Error in updating

[JZF]

Good morning!

I had Windows 10 on my computer and was updating DCS without any problems, but I recently upgraded to Windows 11 and when I tried to update DCS, the following error message appeared: “Curl error (35): SSL connect error.” What does this mean and what is the solution?

Thank you!

Paul

 

 

[silverdevil]

2 hours ago, JZF said:

Curl error (35): SSL connect error.

hello

most likely because of something preventing you from getting to the update server.

three things to try

1. check time and date on your PC. sync with a good source.
2. reset you home network equipment
3. try using a VPN

if these suggestions do not work, come back and we can dive deeper.

[JZF]

Thank you for your prompt response.

I am located in mainland China, so I use a VPN to access Western websites, but even with the VPN active, the error message appears. I just tried updating DCS again and the error message appeared immediately. It seems that the problem is with the servers. Please see the attached file.

BRegards

autoupdate_log.txt

[silverdevil]

18 hours ago, JZF said:

Thank you for your prompt response.

I am located in mainland China, so I use a VPN to access Western websites, but even with the VPN active, the error message appears. I just tried updating DCS again and the error message appeared immediately. It seems that the problem is with the servers. Please see the attached file.

BRegards

hello again,

the servers are not having any issues as far as i know. if there was a system-wide problem, the forums would be blowing up.

00000.337 ERROR: Conection to server 'cdn.digitalcombatsimulator.com' failed: SSL connect error

open a command prompt while VPN is in use and perform the command "nslookup cdn.digitalcombatsimulator.com"

nslookup cdn.digitalcombatsimulator.com
Server:  dns.google
Address:  8.8.8.8

Non-authoritative answer:
Name:    1231349722.rsc.cdn77.org
Addresses:  2a02:6ea0:e200::36
          2a02:6ea0:e200::37
          2a02:6ea0:e200::17
          109.61.91.194
          109.61.91.197
          109.61.91.231
Aliases:  cdn.digitalcombatsimulator.com

you should see similar results. please post your results here.

[JZF]

Good morning,

I followed your steps and obtained the following result:

C:\Users\YH>nslookup cdn.digitalcombatsimulator.com 服务器: 192.168.3.1 Address: 192.168.3.1

非权威应答: 名称: 1231349722.rsc.cdn77.org Addresses: 2a02:6ea0:c800::26 2a02:6ea0:c800::27 2a02:6ea0:c800::32 2a02:6ea0:c800::33 2a02:6ea0:c800::23 2a02:6ea0:c800::24 2a02:6ea0:c800::25 89.187.187.19 89.187.187.11 143.244.51.59 89.187.187.15 89.187.187.4 143.244.51.249 143.244.51.246 Aliases: cdn.digitalcombatsimulator.com

The problem persists, I still can't update DCS.

Tkx

[silverdevil]

2 hours ago, JZF said:

nslookup cdn.digitalcombatsimulator.com 服务器: 192.168.3.1 Address: 192.168.3.1

hello.

your computer is getting DNS automatically from your DHCP server. likely your router. change your DNS to static and use 8.8.8.8 and 8.8.4.4 to test. the IP you received for CDN is incorrect.

this is for WIN10 but is essentially the same steps.

https://www.windowscentral.com/how-change-your-pcs-dns-settings-windows-10

share output of IPCONFIG /ALL from command prompt. 

[JZF]

Good morning,

I tested DNS 8.8.8.8 and 8.8.4.4 but got the same error, so I changed the values to 1.1.1.1 and 1.0.0.1 and the problem was solved. The program started updating DCS, but the download speed was so slow that I ended up giving up. I am located in mainland China. Could that be the problem?

Thank you!

[silverdevil]

8 hours ago, JZF said:

Good morning,

I tested DNS 8.8.8.8 and 8.8.4.4 but got the same error, so I changed the values to 1.1.1.1 and 1.0.0.1 and the problem was solved. The program started updating DCS, but the download speed was so slow that I ended up giving up. I am located in mainland China. Could that be the problem?

Thank you!

being in china should not matter but who knows. are you able to ask your ISP? the speed of the download should not be affected by change in DNS.

your computer would query DNS to get the appropriate IPs for the canonical name CDN...

then DCS will use that DNS to connect to get the updates.

you did this step correct?

"reset you home network equipment"

ISP may have a bad route too. this could cause slowness. but the DNS set to a root server makes your situation confusing.

[JZF]

Good morning,

Yes, I reset my home network, but it didn't solve anything.

Now, even changing the DNS values doesn't help, and the following error message appears:

Should I reinstall the game? Will that solve it?

 

Thank you!

[silverdevil]

5 hours ago, JZF said:

Good morning,

Yes, I reset my home network, but it didn't solve anything.

Now, even changing the DNS values doesn't help, and the following error message appears:

Should I reinstall the game? Will that solve it?

 

Thank you!

hello. sorry to hear you still have troubles. reinstalling will not correct this issue. one never has to reinstall. i repair will do the same and take much less time. you may try to disable IPv6 on your computer. another thing to check is see if you changed HOSTS file. it is located C:\Windows\System32\drivers\etc. open it with notepad. then post contents here. also in command prompt run ipconfig/all again and post that content.

[AG-51_Razor]

I'm getting a "Curl error (52): Server returned nothing (no headers, no data)"

I am in Medford, OR and my computer is showing the correct time and date.

Edited 21 hours ago by AG-51_Razor

[TheGoose]

I'm getting a "Curl error (52): Server returned nothing (no headers, no data)"

Same issue for me

[kontiuka]

Just now, TheGoose said:

I'm getting a "Curl error (52): Server returned nothing (no headers, no data)"

Same issue for me

+1

[Crowman]

I am also unable to update to the latest update dated 17/09/2025 but my error is reporting "not enough disk space in the download folder Need 291248 Mbytes when only 236367 available." what gives. is this an update or a complete install????

[rob10]

2 hours ago, Crowman said:

I am also unable to update to the latest update dated 17/09/2025 but my error is reporting "not enough disk space in the download folder Need 291248 Mbytes when only 236367 available." what gives. is this an update or a complete install????

If you have many maps there is a lot of stuff being updated.  It will replace a bunch of the existing files, but first it has to download and unpack them.  So you won't see that big of increase in total usage after it's done, but it needs a bunch to do the update.

You can remove a map or two to free up space or do a search in the forums for how to use symbolic links to move maps to a different drive to free up space.