Traffic filtering method and device and storage medium

The traffic filtering method comprises the following steps: acquiring a data packet which is sent by an access end to an external server and is used for requesting connection; judging whether the access end belongs to a white list or not according to the data packet; if the access end belongs to the white list, opening a connection authority to an external server end for the access end; if the access end does not belong to the white list, acquiring an authentication information sequence contained in a data packet; judging whether the authentication information sequence is correct or not; and if the authentication information sequence is correct, adding the access end into the white list. As the data packet which is used for requesting connection and is sent to the external server by the illegal access end without the authentication information sequence each time is intercepted and rejected by the firewall, malicious traffic of the illegal access end can be effectively intercepted. The invention further provid