Hi there!
In a few days from now (2020-04-13), the CloudVPS network will see a change happening that will likely go unnoticed, but it is important enough to share it with you beforehand.
We will be changing the IPv4 address that we use as the main source NAT for egress connections (initiated in the VM instances). This change won't affect VM instances using floating IPs.
Old IP address: 185.15.56.1 New IP address: 208.80.155.92
If you know of anywhere (a firewall, ACL or any other mechanism) that had this address hardcoded, you will need to update it.
See this wikitech page for more details:
https://wikitech.wikimedia.org/wiki/News/CloudVPS_NAT_change
Please reach out if you have any doubts, questions, or any other issue.
regards.