SMP direct connection IPs do not work

The following IPs used to work last time I tested them, but they no longer work. ogsmp.net og-smp.net Either I get the message "Timed out" or "Network Protocol Error". This occurs on Java 1.21.8 (vanilla client) I have no idea if many players use these IPs (the RPG/Factions ones were promoted, not sure if these were), but this could prevent some players from joining.