Cloudflare making hundreds of connections to FTP server

We run several services (FTP on port 21, SSH on port 22, HTTP on port 80, etc.) on a public IP address. Today we have been seeing hundreds of connections to our FTP server from AS13335 CLOUDFLARENET.

The rate began very high (almost 500 connections in 15 minutes) but the rate has decreased significantly. It is always 5 connections from each IP address and no FTP commands are sent. Initially I thought they were port scans. However the connections are only on port 21. Any idea what Cloudflare wants with our FTP server? MaxMind GeoIP shows the IP addresses as being from all of the world.

Parial log below. Full log at https://pastebin.com/raw/6eYAHavn due to character limit.

+-------------------------+------+--------------+---------+---------------+-------------------+-----------------------+
| timestamp               | port | ip           | as_num  | as_org        | city              | country               |
+-------------------------+------+--------------+---------+---------------+-------------------+-----------------------+
| 2020-11-30 19:20:17.863 | 21   | 8.45.151.109 | AS13335 | CLOUDFLARENET | Seattle           | United States         |
| 2020-11-30 19:20:17.896 | 21   | 8.45.151.109 | AS13335 | CLOUDFLARENET | Seattle           | United States         |
| 2020-11-30 19:20:17.921 | 21   | 8.45.151.109 | AS13335 | CLOUDFLARENET | Seattle           | United States         |
| 2020-11-30 19:20:17.955 | 21   | 8.45.151.109 | AS13335 | CLOUDFLARENET | Seattle           | United States         |
| 2020-11-30 19:20:17.980 | 21   | 8.45.151.109 | AS13335 | CLOUDFLARENET | Seattle           | United States         |
| 2020-11-30 19:20:44.057 | 21   | 8.44.60.38   | AS13335 | CLOUDFLARENET | Vancouver         | Canada                |
| 2020-11-30 19:20:44.370 | 21   | 8.44.60.38   | AS13335 | CLOUDFLARENET | Vancouver         | Canada                |
| 2020-11-30 19:20:44.374 | 21   | 8.44.60.38   | AS13335 | CLOUDFLARENET | Vancouver         | Canada                |
| 2020-11-30 19:20:44.377 | 21   | 8.44.60.38   | AS13335 | CLOUDFLARENET | Vancouver         | Canada                |
| 2020-11-30 19:20:44.380 | 21   | 8.44.60.38   | AS13335 | CLOUDFLARENET | Vancouver         | Canada                |
| 2020-11-30 19:21:54.130 | 21   | 8.45.45.30   | AS13335 | CLOUDFLARENET | Portland          | United States         |
| 2020-11-30 19:21:55.378 | 21   | 8.45.45.30   | AS13335 | CLOUDFLARENET | Portland          | United States         |
| 2020-11-30 19:21:55.381 | 21   | 8.45.45.30   | AS13335 | CLOUDFLARENET | Portland          | United States         |
| 2020-11-30 19:21:55.383 | 21   | 8.45.45.30   | AS13335 | CLOUDFLARENET | Portland          | United States         |
| 2020-11-30 19:21:55.386 | 21   | 8.45.45.30   | AS13335 | CLOUDFLARENET | Portland          | United States         |
| 2020-11-30 19:22:30.658 | 21   | 8.47.15.12   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:22:30.673 | 21   | 8.47.15.12   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:22:30.689 | 21   | 8.47.15.12   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:22:30.704 | 21   | 8.47.15.12   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:22:30.720 | 21   | 8.47.15.12   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:22:45.185 | 21   | 8.45.42.19   | AS13335 | CLOUDFLARENET | San Leandro       | United States         |
| 2020-11-30 19:22:45.192 | 21   | 8.45.42.19   | AS13335 | CLOUDFLARENET | San Leandro       | United States         |
