[SOLVED] Iptables NAT does not work on Proxmox 5.2-2 but 5.1 does

[kotakomputer]

I just try Proxmox 5.2-2 but unfortunately Iptables NAT does not work like Proxmox 5.1 does.

# vmbr0: Bridging. Make sure to use only MAC adresses that were assigned to you.
auto vmbr0
iface vmbr0 inet static
        address 10.10.10.1/24
        gateway 10.10.10.254
        bridge_ports enp1s0f0
        bridge_stp off
        bridge_fd 0

auto vmbr2
iface vmbr2 inet static
        address  192.168.0.1
        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 '192.168.0.0/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '192.168.0.0/24' -o vmbr0 -j MASQUERADE

What was changed in the new Proxmox 5.2-2?

root@sds-030:~# pveversion -V
proxmox-ve: 5.2-2 (running kernel: 4.15.17-3-pve)
pve-manager: 5.2-2 (running version: 5.2-2/b1d1c7f4)
pve-kernel-4.15: 5.2-3
pve-kernel-4.15.17-3-pve: 4.15.17-12
corosync: 2.4.2-pve5
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: 1.2-2
libjs-extjs: 6.0.1-2
libpve-access-control: 5.0-8
libpve-apiclient-perl: 2.0-4
libpve-common-perl: 5.0-32
libpve-guest-common-perl: 2.0-16
libpve-http-server-perl: 2.0-9
libpve-storage-perl: 5.0-23
libqb0: 1.0.1-1
lvm2: 2.02.168-pve6
lxc-pve: 3.0.0-3
lxcfs: 3.0.0-1
novnc-pve: 1.0.0-1
proxmox-widget-toolkit: 1.0-18
pve-cluster: 5.0-27
pve-container: 2.0-23
pve-docs: 5.2-4
pve-firewall: 3.0-11
pve-firmware: 2.0-4
pve-ha-manager: 2.0-5
pve-i18n: 1.0-6
pve-libspice-server1: 0.12.8-3
pve-qemu-kvm: 2.11.1-5
pve-xtermjs: 1.0-5
qemu-server: 5.0-27
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3
root@sds-030:~#

 

[kotakomputer]

Fixed. Just change eth name back to old style: eth0, eth1, etc.

nano /etc/default/grub
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"
update-grub

Then ... revised /etc/network/interfaces to eth0.