*CONFIRMED FIX FOR DESYNC*

[ripzeus 9]

*I'm not sure if this thread should go here, and if it doesn't please move it the correct area.*

 

 

 

It seems I have come across a fix for massive desync's (At least for me).

 

I run a UTM gateway called UTM 9 by Sophos and came across something that has relived my desync altogether. Now during a normal and desync gameplay there are UDP packets sent from the server to the client in *MASS* causing a UDP Packet Flood, during this flood of incoming data, my gateway sees this as a potential threat and stops it at the door on UDP ports 2302-2305, (This method was tested during a 100k desync) while I was desynced I went into UTM9 checked Anti-DoS and Flooding real time logs and watched my firewall/gateway block everything on those ports. 

 

After everything was confirmed that UTM 9 was blocking these packets from the server, I proceeded to add an exception to skip UDP Anti-DoS/Flooding on ports 2302-2305 within Intrusion prevention. Once the exception rule was added my desync cleared up and I was able to play again.

 

Now for people who do not have UTM 9 and have a standard router/firewall, you may need to look to see if you have any kind of anti-DoS/flooding control and create an exception for those ports explained above.

 

I hope this help everyone who is having these desync problems.

 

http://feedback.dayzgame.com/view.php?id=4507

Edited February 24, 2014 by ripzeus

[djporternz 644]

Not being too familiar with anything network related, thanks for the post. Testing it ATM and results look very promising. If I may ask a few questions, though, in no particular order:

 

• I'm assuming that WRT DayZ desync that I don't need to increase the ICMP/TCP-SYN numbers?
• What would you recommend as a suitable UDP threshhold. My system defaults to 500 and I've boosted this up to 750 for testing. Do I need to go higher? Is a lower value a better compromise to desync/security?
• Is there any Windows system/Windows firewall settings that may be hitting UDP throughput?

If you are able to share any answers for these it would be appreciated. As I said, networking is a big black hole to me :)

[ripzeus 9]

Not being too familiar with anything network related, thanks for the post. Testing it ATM and results look very promising. If I may ask a few questions, though, in no particular order:

 

• I'm assuming that WRT DayZ desync that I don't need to increase the ICMP/TCP-SYN numbers?
• What would you recommend as a suitable UDP threshhold. My system defaults to 500 and I've boosted this up to 750 for testing. Do I need to go higher? Is a lower value a better compromise to desync/security?
• Is there any Windows system/Windows firewall settings that may be hitting UDP throughput?

If you are able to share any answers for these it would be appreciated. As I said, networking is a big black hole to me :)

 

 

No you don't need to do anything with ICMP/TCP-SYN Numbers as the only packets DayZ uses are UDP.

 

I have my thresh hold around 1500 and still got 100k desynced, so I am not sure if the UDP Threshold has any effect.

 

Possibly not, since the UDP ports are 2302 thru 2305.

[djporternz 644]

Thanks, good to know. I'll leave it where I've set it and monitor the situation for a bit.

 

Dean mentions desync in the latest devblog: http://youtu.be/19ehC8kwoWE?t=11m30s

Seems it may be related to server->client spam for inventory. I don't think anything we do is going to fix that.

Edited February 25, 2014 by DJPorterNZ

[ripzeus 9]

Thanks, good to know. I'll leave it where I've set it and monitor the situation for a bit.

 

Dean mentions desync in the latest devblog: http://youtu.be/19ehC8kwoWE?t=11m30s

Seems it may be related to server->client spam for inventory. I don't think anything we do is going to fix that.

 

While true we can't fix it, but this work around does work.

 

I have played for about 7 hours today and about 13 hours yesterday without a single desync.