I am running an Ubuntu 20.04 LTS Focal Server and am tying to stand up VMs on the server using Multipass. I am able to successfully launch VMs and can ssh to them from the server. However I am unable to establish an ssh session from my laptop and presumably any other traffic.
I followed this post, but haven't picked out any details that will help me yet. Here are some pertinent details I've already attempted with the setup. How to route all VM traffic through specific physical interface over a Linux bridge?
The Multipass VMs are running on subnet 10.23.128.0/24. My server's IP is 192.168.2.127. The server's routing table is:
$ ip route
default via 192.168.2.1 dev eno1 proto dhcp metric 100
10.23.128.0/24 dev mpqemubr0 proto kernel scope link src 10.23.128.1
169.254.0.0/16 dev mpqemubr0 scope link metric 1000
192.168.2.0/24 dev eno1 proto kernel scope link src 192.168.2.127 metric 100
This is my Multipass bridge configuration:
ip addr show mpqemubr0
4: mpqemubr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 52:54:00:ed:70:2e brd ff:ff:ff:ff:ff:ff
inet 10.23.128.1/24 brd 10.23.128.255 scope global mpqemubr0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:feed:702e/64 scope link
valid_lft forever preferred_lft forever
I have created a static route on my router that should route traffic on my 192.168.2.0/24 subnet to 192.168.2.127:
$ ip route show table static
10.23.128.0/24 via 192.168.2.127 dev br0
When I traceroute from my router, I get:
$ traceroute 10.23.128.80
traceroute to 10.23.128.80 (10.23.128.80), 30 hops max, 60 byte packets
1 192.168.2.127 (192.168.2.127) 0.397 ms 0.232 ms 0.281 ms
2 192.168.2.127 (192.168.2.127) 0.210 ms 0.171 ms 0.176 ms
I think I have most everything setup, but I believe I'm missing something on my Ubuntu server. When I check cat /proc/sys/net/ipv4/ip_forward the value is 1.
I appreciate any assistance that you can provide.
