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    webfrontend

    additionnel bridge interface doesn't requires ip itself FYI : https://forum.proxmox.com/threads/gui-availability-from-all-nics.67491/post-304166
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    [SOLVED] Virtio drivers Windows 2019 crashing

    HDD or SSD ? How many per host ?
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    High VM-EXIT and Host CPU usage on idle with Windows Server 2025

    is VBS active ? check from msinfo32.exe
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    Proxmox at OVH: Allowing SSH to Failover IPs only via WireGuard VPN

    As VM has its own public ip, they are not connected to PVE network. Allow PVE WAN IP in each VM firewall.
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    Leveling up knowledge - Proxmox FW

    it's not Proxmox related, it's a tcp/ip basis. I've no use case for "sport" neither experience to write an example.
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    Leveling up knowledge - Proxmox FW

    remove "sport" as you often don't control the source port.
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    Full windows Backup - new

    Awesome !
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    PBS with NVME storage way too slow? How to optimize?

    edited on PVE side isn't ? what about 128 concurrency and 16 threads ?
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    PBS with NVME storage way too slow? How to optimize?

    Have you tried tuning above ? CONCURRENCY & THREADS envs ?
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    Backup problems guest-agent 'fs-freeze'

    Monitor within guest as the schedule time (temporary change schedule time)
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    PBS with NVME storage way too slow? How to optimize?

    Network graph displays MB/s instead Mb/s https://forum.proxmox.com/threads/units-of-measure-on-network-traffic-graph.170161/
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    Backup problems guest-agent 'fs-freeze'

    What backup mode for scheduled task ? Snapshot / Suspend / Stop ?
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    PBS with NVME storage way too slow? How to optimize?

    For the Restore process, you can tune settings : https://forum.proxmox.com/threads/abysmally-slow-restore-from-backup.133602/post-784918
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    PBS with NVME storage way too slow? How to optimize?

    PVE version, as restore is PVE side. PVE 8.4 require updates to allow "Restoring from Proxmox Backup Server now fetches multiple chunks concurrently in each worker thread. This can improve the restore performance in setups with fast network connections and disks. The number of concurrently...
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    PBS with NVME storage way too slow? How to optimize?

    What PVE version ?
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    High VM-EXIT and Host CPU usage on idle with Windows Server 2025

    it's expected as it's same OS "binaries", Windows build 26100
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    Nested virtualization: Issues enabling Hyper-V in win server VM

    -hypervisor implies perfs penalty , use it as a last resort.
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    Guest agent not running on Windows 11

    After you discover how it works under the hood, you will follow the recommended way : Local PBS then WAN PBS Remote Sync from. Give a try , I bet on no more QEMU guest agent stopped with a local PBS.
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    Guest agent not running on Windows 11

    Root cause isn't QEMU guest agent itself, others services can fail too. I'd had same problem with too slow HDD on PBS side. Too slow PBS impacts source guest activity , timeout up to crash ( see simulated example here ) Fleecing is mandatory for PBS over WAN.
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    Guest agent not running on Windows 11

    again, sorry for my english wording... Do you get the point of "Stop mode" backup ? "Stop mode" backup is still "live". Fleecing option is mandatory to mitigate. https://forum.proxmox.com/threads/backup-sync-performance-over-vpn.164450/post-835072
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