Problems with port 23424 on various browsers

I use serviio PRO evaluation version and plan to buy the license, but I will only do that if I get the mediabrowser working on something other than a PC.
What I have working:
- Serviio server, has indexed thousands of files, works great
- LG TV connected over DLNA through WiFi, works great
- PS3 connected over DLNA, works great
- Laptop connected over WIFI, using address "http://server:23424/mediabrowser/", works great

So now my question:
- Using the address "http://server:23424/mediabrowser/" on a Samsung tablet, page refuses to load
- Using the same URL on a Samsung S3 mini phone, page refuses to load
- Using the same URL on an iPhone (iOS7) , page refuses to load
- Using the same URL on a WII, page refuses to load

So, am I doing something wrong? Are these devices incapable of using port 23424? If so, does Serviio have the possibility to use a different port number?

Forgot to mention: tried the same URL on iPad, doesn't work either. So the only devices that do show the mediabrowser are PC's. That's not enough.

[will]

Check that port 23424 isn't blocked by your PC's firewall.

I assume you mean the firewall software on the PC that I use as a server, that hosts the Serviio-software?
On the problem description, I wrote

Laptop connected over WIFI, using address "http://server:23424/mediabrowser/", works great

So, if the server does block this port, the Firefox browser on my laptop wouldn't work as described, would it?

(EDIT: I checked the server, the firewall is switched off)

[zip]

are all your devices on the same wifi as your serviio server? or over 3G?

All devices are on the same LAN as the Serviio server, most of them even within the range of the same WiFi access point. With perfect signal quality. The iPhone and Samsung that do not work, are lying next to the laptop that works. And this iPhone and Samsung do perfect with other websites.

[DenyAll]

I assume you are using the IP address of the server in the string "http://server:23424/mediabrowser/" eg. you are using something like "http://192.168.1.2:23424/mediabrowser/"

If you access "http://192.168.1.2:23424/cds/application/" (substituting your server's IP address) from your device do you receive a response? What about "http://192.168.1.2:23423/rest/application/"?

Hey wow, that seems to be the right trick. I did not use the IP-address, I used the server name. Now I tried it using the IP-address in numbers on my iPad and it seems to work. I will now test on all other devices. I will post the results of those tests. For now, thank you so much!!!

EDIT: it works on the other devices as well, apart from the WII (probably too old). The WII says "protocol not supported", which makes sense. Again : thanks!

[zip]

The Windows laptop will know the server name via the Windows network, but the phones don't have any such name -> IP resoultion, so you have to go with the IP address (for local connections )