To the idiots who thought it would be cute to use the Sylverant DNS resolver to launch DNS-related attacks, you really are not amusing. Thanks to you idiots, the DNS server I host is now locked to only provide the addresses for PSO-related hostnames. I’m also reconsidering whether I should host said DNS or not at this point, since it is obviously more trouble than it is worth. Not that I expect said idiots to ever read this post or anything else anyway.
To those who aren’t amongst the idiots, I guess this needs a bit of explaining… One of the options for connecting to Sylverant with certain versions of PSO for the Dreamcast (Network Trial Edition, USv1, EUv1, EUv2) and all versions of PSO for Gamecube was to use the Sylverant server as your DNS in your network configuration. This works because I host a DNS server that provides the IP addresses for certain PSO-related hostnames that the game uses to try to connect to a server. All of these addresses resolve to the same IP address as the Sylverant server itself. For convenience, the DNS server could also be used for general day-to-day use and with other online games, as it would recursively look up any hostnames it did not know about, and return the correct IP address for said servers by way of (primarily) Google’s Public DNS server. However, someone recently decided it would be a good idea to use this service that I provide (the DNS server) to launch a DNS query amplification attack (see here for more info on what that is). Thus I have had to stop allowing recursive lookups to prevent someone from performing such an attack. What that means is that the Sylverant DNS is now not usable for general day-to-day lookups (not that I expect many people were using their Dreamcasts for web browsing), nor can you use it in your network configuration for playing games like Quake 3 Arena on the Dreamcast any more (which was probably more commonly done).
I highly suggest that anyone playing PSO on the Dreamcast that does not already use the Sylverant PSO Patcher disc consider doing so in the near future. I may end up having to discontinue the DNS service if people continue to abuse it, so I’d like it if everyone was prepared for that possibility.