| 2020-11-30 19:22:45.198 | 21   | 8.45.42.19   | AS13335 | CLOUDFLARENET | San Leandro       | United States         |
| 2020-11-30 19:22:45.205 | 21   | 8.45.42.19   | AS13335 | CLOUDFLARENET | San Leandro       | United States         |
| 2020-11-30 19:22:45.211 | 21   | 8.45.42.19   | AS13335 | CLOUDFLARENET | San Leandro       | United States         |
| 2020-11-30 19:23:31.379 | 21   | 8.46.117.7   | AS13335 | CLOUDFLARENET | Calgary           | Canada                |
| 2020-11-30 19:23:31.416 | 21   | 8.46.117.7   | AS13335 | CLOUDFLARENET | Calgary           | Canada                |
| 2020-11-30 19:23:31.453 | 21   | 8.46.117.7   | AS13335 | CLOUDFLARENET | Calgary           | Canada                |
| 2020-11-30 19:23:31.490 | 21   | 8.46.117.7   | AS13335 | CLOUDFLARENET | Calgary           | Canada                |
| 2020-11-30 19:23:31.527 | 21   | 8.46.117.7   | AS13335 | CLOUDFLARENET | Calgary           | Canada                |
| 2020-11-30 19:23:35.018 | 21   | 8.45.47.33   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:23:35.040 | 21   | 8.45.47.33   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:23:35.062 | 21   | 8.45.47.33   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:23:35.084 | 21   | 8.45.47.33   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:23:35.106 | 21   | 8.45.47.33   | AS13335 | CLOUDFLARENET | Phoenix           | United States         |
| 2020-11-30 19:23:48.599 | 21   | 8.45.43.7    | AS13335 | CLOUDFLARENET | Sacramento        | United States         |
| 2020-11-30 19:23:48.605 | 21   | 8.45.43.7    | AS13335 | CLOUDFLARENET | Sacramento        | United States         |
| 2020-11-30 19:23:48.615 | 21   | 8.45.43.7    | AS13335 | CLOUDFLARENET | Sacramento        | United States         |
| 2020-11-30 19:23:48.630 | 21   | 8.45.43.7    | AS13335 | CLOUDFLARENET | Sacramento        | United States         |
| 2020-11-30 19:23:48.643 | 21   | 8.45.43.7    | AS13335 | CLOUDFLARENET | Sacramento        | United States         |
| 2020-11-30 19:24:06.788 | 21   | 8.45.146.22  | AS13335 | CLOUDFLARENET | San Diego         | United States         |
| 2020-11-30 19:24:06.806 | 21   | 8.45.146.22  | AS13335 | CLOUDFLARENET | San Diego         | United States         |
| 2020-11-30 19:24:06.824 | 21   | 8.45.146.22  | AS13335 | CLOUDFLARENET | San Diego         | United States         |
| 2020-11-30 19:24:06.843 | 21   | 8.45.146.22  | AS13335 | CLOUDFLARENET | San Diego         | United States         |
| 2020-11-30 19:24:06.862 | 21   | 8.45.146.22  | AS13335 | CLOUDFLARENET | San Diego         | United States         |
| 2020-11-30 19:24:07.315 | 21   | 8.47.71.18   | AS13335 | CLOUDFLARENET | Las Vegas         | United States         |
| 2020-11-30 19:24:07.391 | 21   | 8.47.71.18   | AS13335 | CLOUDFLARENET | Las Vegas         | United States         |
| 2020-11-30 19:24:07.454 | 21   | 8.45.145.7   | AS13335 | CLOUDFLARENET | Salt Lake City    | United States         |
| 2020-11-30 19:24:07.508 | 21   | 8.47.71.18   | AS13335 | CLOUDFLARENET | Las Vegas         | United States         |
| 2020-11-30 19:24:07.512 | 21   | 8.45.145.7   | AS13335 | CLOUDFLARENET | Salt Lake City    | United States         |
| 2020-11-30 19:24:07.515 | 21   | 8.47.71.18   | AS13335 | CLOUDFLARENET | Las Vegas         | United States         |
| 2020-11-30 19:24:07.518 | 21   | 8.45.145.7   | AS13335 | CLOUDFLARENET | Salt Lake City    | United States         |
| 2020-11-30 19:24:07.521 | 21   | 8.47.71.18   | AS13335 | CLOUDFLARENET | Las Vegas         | United States         |
