METHOD OF PROTECTING SERVICE SERVER FROM DDOS ATTACKS Russian patent published in 2022 - IPC G06F21/55 G06F21/62 H04L12/28 

FIELD: physics.

SUBSTANCE: invention relates to computer engineering. Method of protecting a service server from DDoS attacks comprises switching current connections of the service server, except for nodes from the white list of IP addresses, to a backup server, where each compound is assigned a numerical identifier i = {1 ... I}; resetting the current connection on the backup server having a first identifier; monitoring network traffic on a backup server and calculating a time interval t₁ before a repeated request for a connection having a first identifier, and writing it into a memory array T; successively resetting each current connection i and monitoring network traffic; at repeated request for connection with current identifier, time intervals t_i are calculated, which are recorded in memory array T and presence of coincidence of values of time intervals t_i is calculated, at which connection identifiers are combined into corresponding arrays P_j, from which block list of IP addresses is formed; switching connections not belonging to arrays P_j from standby server to service server; all connections are reset on the backup server and further operation of the service server is performed taking into account the block list of IP addresses.

EFFECT: improvement of service server security.

1 cl, 2 dwg