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What does DNS replication mean?
Passive DNS replication is a technology which constructs zone replicas without cooperation from zone administrators, based on captured name server responses. Inter-server DNS messages are captured by sensors and forwarded to a collection point for analysis.
What is passive DNS used for?
Passive DNS is a way of storing DNS resolution data, so that you can reference past DNS record values to uncover potential security incidents or discover malicious infrastructures. For example, when a DNS record changes, the previous value is gone.
What is passive DNS monitoring?
Put simply, passive DNS monitoring is a method by which a traffic monitoring station examines the contents of DNS queries and responses, then logs that information in a standardized format to text files or other long-term storage mechanisms. The data points logged vary based on the software used.
What is my reverse DNS?
A reverse DNS is exactly what you’d expect. It’s where the hostname of a certain IP address is queried. Basically, a reverse DNS lookup returns the hostname of an IP address. Information about where an IP address came from is useful to B2B companies in particular.
What is active and passive DNS?
Active DNS Versus Passive DNS The whole domain name system is a distributed database consisting of zone files as primary sources and cached data. And when we talk about active DNS, we refer to DNS responses to deliberate DNS queries. By keeping logs of the DNS traffic, passive DNS provides an answer to this problem.
Why are DNS logs important?
Why DNS traffic is important Each connection made to a domain by the client devices is recorded in the DNS logs. Inspecting DNS traffic between client devices and your local recursive resolver could reveal a wealth of information for forensic analysis. DNS queries can reveal: Botnets/Malware connecting to C&C servers.
What is the benefit of enabling the passive DNS Monitoring checkbox on the next generation firewall?
Passive DNS monitoring enables the firewall to act as a passive DNS sensor and send DNS information to Palo Alto Networks for analysis to improve threat intelligence and threat prevention capabilities.