Wireshark-users: Re: [Wireshark-users] Diagnosing disconnect exactly every 10 minutes in online g
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From: Michael Holt <m.iostreams@xxxxxxxxx>
Date: Fri, 10 Sep 2010 03:27:51 -0700
Hi Austin,

Just an FYI for future reference, you usually want to save the capture file in binary format, rather than ascii text.
From Wireshark, File -> Save As -> somefile.dmp

This makes it a lot easier for someone to open the file in Wireshark and see what you are seeing.

 -- Mike

On 9/10/2010 2:09 AM, Martin Visser wrote:
Receiving a FIN-ACK from the server basically indicates that from server's point of view it is done with that session. Your client ACKnowledges that packet, and also concludes the session from it's end.  The RSTs are probably just the result of your clients packets that were still "in flight" at the time of session termination.

So from a TCP protocol everything is normal, the server had nothing more to tell you on that session, so it ends it.

It could be terminating for any reasons, maybe such as it doesn't believe you are authorised anymore, or the like. I imagine some gameservers might allow you to play with 0 credit for a period of time, or maybe it thinks the game running on your machine isn't genuine. 

It could also be that some other device like your firewall or the ISPs firewall is spoofing the server's FIN flag, but this is not likely - unless there was a good reason your ISP wanted to limit your traffic using that game.

I'm not sure if this will help you, might you might be able to think of a reason why you are being dropped by the server.

Regards, Martin

MartinVisser99@xxxxxxxxx


On Fri, Sep 10, 2010 at 4:31 PM, Austin Kretzer <austink3d@xxxxxxxxx> wrote:
Hello everyone,

I am trying to find out some help or direction for a problem I am having. I am playing an online game called Final Fantasy XIV, and for some reason every 10 minutes exactly, I get disconnected. My connection quality up to that point is fine, no lag. I don't know much about packets and Wireshark, I just downloaded it today. I have been trying to fix this problem for days now, with no luck. I ran Wireshark and started the game. Everything from my basic knowledge appears normal up to the 10 minute mark where I get this disconnect. I get hit by a FIN,ACK packet from the server for some reason, which my IP then replies with a ACK, and then its own FIN,ACK packet. After that I get four TCP RST packets from the server, and my connection goes down. I have no idea why the server would be doing this, or if its something in my own line doing it. Its the server's IP sending the first packet, but that makes no sense that it would only target me.

This only happens with this game, I have no problem browsing the internet. I have a 3MB DSL line from TDS. I hooked up my computer to a friends Comcast cable connection and played the game and it worked fine for hours on end, so I know its a connection issue. I have tried everything I know how to do, but I am more of a software and hardware kind of guy. Networking is my weakpoint besides the basics. I haven't found many people at all in the game having the same problem, and I have only found a few issues like this online through google with other games/general issues. I have tried every fix I have found so far with no luck. 

I have a screenshot of what happens at the 10 minute mark, as well as the full capture of my 10 minute connection to the game for all of you to look at.

Please go to:

There, I have the image as well as a link to my full capture.

I hope I am not asking too much, I am just terribly lost with this issue, and I have ran out of ideas and I am to my wits end. Any help or suggestions or anything at all would be greatly appreciated. Thank you for reading!



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