I reached out to Noping about the server connectivity problem and here's what they replied.
Currently, using NoPing with the EuroAion private server is not feasible.
Recently, EuroAion's datacenter was hit by multiple DDoS attacks and so, the game admins decided to implement an Anti-DDoS protection (StormWall) on their infrastructure. Unfortunately, this protection is automatically blocking all connections from NoPing servers/datacenters.
Our dev team made numerous checks and attempted fixes on our side to connect to the game host, bypassing these blocks. Sadly, our team confirmed that there's nothing we can do right now, since the anti-DDoS system is creating these blocks for the IPs linked with NoPing's servers/datacenters, preventing NoPing from establishing a connection with the game client.
Anyone got a workaround or suggestion?
On a side note, I'm testing Aion Riftshade, launching in Q1 2026. With their premium EU hosting and strong anti-DDoS protection, connection is solid at 15ms across EU without the need for NoPing or ExitLag.