A temporary change has been implemented by our Dallas DDoS mitigation provider, CosmicGuard, that means that any IP that didn't already have rules on it, now has rules automatically applied to it based on the ports used within the last 24 hours, any other ports will be dropped (including those with very low traffic levels). ICMP (ping) has been dropped. If an IP did have rules already on it (such as allowing/dropping ports/applying filters) then this IP is unaffected by these changes. If you need any ports whitelisted or ICMP allowed, let us know via the usual contact methods. This will only be a temporary measure during large attacks and will be lifted automatically afterwards, it will likely no longer be needed in the coming days.