[SOLVED] Windows VM - no connection

[Azunai]

Hello everyone,
I just installed my pve 6.3-2 like this
https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_Buster
followed by this
https://pve.proxmox.com/wiki/Windows_2019_guest_best_practices

Since i only have 1 IP i choose the NAT setup explained here
https://pve.proxmox.com/wiki/Networ...ith_tt_span_class_monospaced_iptables_span_tt

my pve hosts /etc/network/interfaces file looks like this:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eno1
iface eno1 inet dhcp


auto vmbr0
iface vmbr0 inet static
        address  10.10.10.1
        netmask  255.255.255.0
        bridge-ports none
        bridge-stp off
        bridge-fd 0

        post-up   echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up   iptables -t nat -A POSTROUTING -s '10.10.10.0/24' -o eno1 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o eno1 -j MASQUERADE

        #In some masquerade setups with firewall enabled, conntrack zones might be needed for outgoing connections. Otherwise the firewall could
        #post-up   iptables -t raw -I PREROUTING -i fwbr+ -j CT --zone 1
        #post-down iptables -t raw -D PREROUTING -i fwbr+ -j CT --zone 1

# This is an autoconfigured IPv6 interface
iface eno1 inet6 auto

my VMs config:

 qm config 100
agent: 1
balloon: 16384
boot: order=scsi0;ide2;net0
cores: 16
ide2: local:iso/SW_DVD9_Win_Server_STD_CORE_2019_1809.9_64Bit_German_DC_STD_MLF_X22-45000.ISO,media=cdrom,size=5384746K
ide3: local:iso/virtio-win-0.1.185.iso,media=cdrom,size=402812K
memory: 32768
name: testvm
net0: virtio=66:CC:42:C4:B8:11,bridge=vmbr0,firewall=1
numa: 0
ostype: win10
scsi0: local:100/vm-100-disk-0.qcow2,cache=writeback,discard=on,size=500G
scsihw: virtio-scsi-pci
smbios1: uuid=6ff613b4-2598-4f88-8534-651be39a8fd6
sockets: 1
vmgenid: 29f953ed-51fa-4560-b83a-304b8d3fddb8

within my windows VM network shows:

i also tried a static ip:


i can not ping from the host to the gues and not from the guest to the host, both times i get destination host unreachable
i have not touched any firewall settings on the pve, neither on the node nor the vms

 

[Azunai]

I have no idea what changed, i literaly just gave the server a day off and now the windows VM is fine...

 

[xzizka]

I had exactly the same issue and exactly the same solution. Just wait a day and everything was OK then.

Not sure, where can be the issue. Maybe because I installed Proxmox inside a VM (VMware)?