Help with multiple IPS in Proxmox

akaemu

Hello.

Can anybody point me in to the right direction of how to get a proxmox kvm guest network working with additional ips outside of the main subnet?

Server main IP: 208.100.2X.XX
Server gateway: 208.100.2X.XX
Additional IPS planning to use for personal VMS: 208.100.4X.XX

Configs as of now
Proxmox Server:

auto lo
iface lo inet loopback

auto enp2s0
iface enp2s0 inet static
address 208.100.2X.XX
netmask 255.255.255.224
gateway 208.100.2X.XX
post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up echo 1 > /proc/sys/net/ipv4/conf/enp2s0/proxy_arp

auto vmbr0
iface vmbr0 inet static
address 208.100.4X.XX
netmask 255.255.255.255
bridge_ports none
bridge_stp off
bridge_fd 0

iface enp3s0 inet manual

Proxmox KVM Guest: (Ive experimented with multiple trials but this is the latest attempt)

auto ens18
iface ens18 inet static
address 208.100.4X.XX
netmask 255.255.255.255
post-up ip route add 208.100.2X.XX dev ens18
post-up ip route add default via 208.100.2X.XX
pre-down ip route del default via 208.100.2X.XX
pre-down ip route del 208.100.2X.XX

Thanks!

FAT32

Do you tried to work on enp3s0?

auto enp3s0
iface enp3s0 inet static
address 208.100.4X.XX
netmask 255.255.255.X
gateway 208.100.4X.XX

EDIT: I don't know about your network setup and how the IPs are provided so this is just a wild guess

akaemu

enp3s0 should be disabled.. i dont believe there is a cable ran to it anyway. Also they did not give me a gateway for the additional ip range (208.100.4X.XX). I need to somehow route those IPS via the main ip or the main gateway i think.

FAT32

Can you use the IP: 208.100.4X.XX in your host machine?

akaemu

Yes, the first additional ip is the vmbr0 ip on the host and is pingable from outside. I did that following the proxmox routed ip wiki. That was not the default proxmox install config.

akaemu

Got it working using the hetzner guide, even though this is not a hetzner server.

eol

@akaemu said:
Got it working using the hetzner guide, even though this is not a hetzner server.

You did well mentioning Hetzner twice.

akaemu

Thanks eol. 😂🏳️‍🌈