Welcome! The CS3 can certainly be web interfaced. I have not, but it is covered in the new issue big CS3 digital book item #03093, and in one of the youtube marklin webibars by Curtis and Rick. Research remote control of the CS3, web interface. From page 78; In the browser, do not enter the address for a Web site. Enter the I.P. address for the CS3. Then the Marklin web interface wil appear.

Hi Marklinist, thanks for your feedback but I already did everything explained in your post and nothing happen on browser screen.

To access the cs3 with a web interface I think you have to first start a web server on the cs3, I don't it starts as a default. There is a checkbox to tick to make it autostart the next time you power on the cs3, but that is not the default.

Hi

The webserver should start automatically. The CS3 Screen Server, which is required for VNC to work, must usually be started manually, and can be set to start automatically. (in the browser).
ref Mäarklin cs3 user manual, page 36 (Short Tutorial). http://streaming.maerklin.de/public-media/anleitungen/CS3_Manual_EN_final-lo.pdf
The web interface is described on page 26

I suggest that if you have not already tried it, that you set up the local network with manual IP addresses. (you can set things back to auto later if you prefer that)
Make sure the cs3 and your pc are on the same network, eg only one router with DHCP. and that they are both connected directly into that one router.
eg. you can try something like this:
Router: (be aware of DHCP settings, and the local DHCP IP range should not include manual IP's)
Local IP: 192.168.1.1
Subnet: 255.255.255.0 (important to make this identical on all devices)

your PC:
Local IP: 192.168.1.2
Subnet: 255.255.255.0
Gateway: 192.168.1.1
DNS:192.168.1.1

Your CS3
Local IP: 192.168.1.3
Subnet: 255.255.255.0 (IP Network Template)
Gateway: 192.168.1.1
DNS:192.168.1.1

(when you get things to work change back to your preferences step by step to ensure that things are still working.)

If you need to enable CAN gateway/broadcast on cs3 you can then set it to 192.168.1.255

Add the cs3 IP to the exemption list in your firewall (s). (all ports for now). Firewall software is sometimes a bit hard to fully disable....

After you have configured the cs3, make a restart. and make sure the pc does not have any conflicting network settings etc.
if that does not, work try the button for start apps again.
(i find that the chrome browser wok quite well)

you can also try to see if the mDecoderTool software can connect to your CS3. (free on marklin.de)
The CAN gateway must then be enabled (broadcast) if I remember correctly, for it to work.
If the mDecoderTool software can see your CS3 and the browser does not work, it might suggest that the webserver does not run properly and it's recommended to call the Marklin service phone.

you can also try to google ERR_CONNECTION_REFUSED, as there might be other reasons also.

you can also try accessing the CS3 with CS3-12345.local type of address in the browser: (replace the 12345 with the actual serial number of your cs3)
http://CS3-12345.local/

Boomer, Jonjean B is very knowlwdgable, and so is Alan. If they can't help you get this resolved, I think I'd e-mail Service@Maerklin.de. and explain the problem. It may take them a while to respond. Frank Mayer was the one who replied to my issue a few months ago.

Boomer,

Have you tried updating the CS3 to the latest version? See if that helps. I use Chrome. Make sure that you allow cookies when you enter the IP address provided by the CS3.

Vaji.

The web server starts by default, at least it does on my CS3. I'm having nightmares with getting data from my CS2 into my CS3 (in fact it isn't a happening thing), but that's another story.

Do you know what tcpip address your CS3 has? There's a screen in the System area (Ethernet settings) that will tell you what it is, that's the address you need to use in your browser to connect to.

The webserver uses the standard http port, port 80 so there should be no need to change firewall settings.

Hi Bigdaddynz,

Thanks for your help. Yes it's what I thought as nothing was mentionned in the Märklin manual or in any video I watched on the subject.
Yes the TCP/IP address is what I try to enter in my webrowser on my PC/iPhone/iPad but nothing wants to connect to the CS3. I tried with the address given automatically, I tried with manual assignment but no luck until now.

Best,
BOOMer

If the MAC address is necessary it would be entered in the routers configuration software. But, it does not sound like this is not the problem. Manually setting the CS3 network addresses is not a good idea unless you are a network hardware/software guru and know exactly what you are doing.

This is what I'd do at this point.

I set the CS3 to get it's address from your router by Auto (DCHP) then don't change this setting, likewise for the PC.
Turn off/down-power both CS3 and PC leave them off at least a couple of minutes.
Do a factory reset to the router. Then restart the router following the manufacturers directions for an initial startup. Make sure it is set to provide DCHP addresses.
Restart the PC and make sure it connects to the router. Once sure the PC and router are communicating move on the the CS3.
Connect the CS3 to the router with a network cable. Make sure it is connected to one of the routers network out jacks. It must be connected to the router before turning on the CS3 on and stay connected to the router! The CS3/CS3+ do not have built-in Wifi.
Start the CS3
After the CS3 boots up completely, check that it was assigned an IP address, subnet mask, IP gateway address and and DNS server address from the router. The IP Gateway and DNS Server addresses should be identical and the first three number groups should match the assigned IP address.
If all is OK so far - enter the CS3 numerical IP address in the address window of a web browser running on the PC - it should connect.

OK, the next suspect is the router not allowing connections between devices on the local network, only allowing those connections to go out to the internet. This is sometimes done on routers to stop guest connections accessing all the local devices, and to stop spam infecting one machine from transferring itself to all the other machines on the local network.

You will need to look at the router setup (you may need to be in admin mode) to see if you can find a setting that will prevent or enable connections between local devices.

OK, have you tried to ping the cs3 from any of your devices? I would try using the IP address and also using the name that the router sees.

Yes I tried this and I have feedback when I ping the CS3 from my PC with IP address

Ok I did it again but no chance sadly still the same problem.
Thanks anyway for suggesting it :)
Best,
BOOMer

Yes KiwiAlan, everything is working until I try to connect from my browser. And honestly it's a bit getting on my nerves as it should really work and usually I'm pretty good with computers and always find a solution but there after 3 days of trials without any luck it's coming a bit difficult to understand what's the issue exactly. Even if my guesses as I mentionned earlier are going on a faulty device.

Best,
BOOMer

I’m using Edge and no special plugin installed

What about third part to accept in the PC? Did you enable the third part?

Hello Goofy,
What do you mean exactly ?
I have already third party devices on my network working perfectly and easily accessible.
Thanks

Probably time to contact the dealer! Or Märklin to find out how to perform a complete software reload including the underlying Linux operating system.

One more thought, can you enlist a friend's help with an internet/wifi setup to try the CS3+ on a completely different network?

You may be able to do it yourself if Märklin will let you download the software and provide instructions. I assume the CS3 motherboard has a BIOS that will allow the operating system to be loaded via USB or memory card - Märkiln had to get it on the CS3's computer somehow. It does seem there is a fault in your CS3+, either software or hardware. After all, the latest CS3/CS3+ software makes a network connection about as straight-forward as it can get! And, you probably don't have any hair left to pull out

One other thing, have you tried telnetting to the CS3's webserver http port to see if it is listening on port 80?

You could try this on a direct connection between your CS3 and PC (may need to use a crossover cable, and may need to assign a static tcpip address to the CS3), which would bypass and therefore eliminate any other networking equipment as a potential problem.