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Author Topic: Wrong local IP in Simple Port Tester for Mac  (Read 5280 times)

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Offline cmav

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Wrong local IP in Simple Port Tester for Mac
« on: September 23, 2013, 09:20:20 AM »
Hi Shane,

I'm a Mac user. Attached you will see an image of my local IP, which is 192.168.1.50, next to an image of Simple Port Tester. I have configured my router (Huawei E5172) to open some ports, one of them being 6180. I do have a static IP (181.135.188.123).

Interestingly, Simple Port Tester shows a failed result, whereas the online test tool shows the port is open. I've also used other online port scanners, and they all say that the port is open. Simple Port tester, however, says that my local IP address is a different one (10.37.129.2). Why does this happen?

Now, I haven't been able to connect from another computer to the server using the opened ports. I have no clue what the problem could be. Would it be related to the local IP address that Simple Port Tester gets?

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Wrong local IP in Simple Port Tester for Mac
« on: September 23, 2013, 09:20:20 AM »

Offline trpted

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #1 on: September 25, 2013, 04:14:34 AM »
I suspect that more than one NAT router is present.

If I am correct, one of the possible fixes is addressed on http://www.pcwintech.com/how-setup-two-or-more-routers-together-port-forwarding-port-triggering

To confirm that I am right in my guess, as to what is going on...

#1 What is the layout?

#2 If you are not sure of the layout, start of by physically finding the equipment..

#3 This was layout what it used to look like.

a) A phone wire and a power wire from wall jack goes to power surge protector

b) A phone wire and a power wire from power surge protector goes to my Westell-F90-610015-06

c) An Ethernet wire from Westell-F90-610015-06 goes to my Linksys E4200's RJ-45 WAN/Internet/To Modem Port.

d) All of my computers are either connected to the Linksys E4200 by wire or by wireless.

#4 If not sure of what kind of cable is (or cables are) used, just tell what you know about the layout.
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Offline cmav

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #2 on: September 25, 2013, 07:07:54 AM »
Well, the layout is like this:

* A power wire goes from wall jack to my Huawei CPE E5172.
* A power wire goes from wall jack to my phone (a Panasonic KX-TG9381).
* A phone wire goes from the RJ-45 connector of my CPE to the Line-1 RJ-45 connector of my phone.
* All computers and a printer are connected directly to the Huawei E5172 through Wi-Fi.
* I do not have a second router, either physically or wireless, in my network. There is another router, connected to the wall phone jack of another operator, which has its own WiFi. However, there is no connection between both routers and/or networks.

Furthermore:

* My computer serving as server has a fixed local IP address, the same to which the ports are directed.
* I haven't set up a DMZ, as I have no other router in my network: I would be compromising security on the server, leaving my protection to the firewall, only.
*

Offline trpted

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #3 on: September 25, 2013, 09:06:48 AM »
#1 In the screen shot, on the left side there is a list of NICs.

Select the Bluetooth PAN NIC from the list and tell me if you see the 10 point IP Address or not. If desired, also show a screen shot.

#2 You know what your non bogan Static IP Address is.

Make sure all of the computers are coming from the same non bogan IP Address.

If desired use a web based screen to help you. For example http://www.pcwintech.com/myip
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Offline Shane

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #4 on: September 25, 2013, 02:15:09 PM »
The port tester choose the first network device and thats why you see that IP.

The port tester opens the port to listen on it, but in this case you had something already listening on that port, which is why the site showed the port was open.

So it is open and you should be good to go :wink:

Shane
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Offline cmav

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #5 on: September 26, 2013, 07:11:05 AM »
There's something curious here: if the client device connects to the server from a remote location, I get the connection. However, if the client device connects using the same Internet connection (i.e. from the same LAN and connecting to the Internet using the same router and same public IP address), then the connection fails. So, the port is open, however, there's something strange preventing to use it if the client device uses the same connection as the server.

Offline Shane

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #6 on: September 27, 2013, 12:40:46 PM »
That is because most home routers dont support reverse nat
http://www.pcwintech.com/test-for-reverse-nat

SO when your connecting to yourself you have to use the local IP. Only people outside your network should use the Internet IP :wink:

Shane
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Offline cmav

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #7 on: September 27, 2013, 05:23:29 PM »
Thanks, Shane! The problem is exactly that: my router doesn't support reverse NAT. Can you suggest a simple equipment that does?

Offline Shane

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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #8 on: September 27, 2013, 06:26:40 PM »
Normally small business grade routers do, such as the netgear prosafes.

But that is a bit of money just for that option lol. Normally it isnt a problem to just use a local IP.

Or, at least in Windows, you could setup a free DDNS name, which points to your Internet IP, and have the client on your computer connect to the ddns name. So the trick is the Windows host file, you put the ddns name in there and have it point to the local IP.

I am sure MAC has a host file of its own.

Shane
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(About Shane)
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When people ask "Why fix what isn't broken?" I reply "To make it better."
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Re: Wrong local IP in Simple Port Tester for Mac
« Reply #8 on: September 27, 2013, 06:26:40 PM »