DDOS hetzner attack warning

Hello, today Hetzner sent me this message saying that I have received a DDOS attack.

When this happened I had rtorrent, rutorrent and subsonic activated.

Can someone help me solve the problem?

Format: ASN | IP | Timestamp (UTC) | RPC response

24940 | 46.4.69.90 | 2020-04-14 06:11:20 | 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp; 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp;

24940 | 46.4.69.101 | 2020-04-14 07:40:32 | 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp; 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp;