Ubuntu

Ping Ubuntu 22.04 Desktop to Virtual Machine Manager 4.0.0 VM Destination Host Unreachable

Asked by Ken

Goal: Host machine running Virtual Machine Manager to have guest vm router on the LAN. https://i.imgur.com/5bURvD5.png

Host Ubuntu 22.04 Desktop 192.168.1.120 pinging VM router pfSense 192.168.1.1 error: Destination Host Unreachable.

The problem might be between netplan and libvirtd?

[code]
ubuntu@ubuntu:/etc/netplan$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.120 icmp_seq=1 Destination Host Unreachable
[/code]

VMM automatically creates a bridge virbr0 and I don't know how to ignore it and use my created bridges NIC0-br0 and NIC1-br1.
[code]
ubuntu@ubuntu:/etc/netplan$ ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br1 state UP group default qlen 1000
    link/ether 1c:61:b4:6d:38:4f brd ff:ff:ff:ff:ff:ff
    inet6 fe80::31ca:9227:dcb3:d09e/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:88:b4:b4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fe:54:00:33:3c:4b brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe33:3c4b/64 scope link
       valid_lft forever preferred_lft forever
8: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fe:54:00:50:81:3f brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe50:813f/64 scope link
       valid_lft forever preferred_lft forever
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 0a:d4:78:1f:cd:41 brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 brd 100.127.255.255 scope global dynamic noprefixroute br0
       valid_lft 294sec preferred_lft 294sec
    inet6 2406:2d40:4100:8fb2:19c5:376e:1317:8ae1/64 scope global temporary dynamic
       valid_lft 197sec preferred_lft 47sec
    inet6 2406:2d40:4100:8fb2:8d4:78ff:fe1f:cd41/64 scope global dynamic mngtmpaddr
       valid_lft 197sec preferred_lft 47sec
    inet6 fe80::8d4:78ff:fe1f:cd41/64 scope link
       valid_lft forever preferred_lft forever
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether d2:da:46:a2:b2:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global noprefixroute br1
       valid_lft forever preferred_lft forever
    inet6 fe80::d0da:46ff:fea2:b23e/64 scope link
       valid_lft forever preferred_lft forever
[/code]

Bridges I created:
[code]
ubuntu@ubuntu:/etc/netplan$ bridge link
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 4
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100
[/code]

NetworkManager configuration file:
[code]
ubuntu@ubuntu:/etc/netplan$ cat 01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp2s0:
      dhcp4: true
    enp3s0:
      dhcp4: true
  bridges:
    br0:
      dhcp4: true
      interfaces:
        - enp3s0
    br1:
      dhcp4: false
      addresses: [192.168.1.120/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8,8.8.8.4]
      interfaces:
        - enp2s0
[/code]

Routes:
[code]
ubuntu@ubuntu:/etc/netplan$ ip r
default via 100.64.0.1 dev br0 proto dhcp metric 425
default via 192.168.1.1 dev br1 proto static metric 20426
34.120.255.244 dev br0 proto dhcp scope link metric 425
100.64.0.0/10 dev br0 proto kernel scope link src 100.76.25.213 metric 425
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown
192.168.1.0/24 dev br1 proto kernel scope link src 192.168.1.120 metric 426
192.168.100.1 dev br0 proto dhcp scope link metric 425
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
[/code]

Not sure if there's an iptables issue?
[code]
ubuntu@ubuntu:/etc/netplan$ sudo iptables -n -t nat -L
[sudo] password for ubuntu:
Chain PREROUTING (policy ACCEPT)
target prot opt source destination

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
LIBVIRT_PRT all -- 0.0.0.0/0 0.0.0.0/0

Chain LIBVIRT_PRT (1 references)
target prot opt source destination
RETURN all -- 192.168.122.0/24 224.0.0.0/24
RETURN all -- 192.168.122.0/24 255.255.255.255
MASQUERADE tcp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535
MASQUERADE udp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535
MASQUERADE all -- 192.168.122.0/24 !192.168.122.0/24
[/code]

Question information

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Solved by:
Ken
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Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

Are you using a bridged network in the setting of the virtualbox?

