first of all an explanation of our situation:
We have bought a dedicated server with ESXi already setup and we're in kind of a hurry to get things set up correctly. We're working on the problem and of course are in contact with the support of the provider, but they don't really seem to know what's the problem either.
We have an installed ESXi Server. No configuration at all. We're setting up a "Virtual Machine Port group" so we can create virtual machines at all. We have created a virtual machine running with ubuntu.
IP: 188.8.131.52 SN: 255.255.255.0 GW: 184.108.40.206 Network: 220.127.116.11
Now we bought an ip address that would be 18.104.22.168 and we have to configure our virtual machine (ubuntu) with that address. We've tried many compositions, should be about 30-40 variations at all. Some of them made sense to us, some didn't. One that made most sense to me was the following
Ubuntu virtual machine /etc/network/interfaces :
auto eth0 iface eth0 inet static address 22.214.171.124 netmask 255.255.255.255 post-up ip route add 126.96.36.199/32 dev eth0 post-up ip route add default via 188.8.131.52
But it turned out to not work. We're on this about a week and the support is currently not providing anything helpful at all.
/e: Edited the ip route to be correctly. Was a typo.