| 2020-11-30 19:24:07.644 | 21   | 8.45.145.7   | AS13335 | CLOUDFLARENET | Salt Lake City    | United States         |
| 2020-11-30 19:24:07.667 | 21   | 8.45.145.7   | AS13335 | CLOUDFLARENET | Salt Lake City    | United States         |
| 2020-11-30 19:24:26.341 | 21   | 8.44.62.8    | AS13335 | CLOUDFLARENET | Saskatoon         | Canada                |
| 2020-11-30 19:24:26.388 | 21   | 8.44.62.8    | AS13335 | CLOUDFLARENET | Saskatoon         | Canada                |
| 2020-11-30 19:24:26.436 | 21   | 8.44.62.8    | AS13335 | CLOUDFLARENET | Saskatoon         | Canada                |
| 2020-11-30 19:24:26.484 | 21   | 8.44.62.8    | AS13335 | CLOUDFLARENET | Saskatoon         | Canada                |
| 2020-11-30 19:24:26.532 | 21   | 8.44.62.8    | AS13335 | CLOUDFLARENET | Saskatoon         | Canada                |
| 2020-11-30 19:25:06.777 | 21   | 8.48.134.23  | AS13335 | CLOUDFLARENET | Denver            | United States         |
| 2020-11-30 19:25:06.809 | 21   | 8.48.134.23  | AS13335 | CLOUDFLARENET | Denver            | United States         |
| 2020-11-30 19:25:06.842 | 21   | 8.48.134.23  | AS13335 | CLOUDFLARENET | Denver            | United States         |
| 2020-11-30 19:25:06.874 | 21   | 8.48.134.23  | AS13335 | CLOUDFLARENET | Denver            | United States         |
| 2020-11-30 19:25:06.907 | 21   | 8.48.134.23  | AS13335 | CLOUDFLARENET | Denver            | United States         |
| 2020-11-30 19:26:26.987 | 21   | 8.45.147.20  | AS13335 | CLOUDFLARENET | St Louis          | United States         |
| 2020-11-30 19:26:26.999 | 21   | 8.45.147.20  | AS13335 | CLOUDFLARENET | St Louis          | United States         |
| 2020-11-30 19:26:27.047 | 21   | 8.45.147.20  | AS13335 | CLOUDFLARENET | St Louis          | United States         |
| 2020-11-30 19:26:27.095 | 21   | 8.45.147.20  | AS13335 | CLOUDFLARENET | St Louis          | United States         |
| 2020-11-30 19:26:27.142 | 21   | 8.45.147.20  | AS13335 | CLOUDFLARENET | St Louis          | United States         |
| 2020-11-30 19:26:31.508 | 21   | 8.44.63.25   | AS13335 | CLOUDFLARENET | Toronto           | Canada                |
| 2020-11-30 19:26:31.574 | 21   | 8.44.63.25   | AS13335 | CLOUDFLARENET | Toronto           | Canada                |
| 2020-11-30 19:26:31.641 | 21   | 8.44.63.25   | AS13335 | CLOUDFLARENET | Toronto           | Canada                |
| 2020-11-30 19:26:31.707 | 21   | 8.44.63.25   | AS13335 | CLOUDFLARENET | Toronto           | Canada                |
| 2020-11-30 19:26:31.773 | 21   | 8.44.63.25   | AS13335 | CLOUDFLARENET | Toronto           | Canada                |
| 2020-11-30 19:26:41.052 | 21   | 8.47.9.10    | AS13335 | CLOUDFLARENET | Kansas City       | United States         |
| 2020-11-30 19:26:41.100 | 21   | 8.47.9.10    | AS13335 | CLOUDFLARENET | Kansas City       | United States         |
| 2020-11-30 19:26:41.148 | 21   | 8.47.9.10    | AS13335 | CLOUDFLARENET | Kansas City       | United States         |
| 2020-11-30 19:26:41.197 | 21   | 8.47.9.10    | AS13335 | CLOUDFLARENET | Kansas City       | United States         |
| 2020-11-30 19:26:41.245 | 21   | 8.47.9.10    | AS13335 | CLOUDFLARENET | Kansas City       | United States         |
| 2020-11-30 19:26:49.745 | 21   | 8.48.132.32  | AS13335 | CLOUDFLARENET | Houston           | United States         |
| 2020-11-30 19:26:49.795 | 21   | 8.48.132.32  | AS13335 | CLOUDFLARENET | Houston           | United States         |
| 2020-11-30 19:26:49.844 | 21   | 8.48.132.32  | AS13335 | CLOUDFLARENET | Houston           | United States         |
| 2020-11-30 19:26:49.893 | 21   | 8.48.132.32  | AS13335 | CLOUDFLARENET | Houston           | United States         |