Revision history for this message
Ken (kotgc) said : 		#2

The Hypervisor called Virtual Machine Manager 4.0.0 is bridged, see:
[code]
ubuntu@ubuntu:/etc/netplan$ bridge link
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 4
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100
[/code]

I've reinstalled the Ubuntu 22.04, VMM 4.0.0 and VM pfSense.
Ubuntu 192.168.1.120 pings the Internet (very slow connection though), vm router and LAN devices.
VM router 192.168.1.1 pings Ubuntu and LAN devices, however not the Internet.
This tells me Internet is running via the Ubuntu 22.04 iptables, rather than via the vm router.
Somehow I think I'm missing bridging the WAN interface NIC0-br0-vm router?
Here's my latest configuration:

root@ubuntu:/etc/netplan# cat 50-cloud-init.yaml
network:
  version: 2
  renderer: networkd

  ethernets:
    enp2s0:
      dhcp4: false
      dhcp6: false
    enp3s0:
      dhcp4: false
      dhcp6: false

  bridges:
    br0:
      interfaces: [enp3s0]
      dhcp4: true
      dhcp6: true
    br1:
      interfaces: [enp2s0]
      addresses: [192.168.1.120/24]
      # gateway4 is deprecated, use routes instead.
      routes:
      - to: default
        via: 192.168.1.1
        metric: 100
        on-link: true
      mtu: 1500
      nameservers:
        addresses: [8.8.8.8]
      parameters:
        stp: true
        forward-delay: 4
      dhcp4: no
      dhcp6: no
root@ubuntu:/etc/netplan# ip -c a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br1 state UP group default qlen 1000
    link/ether 1c:61:b4:6d:38:4f brd ff:ff:ff:ff:ff:ff
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether a8:a1:59:6e:1f:8b brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:a9:81:30 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
8: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:d4:d4:20 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fed4:d420/64 scope link
       valid_lft forever preferred_lft forever
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether e2:73:dd:ac:ba:e0 brd ff:ff:ff:ff:ff:ff
    inet 100.76.25.213/10 metric 100 brd 100.127.255.255 scope global dynamic br0
       valid_lft 187sec preferred_lft 187sec
    inet6 2406:2d40:4100:8fb2:e073:ddff:feac:bae0/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 233sec preferred_lft 83sec
    inet6 fe80::e073:ddff:feac:bae0/64 scope link
       valid_lft forever preferred_lft forever
10: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ce:08:2f:30:4a:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.120/24 brd 192.168.1.255 scope global br1
       valid_lft forever preferred_lft forever
    inet6 fe80::cc08:2fff:fe30:4a71/64 scope link
       valid_lft forever preferred_lft forever
11: vnet4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br1 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:95:1e:e5 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fe95:1ee5/64 scope link
       valid_lft forever preferred_lft forever
root@ubuntu:/etc/netplan# ip r
default via 192.168.1.1 dev br1 proto static metric 100 onlink
default via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100
1.1.1.1 via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100
8.8.8.8 via 100.64.0.1 dev br0 proto dhcp src 100.76.25.213 metric 100
34.120.255.244 dev br0 proto dhcp scope link src 100.76.25.213 metric 100
100.64.0.0/10 dev br0 proto kernel scope link src 100.76.25.213 metric 100
100.64.0.1 dev br0 proto dhcp scope link src 100.76.25.213 metric 100
169.254.0.0/16 dev virbr0 scope link metric 1000 linkdown
192.168.1.0/24 dev br1 proto kernel scope link src 192.168.1.120
192.168.100.1 dev br0 proto dhcp scope link src 100.76.25.213 metric 100
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
root@ubuntu:/etc/netplan# bridge link
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 4
3: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 4
8: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100
11: vnet4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br1 state forwarding priority 32 cost 100

Any suggestions, as if I disable the br0's DHCP, it must need some address for a static IP?
How do I check the vm router is connected to br0?
How do I connect the vm router to br0?
How do I check the vm router's WAN is on DHCP? The vm router's Interfaces: [WAN] IPv4 Configuration Type, does say it's on DHCP, so this should be ok?

Revision history for this message
Ken (kotgc) said : 		#3

This is solved, by using no TUI, only GUI.