Question 1

What is IP Reputation and why does it matter?

Accepted Answer

IP Reputation is a score that reflects how trustworthy or malicious an IP address is based on its historical and current behavior. A low-reputation IP has been associated with spam, malware distribution, botnet activity, port scanning, or other malicious behavior across threat intelligence sources. IP Reputation lookups are used by email security systems, firewalls, and SOC analysts to quickly triage suspicious connections and filter known-bad traffic.

Question 2

What information does the IP Reputation lookup return?

Accepted Answer

For each IP address, the lookup returns: risk score (0–100), threat category (botnet C2, spam source, phishing host, scanner, Tor exit node, proxy/VPN, malware distribution), geolocation and ASN, whether the IP appears on major blocklists, recent malicious activity observations, and if applicable, threat actor associations. This gives analysts an immediate, evidence-based assessment without manually cross-referencing multiple threat feeds.

Question 3

How can I use IP Reputation in my security operations?

Accepted Answer

Common use cases include: triaging SIEM alerts by quickly checking whether source IPs in security events are known-malicious, enriching firewall logs to prioritize blocked connection investigations, validating whether email sources are spam or phishing infrastructure before opening attachments, and investigating suspicious IPs in phishing headers or malware network traffic. High-reputation IPs from your corporate range can also be checked to verify they haven't been listed as spam sources.

Question 4

Why would my corporate IP have a low reputation score?

Accepted Answer

Your corporate IP may have a low reputation score if: a compromised endpoint is sending spam or participating in a botnet, your email server is misconfigured and sending email that gets marked as spam, your IP range was previously assigned to a different organization with poor security practices, or a penetration test or vulnerability scanner was run from your network without notifying threat intelligence providers. A low score doesn't always mean compromise — it requires investigation.

Question 5

How current is the IP reputation data?

Accepted Answer

SOCRadar IP Reputation aggregates data from over 200 threat intelligence sources that update continuously. New malicious IPs are typically reflected within minutes to hours of their first detection. However, reputation scores can also age — an IP that was malicious six months ago but has since been cleaned may still show residual low scores. The tool shows recency information for each finding so analysts can weigh current versus historical data appropriately.