| 2020-11-30 19:26:49.942 | 21   | 8.48.132.32  | AS13335 | CLOUDFLARENET | Houston           | United States         |
| 2020-11-30 19:27:15.294 | 21   | 8.46.118.28  | AS13335 | CLOUDFLARENET | Montreal          | Canada                |
| 2020-11-30 19:27:15.321 | 21   | 8.45.111.15  | AS13335 | CLOUDFLARENET | Indianapolis      | United States         |
| 2020-11-30 19:27:15.377 | 21   | 8.46.118.28  | AS13335 | CLOUDFLARENET | Montreal          | Canada                |
| 2020-11-30 19:27:15.384 | 21   | 8.45.111.15  | AS13335 | CLOUDFLARENET | Indianapolis      | United States         |
| 2020-11-30 19:27:15.448 | 21   | 8.45.111.15  | AS13335 | CLOUDFLARENET | Indianapolis      | United States         |
| 2020-11-30 19:27:15.458 | 21   | 8.46.118.28  | AS13335 | CLOUDFLARENET | Montreal          | Canada                |
| 2020-11-30 19:27:15.511 | 21   | 8.45.111.15  | AS13335 | CLOUDFLARENET | Indianapolis      | United States         |
| 2020-11-30 19:27:15.536 | 21   | 8.46.118.28  | AS13335 | CLOUDFLARENET | Montreal          | Canada                |
| 2020-11-30 19:27:15.574 | 21   | 8.45.111.15  | AS13335 | CLOUDFLARENET | Indianapolis      | United States         |
| 2020-11-30 19:27:15.614 | 21   | 8.46.118.28  | AS13335 | CLOUDFLARENET | Montreal          | Canada                |
| 2020-11-30 19:27:25.760 | 21   | 8.6.112.100  | AS13335 | CLOUDFLARENET | Dallas            | United States         |
| 2020-11-30 19:27:25.809 | 21   | 8.6.112.100  | AS13335 | CLOUDFLARENET | Dallas            | United States         |
| 2020-11-30 19:27:25.858 | 21   | 8.6.112.100  | AS13335 | CLOUDFLARENET | Dallas            | United States         |
| 2020-11-30 19:27:25.907 | 21   | 8.6.112.100  | AS13335 | CLOUDFLARENET | Dallas            | United States         |
| 2020-11-30 19:27:25.956 | 21   | 8.6.112.100  | AS13335 | CLOUDFLARENET | Dallas            | United States         |
| 2020-11-30 19:27:45.023 | 21   | 8.6.146.7    | AS13335 | CLOUDFLARENET | Nashville         | United States         |
| 2020-11-30 19:27:45.090 | 21   | 8.6.146.7    | AS13335 | CLOUDFLARENET | Nashville         | United States         |
| 2020-11-30 19:27:45.109 | 21   | 8.6.145.38   | AS13335 | CLOUDFLARENET | Wallingford       | United States         |
| 2020-11-30 19:27:45.158 | 21   | 8.6.146.7    | AS13335 | CLOUDFLARENET | Nashville         | United States         |
| 2020-11-30 19:27:45.189 | 21   | 8.6.145.38   | AS13335 | CLOUDFLARENET | Wallingford       | United States         |
| 2020-11-30 19:27:45.226 | 21   | 8.6.146.7    | AS13335 | CLOUDFLARENET | Nashville         | United States         |
| 2020-11-30 19:27:45.263 | 21   | 8.6.145.38   | AS13335 | CLOUDFLARENET | Wallingford       | United States         |
| 2020-11-30 19:27:45.294 | 21   | 8.6.146.7    | AS13335 | CLOUDFLARENET | Nashville         | United States         |
| 2020-11-30 19:27:45.347 | 21   | 8.6.145.38   | AS13335 | CLOUDFLARENET | Wallingford       | United States         |
| 2020-11-30 19:27:45.426 | 21   | 8.6.145.38   | AS13335 | CLOUDFLARENET | Wallingford       | United States         |
| 2020-11-30 19:27:51.706 | 21   | 8.45.100.14  | AS13335 | CLOUDFLARENET | Tampa             | United States         |
| 2020-11-30 19:27:51.775 | 21   | 8.45.100.14  | AS13335 | CLOUDFLARENET | Tampa             | United States         |
| 2020-11-30 19:27:51.845 | 21   | 8.45.100.14  | AS13335 | CLOUDFLARENET | Tampa             | United States         |
| 2020-11-30 19:27:51.921 | 21   | 8.45.100.14  | AS13335 | CLOUDFLARENET | Tampa             | United States         |
