Telnet port 8181 connectivity issues

Nicogou2103

Greetings,

I just recently changed my UPC Cablecom box to a Sunrise connect box 3 and I have an issue which was not the case with the old box.
I am using a software that has an API Excellintegration application, enabling to link Excel. For some reason, since I have the new box, this application no longer works. I have tried on 2 diffrerent workstations that are connected directly by cable to the box and the issue persists.
This afternoon, when using a laptop computer and connecting with a mobile “Salt” box, the application works normally.

Can someone help with this issue?
Attached, you will find the answer from the software support that I initially contacted. As well as the result for the telnet test they asked me to perform

Xydocq

hello Nicogou2103

Welcome to the community.

Please log on to your Connect Box 3 and have a look at Admin > Info check the WAN IP Settings. If it says anything about IPv6, you might want to call 0800 707 707 and request a switch to IPv4 protocol.

Also if you open command prompt and enter ping localhost does it ping 127.0.0.1 or [::1]?

Daniele_Sunrise

Nicogou2103 Welcome to the community!

I have taken a look at your modem. I have done the following to process your request:
- The firewall has been reactivated
- I have assigned a fixed internal IP address to 5 devices
- As UPnP has already opened a port automatically for the IP 192.168.1.128, I have also opened port 8181 for this internal IP address
- The port checker now shows an open port
- UPnP seems to be deactivated again

Can you please test if everything works?

Greetings
Daniele

Xydocq

Nicogou2103

you’re doing fine.

looking at the results. there is no active port 8181 listening on your device. the telnet-test showed the same result, no port to be found. Since you were always testing local-ports, I’m very sure it’s not related to the port forwarding on the Connect Box 3. The Connect Box 3 forwards the port from the internet to a local device but not from local device to local device.

netstat -ano will give you a list off all ports active or listening on your computer.

It would be helpful to see results from a working computer.

Nicogou2103 This afternoon, when using a laptop computer and connecting with a mobile “Salt” box, the application works normally.

This laptop-computer doesn’t work when connected to the Connect Box 3? Or is it a different device?

If it is a different device. Did you ever try to re-install/repair the API on the computers not working?

Btw. don’t worry about this:

Xydocq You can try to edit the hosts-file by entering the line localhost-trendingtechnologies.com 127.0.0.1

it’s not a command and doesn’t do anything when entered at the command prompt.

Nicogou2103

Daniele_Sunrise
Thank you for your feedback.
Indeed the firewall was deactivated since I was on the phone with Sunrise Support trying to find out where this could lead.
I have checked and it does not seem to be stable. I do not have an error message anymore but when I try to activate it, it just cancels the link with excel after less than 5 seconds.

Daniele_Sunrise

Nicogou2103 Is the service running via IP 192.168.1.128 and if so, does this IP have an active firewall such as the Windows one? If the answer is yes, has port 8181 been opened in Windows or for the corresponding Windows application?

Are you using security software such as Antivirus or Malwarebytes, etc.?

Greetings
Daniele

Nicogou2103

Daniele_Sunrise

Here is the screenshot of the IP address it’s currently running on. I have removed Norton antivirus and disable the firewall of Windows. So it’s not coming from there. I have tested again if port 8181 is open and by looking at the result below, I do not have the same state as it did in my initial capture screen when sending my first message in the forum

Nicogou2103

so I’m guessing that it’s open

Daniele_Sunrise

Nicogou2103 I have changed the internal IP of the port forwarding from 192.168.1.128 to 192.168.1.125 (see your screenshot above). Can you please test it again?

Please check the feedback from Xydocq too.

Greetings
Daniele

Xydocq

I’m not really familiar with this type of software.

Also

The 127.0.0.1:8181 doesn’t require port forwarding on the Connect Box 3. It is a loopback-address pointing back at itself and has very little to do with the internet.

I would say it is a DNS issue more likely then a port forwarding issue. You will need to run those tests on both networks (working/not working) to see if the results are any different.

Nicogou2103

Here are the results of the tests

Xydocq

Nicogou2103 thank you for the information.

Your command line isn’t correct, please copy this one netstat -n | findstr 8181 and paste it. Using the ¦ will result in failure.

I don’t have the Port 8181 open or active so I checked for port 80

Since the ping test failed too. Your computer doesn’t associate the URL with itself. You can try to edit the hosts-file by entering the line localhost-trendingtechnologies.com 127.0.0.1

Nicogou2103

Xydocq
Hello,
Not quite sure if I understood correctly cause’ my IT knowledge in this aspect is limited… Here are the results if I did it correctly

Nicogou2103

Xydocq
Here are the active connections following the check

It’s a good idea to see what are the results from the laptop computer in order to see the variances. I will do so later on today.
This computer does not work on the connected Box 3 (meaning it can be connected to another wireless supplier than Sunrise)…
Yes, I have reinstalled the API on the computers not working.

Nicogou2103

Xydocq
Hello,
Coming back to the subject, I have tried making the checks talked about previously and this are the results. I have double ckecked with this laptop and the connection to a wireless connection SALT, and the API works.
The retest has been made with the laptop and with the Salt connection

Xydocq

Nicogou2103

It seems the only difference is the ping result when “localhost-tradingtechnologies.com” is translated correctly to 127.0.0.1.

In order to achieve this on your computer. Open up explorer and go to C:/Windows/system32/drivers/etc , you’ll see a file called hosts. Open the host file with Editor. Add the line “127.0.0.1 localhost-tradingtechnologies.com” to the file and save it.

You will be able to find lots of help online when googling “how to edit hosts file windows”

Nicogou2103

Xydocq
It worked!!!! Thank you so much for your help!!!!