Configure Networking in Fedora 28 OVH Proxmox

OVH have special networking requirement. First you need to login OVH and create vMAC for your IP address. Now create VM in Proxmox, during VM creation, specify this vMAC address under Network > MAC.

Once your VM is installed, you don’t have network access. Login to the server using Proxmox Console.

Run following commands

ip addr add FAILOVER_IP dev ens18
ip route add GATEWAY_IP dev ens18
ip route add default via GATEWAY_IP dev ens18

Replace following in above commands

FAILOVER_IP = IP address of your Virtual Machine.

GATEWAY_IP = This is gateway IP addres. This is IP address of your host machine (the server on which proxmox installed). Replace last digit with 254. For example, if your servers main IP is 123.123.123.142, then use 123.123.123.254 as gateway.

Here is an example

ip addr add 158.69.138.120 dev ens18
ip route add 192.95.29.254 dev ens18
ip route add default via 192.95.29.254 dev ens18

At this point, you will be able to login to server using SSH. You may not able to ping outside, for this, you need to edit /etc/resolv.conf and add nameserver entry.

vi /etc/resolv.conf

Add

nameserver 8.8.8.8

To make it permanant, edit

vi /etc/sysconfig/network-scripts/ifcfg-ens18

Find

BOOTPROTO=dhcp

Replace with

BOOTPROTO=static
IPADDR=FAILOVER_IP
GATEWAY=GATEWAY_IP
HWADDR=MY:VI:RT:UA:LM:AC
DNS1=1.1.1.1

Example

[root@ip120 ~]# cat  /etc/sysconfig/network-scripts/ifcfg-ens18
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=158.69.138.120
GATEWAY=192.95.29.254
HWADDR=02:00:00:46:f4:52
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens18
UUID=cf4c9d14-92ec-3475-94e2-797b405ac516
ONBOOT=yes
AUTOCONNECT_PRIORITY=-999
DEVICE=ens18
[root@ip120 ~]# 

For routung, create

vi /etc/sysconfig/network-scripts/ifcfg-ens18-route

GATEWAY_IP - 255.255.255.255 ens18
default GATEWAY_IP

Example

[root@ip120 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens18-route
192.95.29.254 - 255.255.255.255 ens18
default 192.95.29.254
[root@ip120 ~]#