| 2020-11-30 19:27:51.997 | 21   | 8.45.100.14  | AS13335 | CLOUDFLARENET | Tampa             | United States         |
| 2020-11-30 19:27:56.891 | 21   | 8.6.144.32   | AS13335 | CLOUDFLARENET | Chicago           | United States         |
| 2020-11-30 19:27:56.959 | 21   | 8.6.144.32   | AS13335 | CLOUDFLARENET | Chicago           | United States         |
| 2020-11-30 19:27:57.026 | 21   | 8.6.144.32   | AS13335 | CLOUDFLARENET | Chicago           | United States         |
| 2020-11-30 19:27:57.093 | 21   | 8.6.144.32   | AS13335 | CLOUDFLARENET | Chicago           | United States         |
| 2020-11-30 19:27:57.161 | 21   | 8.6.144.32   | AS13335 | CLOUDFLARENET | Chicago           | United States         |
| 2020-11-30 19:27:57.596 | 21   | 8.45.97.24   | AS13335 | CLOUDFLARENET | Philadelphia      | United States         |
| 2020-11-30 19:27:57.670 | 21   | 8.45.97.24   | AS13335 | CLOUDFLARENET | Philadelphia      | United States         |
| 2020-11-30 19:27:57.745 | 21   | 8.45.97.24   | AS13335 | CLOUDFLARENET | Philadelphia      | United States         |
| 2020-11-30 19:27:57.820 | 21   | 8.45.97.24   | AS13335 | CLOUDFLARENET | Philadelphia      | United States         |
| 2020-11-30 19:27:57.894 | 21   | 8.45.97.24   | AS13335 | CLOUDFLARENET | Philadelphia      | United States         |
| 2020-11-30 19:28:19.280 | 21   | 8.46.113.19  | AS13335 | CLOUDFLARENET | Mexico City       | Mexico                |
| 2020-11-30 19:28:19.348 | 21   | 8.46.113.19  | AS13335 | CLOUDFLARENET | Mexico City       | Mexico                |
| 2020-11-30 19:28:19.416 | 21   | 8.46.113.19  | AS13335 | CLOUDFLARENET | Mexico City       | Mexico                |
| 2020-11-30 19:28:19.484 | 21   | 8.46.113.19  | AS13335 | CLOUDFLARENET | Mexico City       | Mexico                |
| 2020-11-30 19:28:19.497 | 21   | 8.45.44.12   | AS13335 | CLOUDFLARENET | Richmond          | United States         |
| 2020-11-30 19:28:19.552 | 21   | 8.46.113.19  | AS13335 | CLOUDFLARENET | Mexico City       | Mexico                |
| 2020-11-30 19:28:19.574 | 21   | 8.45.44.12   | AS13335 | CLOUDFLARENET | Richmond          | United States         |
| 2020-11-30 19:28:19.643 | 21   | 8.45.44.12   | AS13335 | CLOUDFLARENET | Richmond          | United States         |
| 2020-11-30 19:28:19.723 | 21   | 8.45.44.12   | AS13335 | CLOUDFLARENET | Richmond          | United States         |
| 2020-11-30 19:28:19.792 | 21   | 8.45.44.12   | AS13335 | CLOUDFLARENET | Richmond          | United States         |
| 2020-11-30 19:28:22.810 | 21   | 8.20.122.148 | AS13335 | CLOUDFLARENET | Fairfax           | United States         |
| 2020-11-30 19:28:22.899 | 21   | 8.20.122.148 | AS13335 | CLOUDFLARENET | Fairfax           | United States         |
| 2020-11-30 19:28:22.988 | 21   | 8.20.122.148 | AS13335 | CLOUDFLARENET | Fairfax           | United States         |
| 2020-11-30 19:28:23.067 | 21   | 8.20.122.148 | AS13335 | CLOUDFLARENET | Fairfax           | United States         |
| 2020-11-30 19:28:23.150 | 21   | 8.20.122.148 | AS13335 | CLOUDFLARENET | Fairfax           | United States         |
| 2020-11-30 19:28:25.631 | 21   | 8.45.46.17   | AS13335 | CLOUDFLARENET | Pittsburgh        | United States         |
| 2020-11-30 19:28:25.698 | 21   | 8.45.46.17   | AS13335 | CLOUDFLARENET | Pittsburgh        | United States         |
| 2020-11-30 19:28:25.766 | 21   | 8.45.46.17   | AS13335 | CLOUDFLARENET | Pittsburgh        | United States         |
| 2020-11-30 19:28:25.833 | 21   | 8.45.46.17   | AS13335 | CLOUDFLARENET | Pittsburgh        | United States         |
