Me volvió a pasar lo mismo, en su día active en CumulusMX los log del ftp. Pero lo acabee desactivando. Lo volví activar he hice una prueba muy simple. A las 18:15 he desenchufado el cable de fibra de la ONT. Al rato he vuelto conectar y la Raspberry ha vuelto a recuperar conectividad. Pero tras esperar un rato la web no se recuperaba. Para recuperar he tenido que reiniciar Cumulus y eso antes no pasaba. Lo se bien por que he tenido muchas noches horas sin internet y al recuperarse ha vuelto a funcionar sin hacer nada.
Log CumulusMX ftp
2021-09-19 18:15:49.034 Realtime[163]: Uploading - realtime.txt
2021-09-19 18:15:49.035 SFTP[163]: Uploading realtime.txt to /var/www/html/realtime.txt
2021-09-19 18:15:49.104 SFTP[163]: Uploaded realtime.txt
2021-09-19 18:15:49.104 SFTP[163]: Completed uploading realtime.txt to /var/www/html/realtime.txt
2021-09-19 18:15:49.104 Realtime[163]: Uploading - realtimegauges.txt
2021-09-19 18:15:49.104 SFTP[163]: Uploading web/realtimegauges.txt to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.174 SFTP[163]: Uploaded web/realtimegauges.txt
2021-09-19 18:15:49.174 SFTP[163]: Completed uploading web/realtimegauges.txt to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.174 Realtime[163]: Uploading extra web file[0] /home/pi/CumulusMX/web/realtimegaugesT.txttmp to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.174 SFTP[163]: Uploading /home/pi/CumulusMX/web/realtimegaugesT.txttmp to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.244 SFTP[163]: Uploaded /home/pi/CumulusMX/web/realtimegaugesT.txttmp
2021-09-19 18:15:49.244 SFTP[163]: Completed uploading /home/pi/CumulusMX/web/realtimegaugesT.txttmp to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.244 Realtime[163]: Uploading extra web file[2] /home/pi/CumulusMX/web/realtimegaugesT.txt to /var/www/html/webtest/realtimegauges.txt
2021-09-19 18:15:49.245 SFTP[163]: Uploading /home/pi/CumulusMX/web/realtimegaugesT.txt to /var/www/html/webtest/realtimegauges.txt
2021-09-19 18:15:49.314 SFTP[163]: Uploaded /home/pi/CumulusMX/web/realtimegaugesT.txt
2021-09-19 18:15:49.314 SFTP[163]: Completed uploading /home/pi/CumulusMX/web/realtimegaugesT.txt to /var/www/html/webtest/realtimegauges.txt
2021-09-19 18:15:49.314 Realtime[163]: Uploading extra web file[4] /home/pi/CumulusMX/realtime.txt to /var/www/html/webtest/realtime.txt
2021-09-19 18:15:49.314 SFTP[163]: Uploading /home/pi/CumulusMX/realtime.txt to /var/www/html/webtest/realtime.txt
2021-09-19 18:15:49.383 SFTP[163]: Uploaded /home/pi/CumulusMX/realtime.txt
2021-09-19 18:15:49.383 SFTP[163]: Completed uploading /home/pi/CumulusMX/realtime.txt to /var/www/html/webtest/realtime.txt
2021-09-19 18:15:59.034 Realtime[164]: Uploading - realtime.txt
2021-09-19 18:15:59.035 SFTP[164]: Uploading realtime.txt to /var/www/html/realtime.txt
2021-09-19 18:20:02.661 SFTP[Int]: Connecting using password authentication
2021-09-19 18:20:02.661 SFTP[Int]: CumulusMX Connecting to 82.223.139.223 on port 22
2021-09-19 18:20:02.662 SFTP[Int]: Error connecting SFTP - Network is unreachable
2021-09-19 18:25:02.612 SFTP[Int]: Connecting using password authentication
