DNS CACHE PROTECTION

Some embodiments provide a method for detecting that a domain name service (DNS) cache on a data compute node (DCN) has been attacked. The method, during a first operational phase of an agent executing on the DCN, builds a DNS cache that stores entries that include (i) network address to domain name...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Awate, Nilesh, OGALE, NAKUL
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Some embodiments provide a method for detecting that a domain name service (DNS) cache on a data compute node (DCN) has been attacked. The method, during a first operational phase of an agent executing on the DCN, builds a DNS cache that stores entries that include (i) network address to domain name mappings and (ii) policies for the entries received from a centralized service. During a second operational phase of the agent, the method detects that an entry of the DNS cache has been modified by a DNS response such that the modified entry violates the policy for the entry. Based on the detection, the method sends an alert to the centralized service. The centralized service performs additional analysis on the modification to determine whether to allow the DCN to use the modified DNS cache entry.