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I am currently facing the same problem,and adding an allow dns/53 rule to ufw from and to the VMs' IP range is not helping. What you have done is the same as disabling ufw :)

I accidentally modified/destroyed the dns_namecheap script. is there any way to replace it or recover the data as it was? I can't undo my changes since I deleted the backup file that I created (wanted to remove the modified file and used keyboard completion and deleted the backup file :( )...

No, they are all in the same IOMMU-Groups (16:00.x)

Hi Sebastian, thanks for your reply. i tried that, unfortunately as soon as I started the VM the proxmox lost ip connectivity. till now I tied every time just passing through the 16:00.3, and Proxmox use 16:00.0 for his IP connectivity. have you face such problem, or do you believe that the...

I do have a spare Card which has tow Ports, will give it a shot, hope that solves my problem, Thank you for your time and ipnut :) ill mark this threat as solved, since apperently there is no way to regroup the onboard cards in seprated iommu_groups

with the current Setup, whenever I start the VM( click on the start button) the whole server crash, with no sign, I see no changes on the proxmox Prompt, but the VM is not pingable anymore and Web-UI get unreachable, but when I connect a monitor the server I could see the Proxmox logging prompt...

just find out that the Ethernets are all in the same group, find /sys/kernel/iommu_groups/ -type l | grep 16:00 /sys/kernel/iommu_groups/19/devices/0000:16:00.3 /sys/kernel/iommu_groups/19/devices/0000:16:00.1 /sys/kernel/iommu_groups/19/devices/0000:16:00.2...

Hi, all who read this post :) since two/three days I'm struggling with PCI Passthrough, my Server has 4 Onboard NICs (Ethernet Cards) and I want to Pass two of them to my VM. IOMMU is alredy enabled dmesg | grep -e DMAR -e IOMMU [ 0.014209] ACPI: DMAR 0x000000007B7BC000 0000B8 (v01 LENOVO...