Hello folks, I'm currently running Proxmox on a host for evaluation as we're looking for an alternative to ESXi/vSphere. The host I'm running the tests on is a baremetal server in a datacenter. The machine has two network interfaces with two public IPs (the machine is "directly connected to the internet"). Let's assume that they are 188.8.131.52 and 184.108.40.206. The gateway is 220.127.116.11. So far I managed to get Proxmox working with a couple of VMs using only one of the NICs of the host and having everything configured to provide internet access to the guets via routing/NAT as shown in the documentation. Now I'd like to pass through the second NIC directly to one of the guests which will act as a virtual router. I thought that I can simply activate the second NIC on the host and "pass it through" via a bridge interface. However, I haven't been successful in giving that virtual router VM internet access so far and I'd like to seek some assistance. Here's my Proxmox host network interfaces configuration file (/etc/network/interfaces): Code: auto lo iface lo inet loopback # Physical interface 0 auto enp5s0 iface enp5s0 inet static address 18.104.22.168 netmask 255.255.255.0 gateway 22.214.171.124 # Virtual interface for NAT 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 enp5s0 -j MASQUERADE post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o enp5s0 -j MASQUERADE # Physical interface 1 auto enp6s0 iface enp6s0 inet static address 126.96.36.199 netmask 255.255.255.0 # Virtual interface for bridging auto vmbr1 iface vmbr1 inet manual bridge_ports enp6s0 bridge_stp off bridge_fd 0 I wanted to post a screenshot of the web interface but the forum doesn't let me as I'm a new user. However, I don't think that it's necessary anyway as the web interface shows pretty much exactly that configuration. My guests are all FreeBSD. However, that shouldn't matter as network configuration is "always the same". The guests that use vmbr0 have no problems connecting to the internet at all. However, the one VM that uses vmbr1 is unable to connect. It's also unable to ping the gateway (188.8.131.52). Here's my FreeBSD network configuration (from /etc/rc.conf): Code: ifconfig_em0="inet 184.108.40.206/24" defaultrouter="220.127.116.11" em0 is the guets network interface (like eth0 on most Linux distributions). According to ifconfig, the network interface on the guest is up and has the correct IP assigned. Could anyone help me out here? What am I missing?