NetworkTransport, LLAPI: Server disconnects client during Connect()

Completely stuck for almost a month!

I deployed my game on GooglePlay, but people from Appstore Review Team can't connect to my server.
Any other device (Android, Windows, Linux) connect fine, from various places in the world. Even my developer iphone works.

I am using LLAPI with `NetworkTransport`. I have 1 server to which all Clients ask to connect (Clients always talk to the server, never among each other).

As we see from the lines below, my server does see the connection, but looks like the client (Apple Review Team) doesn't get the acknowledgement and keeps retrying to connect every 2 seconds:

Spoiler: Server Log

Code (CSharp):

1. Log: connection {4} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20112559}, last rec time {20104501} rtt {0} timeout {8000}
2. id 4  disconnection  06/18/2020 13:00:07
3. Log: connection {5} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20114530}, last rec time {20106471} rtt {0} timeout {8000}
4. id 5  disconnection  06/18/2020 13:00:09
5. Log: connection {6} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20116537}, last rec time {20108487} rtt {0} timeout {8000}
6. id 6  disconnection  06/18/2020 13:00:11
7. Log: connection {7} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20118520}, last rec time {20110482} rtt {0} timeout {8000}
8. id 7  disconnection  06/18/2020 13:00:13
9. Log: connection {8} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20120569}, last rec time {20112494} rtt {0} timeout {8000}
10. id 8  disconnection  06/18/2020 13:00:15
11. Log: connection {4} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20122539}, last rec time {20114492} rtt {0} timeout {8000}
12. id 4  disconnection  06/18/2020 13:00:17
13. Log: connection {5} has been disconnected by timeout; address {::ffff:17.235.69.75:50142} time {20124596}, last rec time {20116495} rtt {0} timeout {8000}
14. id 5  disconnection  06/18/2020 13:00:19

My ConnectionConfig looks as follows:

Code (CSharp):

1.       var cc = new ConnectionConfig();
2.         // These are the initialization settings that worked for us:
3.         // http://answers.unity.com/answers/1699041/view.html
4.         cc.NetworkDropThreshold = 95; //95% packets that need to be dropped before connection is dropped
5.         cc.OverflowDropThreshold = 30; //30% packets that need to be dropped before sendupdate timeout is increased
6.         cc.InitialBandwidth = 0;
7.         cc.MinUpdateTimeout = 10;
8.         cc.ConnectTimeout = 2000; // timeout before re-connect attempt will be made
9.  
10.         cc.DisconnectTimeout = 8000; // with a ping of 500 a disconnectimeout of 2000 is supposed to work well
11.         cc.PingTimeout = 160;//LARGER VALUES caused timout issues, where Moscow Linux server was disconencting UK clients.
12.  
13.         cc.PacketSize = 1500;
14.         cc.SendDelay = 5;
15.         cc.FragmentSize = 1300;
16.         //cc.AcksType = ConnectionAcksType.Acks128;
17.         cc.MaxSentMessageQueueSize = 256;
18.         cc.AckDelay = 5;
19.  
20.         r_channel = cc.AddChannel(QosType.Reliable);
21.         rsq_channel = cc.AddChannel(QosType.ReliableSequenced);
22.         rsqf_channel = cc.AddChannel(QosType.ReliableFragmentedSequenced);
23.         usq_channel = cc.AddChannel(QosType.UnreliableSequenced);
24.         ac_channel = cc.AddChannel(QosType.AllCostDelivery);

People, what the hell could be causing this?

 

Did you try this ?

 

This was a bug with unity.

All things @HARPGAME mentioned were in place (IPv6 and NAT support).

The solution was to use Telepathy library, which is a small wrapper around TCP sockets, and to stop using NetworkTransport
See https://forum.unity.com/threads/socket-connection-problem-at-ios.854485/#post-5999057

 

hi,
do you know what format the time is printed in your logs?

Code (CSharp):

1. time {20120569}

I occurred the problem, that I have no way to figure out the time/date of the same connection problems.
Thanks.