P Does anyone know if i can open ports on the modem? or are they open and something was not working right? Thanks in advance!

Wiz^
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bradhouser
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« Reply #1 on: January 26, 2005, 10:52:38 PM »

I think you will not be able to open up ports for VNC, since it is Dway that has blocked them, not your modem.

Brad Houser
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Wizdoms^
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« Reply #2 on: January 27, 2005, 06:11:53 AM »

Thanks for the reply, i have opened many common ports on VNC and tested.. so far none of them work.. Ive even tried ports that people use on every day basis.. its pretty weird..
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bradhouser
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« Reply #3 on: January 27, 2005, 06:58:18 AM »

Here are several reasons I can think of why you can't use VNC through DirecWay:

1. Private IP Address. DirecWay is acting like a NAT router. If you are like me your host has an IP address that begins with 10.x.x.x. These are by definition unroutable, because they are not unique.  A simple test: Can you even Ping your system from another system on the internet? If not, forget about VNC. If you can then you don't have a private IP address, you must have the business account.

2. Firewall. You have tried many ports on VNC, including "open" ones lke port 80. VNC listens on port 58xx and 59xx where xx is the viewer number (0 is the console). VNC interprets ports under 100 as being added to the basic 5800 and 5900. So if you could open port 5980 and 5880, then you would be able to enter port 80. To really use port 80, you should enter a negative number like -5820. Look here; http://www.uk.research.att.com/archive/vnc/faq.html#q54

3. Router. You have the DW6000, which acts like a NAT router below the DirecWay system. You need to open ports there as well, and perhaps a DMZ as well. This will allow your client to appear to the rest of the network as your DirecWay IP address (even though it has a private IP address to your local network). I don't have the DW6000, so I dont' know if this can be done. I have the DW3000 (DRS) and I know I can't do it.

Brad Houser cool
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Wizdoms^
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« Reply #4 on: January 27, 2005, 09:11:02 PM »

Thanks for the reply again.. here i go =P

I understand how DirecWay works, i can ping my system from non local machines, from several locations.. and i know its my machine because if the 900 ping =P
I dont have a firewall and i do understand how VNC porting works.. BUT.. im using a "Mod" of VNC called TightVNC.. Very easy to use, ive tried the original WinVNC.. So i was used to using the -5920 and when i enter it. it gives me port 80.. so that is not the problem.. I am using a router on my system.. but i am routing the ports through it right to my IP, My network is as follows.. =P

1. DW6000
2. Linksys 5 port router ---- into my pc
3. D-Link wireless router with DHCP DIsabled.. (expencive wireless switch)

Im still trying to figure this out because it would be a nice feature to have incase i need to access my pc remotely.. Thanks for your help brad.. i appriciate it.. But i still think that Dway disables external ports.. i mean.. hell... they dont even let us download over 200 megs =P I wouldnt doubt that they block webserver ports..

Thanks!

Wiz^
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bradhouser
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« Reply #5 on: January 28, 2005, 07:13:26 AM »

I think you are right that Dway is doing something different with port 80, probably because of the Web Acceleration feature. Just to eliminate everything else, have you tried elimating the two routers and connecting directly to the DW6000?

The other thing I tried is the Shields Up! test at GRC.com. It showed every port from 0-1056 in Stealth mode.

Brad
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