| 2020-11-30 19:28:25.900 | 21   | 8.45.46.17   | AS13335 | CLOUDFLARENET | Pittsburgh        | United States         |
| 2020-11-30 19:28:55.217 | 21   | 8.46.114.6   | AS13335 | CLOUDFLARENET | Norfolk           | United States         |
| 2020-11-30 19:28:55.294 | 21   | 8.46.114.6   | AS13335 | CLOUDFLARENET | Norfolk           | United States         |
| 2020-11-30 19:28:55.373 | 21   | 8.46.114.6   | AS13335 | CLOUDFLARENET | Norfolk           | United States         |
| 2020-11-30 19:28:55.457 | 21   | 8.46.114.6   | AS13335 | CLOUDFLARENET | Norfolk           | United States         |
| 2020-11-30 19:28:55.538 | 21   | 8.46.114.6   | AS13335 | CLOUDFLARENET | Norfolk           | United States         |
| 2020-11-30 19:29:20.055 | 21   | 8.9.230.176  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:20.109 | 21   | 8.9.230.176  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:20.173 | 21   | 8.9.230.176  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:20.237 | 21   | 8.9.230.176  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:20.313 | 21   | 8.9.230.176  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:29.922 | 21   | 8.21.13.23   | AS13335 | CLOUDFLARENET | The Bronx         | United States         |
| 2020-11-30 19:29:30.002 | 21   | 8.21.13.23   | AS13335 | CLOUDFLARENET | The Bronx         | United States         |
| 2020-11-30 19:29:30.084 | 21   | 8.21.13.23   | AS13335 | CLOUDFLARENET | The Bronx         | United States         |
| 2020-11-30 19:29:30.164 | 21   | 8.21.13.23   | AS13335 | CLOUDFLARENET | The Bronx         | United States         |
| 2020-11-30 19:29:30.245 | 21   | 8.21.13.23   | AS13335 | CLOUDFLARENET | The Bronx         | United States         |
| 2020-11-30 19:29:34.686 | 21   | 8.47.14.24   | AS13335 | CLOUDFLARENET | McAllen           | United States         |
| 2020-11-30 19:29:34.744 | 21   | 8.47.14.24   | AS13335 | CLOUDFLARENET | McAllen           | United States         |
| 2020-11-30 19:29:34.802 | 21   | 8.47.14.24   | AS13335 | CLOUDFLARENET | McAllen           | United States         |
| 2020-11-30 19:29:34.823 | 21   | 8.47.13.206  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:34.860 | 21   | 8.47.14.24   | AS13335 | CLOUDFLARENET | McAllen           | United States         |
| 2020-11-30 19:29:34.900 | 21   | 8.47.13.206  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:34.918 | 21   | 8.47.14.24   | AS13335 | CLOUDFLARENET | McAllen           | United States         |
| 2020-11-30 19:29:34.977 | 21   | 8.47.13.206  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:35.055 | 21   | 8.47.13.206  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:29:35.132 | 21   | 8.47.13.206  | AS13335 | CLOUDFLARENET | None              | United States         |
| 2020-11-30 19:30:39.359 | 21   | 8.38.172.112 | AS13335 | CLOUDFLARENET | Osaka             | Japan                 |
| 2020-11-30 19:30:39.503 | 21   | 8.38.172.112 | AS13335 | CLOUDFLARENET | Osaka             | Japan                 |
| 2020-11-30 19:30:39.647 | 21   | 8.38.172.112 | AS13335 | CLOUDFLARENET | Osaka             | Japan                 |
| 2020-11-30 19:30:39.791 | 21   | 8.38.172.112 | AS13335 | CLOUDFLARENET | Osaka             | Japan                 |
| 2020-11-30 19:30:39.936 | 21   | 8.38.172.112 | AS13335 | CLOUDFLARENET | Osaka             | Japan                 |

My first inclination is to think the IP addresses are being spoofed. Have you asked your upstream provider to check this?

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