TV Client - "Unable to detect host" over VPN (3 Viewers)

[DragonQ]

If you do a cmd : telnet ipofyourserver 31456 does it work ?

Update from me: yes, I can telnet to my server from work via the VPN. Well, I assume I can; it doesn't crash, I get a blank command prompt after running telnet.

So if telnet works and ping works, why on Earth is MP Config not able to see the server?

EDIT: Manually entering my server's hostname under TVService -> Hostname in MediaPortal.xml works! So it's obviously just a problem with MP Config.

 

[mm1352000]

Are you able to install Wireshark and capture what happens when you test the connection?

 

[DragonQ]

Never used it before - how easy is it to use?

 

[mm1352000]

Very.
Install takes only a minute.
Run it. Select network interface using the left-most button, then start capture. You should see packets added to the list in the top half of the interface as network activity on the interface occurs. Once you've done the test, click the stop button (red icon). Save to file, zip and attach. Please try to keep the file size to a minimum so it is easy to identify the appropriate network traffic. You can stop and restart the capture as many times as you like.

 

[DragonQ]

OK I started a capture, pressed "Test Connection", then stopped it. However, when I look through the results I see no mention of either my server's hostname or IP address.

 

[mm1352000]

Yeah, I don't see anything in that capture.
I tried the same test on my local PC and I don't see the packets there either, but I think that is because the packets are on the 127.0.0.1 interface. I've got a relatively old version of Wireshark here so I'll upgrade, try again and report back...

 

[mm1352000]

Hmmm, no good.
I've checked the code and it looks like it just attempts to open a connection to port 31456 on the remote host. Very straightforward. I assume packets would have to be sent in order to open a connection, but maybe not (can anybody else confirm?).

This sure is a puzzler.

Are you able to confirm the same behaviour as Subigo - if you change the streaming server IP address, does it start to work?

mm

 

[Sebastiii]

When i have work on the branch about detection of tvservice, i have see something strange about taking ipv6 and not ipv4 adress and then it failed somehow but i have do the test on the branch where i have start to implement the new code.

It seems nobody try the supplied bin (just to know if it's the same) or maybe i didn't see answer about it

 

[Sebastiii]

Here the link : https://forum.team-mediaportal.com/...-to-detect-host-over-vpn.119652/#post-1002337

 

[michael_t]

...I've checked the code and it looks like it just attempts to open a connection to port 31456 on the remote host. Very straightforward. I assume packets would have to be sent in order to open a connection, but maybe not (can anybody else confirm?).

To open a tcp port connection IP packets do have to be sent. So if you do not watch any, there is no connection opening at all. Did you enter the IP address of the tv server or the server name? In the latter case there must be a name resolution before the TCP connection can be opened. This can be done either by DNS lookup or by netbios (which is working only in a local network and not on a vpn connection). The name resolution should be visible in the wireshark logs.

Michael