You didn’t explain that you had multiple disjoint private networks.
I think you need to give a much more detailed explanation of your network.
What does VDS stand for?
ISP isn’t actually going to be your ISP, but possibly part of the infrastructure; basically this network is complicate and it needs a lot of detail to properly understand it.
A local network with only one address looks wrong. I’m not sure if it will be accepted.
You don’t seem to have said what should be in the Contact header; potentially you may need multiple type=transport sections, which will mean using custom configurations.
