Something is still running:
[2021-04-23 17:50:02.825 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:03.840 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:03.840 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:05.438 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:05.439 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:07.439 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:07.439 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:09.446 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:09.447 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:11.444 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:11.444 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:12.444 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:12.445 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:12.448 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:12.448 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:13.445 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:13.445 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:15.449 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:15.449 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:17.450 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:17.451 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:19.451 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:19.452 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:21.438 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:21.439 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:22.455 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:22.456 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:22.468 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:22.469 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:22.471 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:22.472 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:23.471 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:23.472 13129/T13130] IPv4 telnet error: Success (0)
[2021-04-23 17:50:25.443 13129/T13130] Client denied (at max capacity of 255): 255
[2021-04-23 17:50:25.444 13129/T13130] IPv4 telnet error: Success (0)
There also appear to be numerous repeated queries for:
http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp
2021-04-19 09:56:09: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:09: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:10: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: file(http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp): failed to open stream: HTTP request failed! in /var/www/html/pihole/index.php on line 172
2021-04-19 09:56:10: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:10: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: file(http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp): failed to open stream: HTTP request failed! in /var/www/html/pihole/index.php on line 172
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: file(http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp): failed to open stream: HTTP request failed! in /var/www/html/pihole/index.php on line 172
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: file(http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp): failed to open stream: HTTP request failed! in /var/www/html/pihole/index.php on line 172
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: file(http://127.0.0.1:80/admin/scripts/pi-hole/php/queryads.php?domain=o.ss2.us&bp): failed to open stream: HTTP request failed! in /var/www/html/pihole/index.php on line 172
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_filter() expects parameter 1 to be array, string given in /var/www/html/pihole/index.php on line 173
2021-04-19 09:56:13: (mod_fastcgi.c.421) FastCGI-stderr: PHP Warning: array_values() expects parameter 1 to be array, null given in /var/www/html/pihole/index.php on line 173