The 443 port is used by SAP processes :
sudo lsof -i:443
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
wd.sapSID 15705 sidadm 15u IPv4 xxxxxx
wd.sapSID 15705 sidadm 28u IPv4 xxxxxx
wd.sapSID 15705 sidadm 34u IPv4 xxxx
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