I've got dedicated Debian server with Proxmox as KVM manager and such IP example network:
IP address 175.19.59.209
Netmask 255.255.255.224
Gateway 175.19.59.193
Now I'm trying to configure subnets with such topology:
\\\\\\\\\\\\\\\\\\\\\\\\\
\\Gateway 175.19.59.193\\
\\\\\\\\\\\\\\\\\\\\\\\\\
\
+----------+
| KVM-host |
| eth0 |
| vmbr0 |
| vmbr1 |
+----------+
|
| +------+ +------+ +------+
+--| vm01 |----| vm02 |--/ /--| vm09 |
+------+ +------+ +------+
That's how my host machine interface is configurated now:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
auto vmbr0
iface vmbr0 inet static
address 175.19.59.209
netmask 255.255.255.224
gateway 175.19.59.193
bridge_ports eth0
bridge_stp off
bridge_fd 0
auto vmbr1
iface vmbr1 inet static
address 10.10.11.1
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0
And this is guest machine vm01 configuration:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.10.11.12
netmask 255.255.255.0
gateway 10.10.11.1
The problem is that I can't ping vmXX out of host vice versa. Also I have no idea how to route vm01:80 to the Internet and back to make vm01 reverse proxy for 10.10.11.0/24 network.
What have I missed? Any advice for the networking "newby"?
Best Answer
1) Ensure vmbr1 contains the tap devices for each VM:
2) Ensure iptables on the host allows bridge traffic:
3) Ensure you allow NAT via vmbr0: