[SOLVED] Mobile Proxmox networking with travel router - help

S

Soogs

Member
Jul 11, 2023
24
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I've setup Proxmox on Debian Desktop environment.

Working:
  • DE connects to wifi (travel router or any other wifi) and can function as a DE.
  • Wifi connection is forwarded to PVE (ipv4 forwarding, dnsmaque enabled).
  • I can reach guests from the laptop/host.
Not working:
  • Clients connected to the travel router cannot access the guest machines.
Config:
  • dnsmaque - dhcp for proxmox guests 192.168.100.50 - 192.168.100.199
  • vmbr0 IP 192.168.100.1 (no gateway assigned)
  • travel router subnet 192.168.64.0/24
Issue:
  • unable to get guests talking with clients on travel router.
What I've tried:
  • setting vmbr1 to 192.168.64.x
    • pve/host cannot access router admin
    • clients on travel router cannot access guest machines
    • clients on travel router can still access router admin
  • Changing the travel router to 192.168.100.0 subnet and keeping dhcp above that what is set in PVE
    • same issue as above
    • breaks internet for host/pve
I do have OPNsense virtual machine available if this would help with this scenario.

Is what I want to do achievable? or am I chasing a losing battle?
If I have missed out any useful data/info please let me know

Thanks
 
Soogs said:
I've setup Proxmox on Debian Desktop environment.

Working:
  • DE connects to wifi (travel router or any other wifi) and can function as a DE.
  • Wifi connection is forwarded to PVE (ipv4 forwarding, dnsmaque enabled).
  • I can reach guests from the laptop/host.
Not working:
  • Clients connected to the travel router cannot access the guest machines.
Config:
  • dnsmaque - dhcp for proxmox guests 192.168.100.50 - 192.168.100.199
  • vmbr0 IP 192.168.100.1 (no gateway assigned)
  • travel router subnet 192.168.64.0/24
Issue:
  • unable to get guests talking with clients on travel router.
What I've tried:
  • setting vmbr1 to 192.168.64.x
    • pve/host cannot access router admin
    • clients on travel router cannot access guest machines
    • clients on travel router can still access router admin
  • Changing the travel router to 192.168.100.0 subnet and keeping dhcp above that what is set in PVE
    • same issue as above
    • breaks internet for host/pve
I do have OPNsense virtual machine available if this would help with this scenario.

Is what I want to do achievable? or am I chasing a losing battle?
If I have missed out any useful data/info please let me know

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Thanks
Click to expand...
hmm..interesting
 
Last edited:
Yes, what you want is achievable, but the issue is that your Proxmox guests 10.10.10.1 and the travel router clients are on different subnets without proper routing between them. Currently, the guests are on 192.168.100.0/24 (vmbr0) and the travel router is on 192.168.64.0/24, so devices on the travel router subnet cannot reach the guests, and vice versa. Assigning vmbr1 to 192.168.64.x won’t work because the host isn’t routing traffic between interfaces. A practical solution is to use your OPNsense VM as a router/firewall: connect vmbr0 to the guests’ subnet and vmbr1 to the travel router subnet, then configure OPNsense to route between the two networks and enable NAT if needed.
 
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