2021-09-19 18:25:02.612 SFTP[Int]: CumulusMX Connecting to 82.223.139.223 on port 22
2021-09-19 18:25:02.613 SFTP[Int]: Error connecting SFTP - Network is unreachable
2021-09-19 18:30:02.699 SFTP[Int]: Connecting using password authentication
2021-09-19 18:30:02.699 SFTP[Int]: CumulusMX Connecting to 82.223.139.223 on port 22
2021-09-19 18:30:04.624 SFTP[Int]: Uploading extra files
2021-09-19 18:30:04.624 SFTP[Int]: Uploading /home/pi/CumulusMX/web/CUtags.txttmp to /var/www/html/CUtags.php
2021-09-19 18:30:04.703 SFTP[Int]: Uploaded /home/pi/CumulusMX/web/CUtags.txttmp
2021-09-19 18:30:04.703 SFTP[Int]: Completed uploading /home/pi/CumulusMX/web/CUtags.txttmp to /var/www/html/CUtags.php
2021-09-19 18:30:04.703 SFTP[Int]: Uploading /home/pi/CumulusMX/web/CUtags.txt to /var/www/html/webtest/CUtags.php
2021-09-19 18:30:04.770 SFTP[Int]: Uploaded /home/pi/CumulusMX/web/CUtags.txt
2021-09-19 18:30:04.770 SFTP[Int]: Completed uploading /home/pi/CumulusMX/web/CUtags.txt to /var/www/html/webtest/CUtags.php
2021-09-19 18:30:04.770 SFTP[Int]: Done uploading extra files
2021-09-19 18:30:04.770 SFTP[Int]: Uploading standard web files
2021-09-19 18:30:04.771 SFTP[Int]: Uploading web/websitedata.json to /var/www/html/websitedata.json
2021-09-19 18:30:04.839 SFTP[Int]: Uploaded web/websitedata.json
2021-09-19 18:30:04.839 SFTP[Int]: Completed uploading web/websitedata.json to /var/www/html/websitedata.json
2021-09-19 18:30:04.839 SFTP[Int]: Done uploading standard web files
2021-09-19 18:30:04.839 SFTP[Int]: Uploading graph data files
2021-09-19 18:30:04.840 SFTP[Int]: Uploading web/tempdata.json to /var/www/html/tempdata.json
2021-09-19 18:30:04.990 SFTP[Int]: Uploaded web/tempdata.json
2021-09-19 18:30:04.990 SFTP[Int]: Completed uploading web/tempdata.json to /var/www/html/tempdata.json
2021-09-19 18:30:04.990 SFTP[Int]: Uploading web/pressdata.json to /var/www/html/pressdata.json
Log de.cumulus mxdiag
2021-09-19 18:15:49.034 Realtime[163]: Uploading - realtime.txt
2021-09-19 18:15:49.104 Realtime[163]: Uploading - realtimegauges.txt
2021-09-19 18:15:49.174 Realtime[163]: Uploading extra web file[0] /home/pi/CumulusMX/web/realtimegaugesT.txttmp to /var/www/html/realtimegauges.txt
2021-09-19 18:15:49.244 Realtime[163]: Uploading extra web file[2] /home/pi/CumulusMX/web/realtimegaugesT.txt to /var/www/html/webtest/realtimegauges.txt
2021-09-19 18:15:49.314 Realtime[163]: Uploading extra web file[4] /home/pi/CumulusMX/realtime.txt to /var/www/html/webtest/realtime.txt
2021-09-19 18:15:59.034 Realtime[164]: Uploading - realtime.txt
2021-09-19 18:16:09.034 Realtime[165]: Warning, a previous cycle is still trying to connect to FTP server, skip count = 11
2021-09-19 18:16:09.034 Realtime[165]: No FTP attempted this cycle
2021-09-19 18:16:19.034 Realtime[166]: Warning, a previous cycle is still trying to connect to FTP server, skip count = 12
2021-09-19 18:16:19.034 Realtime[166]: No FTP attempted this cycle
2021-09-19 18:16:29.039 Realtime[167]: Warning, a previous cycle is still trying to connect to FTP server, skip count = 13
2021-09-19 18:16:29.039 Realtime[167]: No FTP attempted this cycle
Esto es fácilmente reproducible. Fallo mío? O bug de Cumulus??