TLCV can't connect to server

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AlvaroBegue
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TLCV can't connect to server

Post by AlvaroBegue » Thu Jul 13, 2017 9:36 pm

Hi,

I am trying to follow a tournament my engine is involved in. I've been given the server GrahamCCRL.dyndns.org and the port 16001. Unfortunately, both TLCV (running on Linux using wine) and Livius claim they can't connect. I've never used TLCV before, so perhaps I am doing something stupid.

I also cannot ping the server from the command line. I don't think my router's firewall is too restrictive: It's supposed to allow outbound connections at any port.

Any ideas what the problem might be? Do I need to allow and forward incoming connections or something of that sort?

Thanks!
Álvaro.

Sven
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Re: TLCV can't connect to server

Post by Sven » Thu Jul 13, 2017 10:07 pm

Are you trying to connect via a mobile network? If so: I have never managed to connect to GrahamCCRL.dyndns.org that way, so maybe the root cause of your problem is the same as mine?

AlvaroBegue
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Re: TLCV can't connect to server

Post by AlvaroBegue » Thu Jul 13, 2017 10:11 pm

I'm not sure what you mean by a "mobile network". I am using wifi inside my house, but that should be irrelevant.

tmokonen
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Re: TLCV can't connect to server

Post by tmokonen » Thu Jul 13, 2017 11:15 pm

TLCV uses UDP. Just a stupid guess, but maybe your firewall is disallowing UDP traffic on that port?

AlvaroBegue
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Re: TLCV can't connect to server

Post by AlvaroBegue » Thu Jul 13, 2017 11:43 pm

I don't think that's the issue. I can't ping the server either, and I can ping other servers. Perhaps it's a DNS problem? I am getting GrahamCCRL.dyndns.org translated to ping 172.217.10.78 . Can someone else try to ping it and see if it works?

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JVMerlino
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Re: TLCV can't connect to server

Post by JVMerlino » Thu Jul 13, 2017 11:49 pm

AlvaroBegue wrote:I don't think that's the issue. I can't ping the server either, and I can ping other servers. Perhaps it's a DNS problem? I am getting GrahamCCRL.dyndns.org translated to ping 172.217.10.78 . Can someone else try to ping it and see if it works?
I get 222.154.252.101 with my ping. I'm using Windows 10 with a home wifi.

But I have had several instances when I couldn't connect using other networks. Sometimes the specific port needs to be opened, but usually it was because the IP needed to be whitelisted.

elpapa
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Re: TLCV can't connect to server

Post by elpapa » Thu Jul 13, 2017 11:52 pm

AlvaroBegue wrote:I'm not sure what you mean by a "mobile network"
He means a 3G/4G network connection, mobile = cellular.

AlvaroBegue
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Re: TLCV can't connect to server

Post by AlvaroBegue » Fri Jul 14, 2017 12:08 am

JVMerlino wrote:
AlvaroBegue wrote:I don't think that's the issue. I can't ping the server either, and I can ping other servers. Perhaps it's a DNS problem? I am getting GrahamCCRL.dyndns.org translated to ping 172.217.10.78 . Can someone else try to ping it and see if it works?
I get 222.154.252.101 with my ping. I'm using Windows 10 with a home wifi.

But I have had several instances when I couldn't connect using other networks. Sometimes the specific port needs to be opened, but usually it was because the IP needed to be whitelisted.
Oh, sorry. I have the same IP. I copy-pasted from the wrong test.

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hgm
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Re: TLCV can't connect to server

Post by hgm » Fri Jul 14, 2017 6:30 am

AlvaroBegue wrote:I don't think my router's firewall is too restrictive: It's supposed to allow outbound connections at any port.

Any ideas what the problem might be? Do I need to allow and forward incoming connections or something of that sort?
Indeed, you need to open the firewall(s) for incoming connections. In particular, you need to map the port of the broadcast for UDP to the machine you run TLCV on. I had to do that in both my modem and my router, and then allow TLCV to service requests from that port in the firewall of the machine it runs on.

AlvaroBegue
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Re: TLCV can't connect to server

Post by AlvaroBegue » Fri Jul 14, 2017 8:06 am

hgm wrote:
AlvaroBegue wrote:I don't think my router's firewall is too restrictive: It's supposed to allow outbound connections at any port.

Any ideas what the problem might be? Do I need to allow and forward incoming connections or something of that sort?
Indeed, you need to open the firewall(s) for incoming connections. In particular, you need to map the port of the broadcast for UDP to the machine you run TLCV on. I had to do that in both my modem and my router, and then allow TLCV to service requests from that port in the firewall of the machine it runs on.
That means I can only run the viewer in a particular machine in my home, and I have to mess with router/modem/firewall settings if I want to run it on another one.

This is just too much of a pain. I have lived a happy live to this day without using TLCV, so I guess I'll be OK without it until they move to a connection-based protocol. :)

Thanks for the help.

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