Upload to Nextcloud freezes when file larger 100 MB

[SRaudi]

Hello,

i have a strange behavior. We have a nextcloud in a DMZ. The DMZ uses a 192.168.x network and a Virtual IP on the WAN is configured for the Nextcloud.

From the LAN we access the Nextcloud with the 192.168.x address directly.

When trying to uplad a file from WAN that is larger than 100 MB the upload freezes at perhaps 10%. When uploading a 99 MB file the upload works with no problems.

When uploading from LAN, i'm able to upload files larger than 700 MB without problems.

So in my view it can't be a problem with the Nextcloud.

I'm trying to upload from my home and i'm at the same provider, i have only 5 hops to the destination, but from other sources have the same problem.

What can i check on the Fortigate, to search for the source of this problem?

I have done already a packet trace and a debug flow trace, but here i wasn't able to see a problem, only that the packets stops after a few sec.

Thank you!

[AEK · Accepted solution]

Hi SRaudi

Is the firewall rule in proxy based inspection mode?

If so then, as a troubleshooting step, try with flow based inspection mode and see if it fixes the issue.

[SRaudi]

Hi,

yes it is in proxy mode, okay i will test this, thank you!

And i just noticed, it is no virtual IP it is with a virtual server configured...

Stefan

[SRaudi]

Hi,

i just made a test, created a new policy with flow based and virtual ip. I was able to upload large files and it was so fast.

Thank you for that hint!

Stefan