Global IP Matchlist

Unit21 maintains a global IP watchlist for any agent to use in models (rules).

The global watchlist is updated daily from 3 sources:


Spamhaus is the world leader in supplying realtime highly accurate threat intelligence to the Internet's major networks.

The Spamhaus DROP (Don't Route Or Peer) lists are advisory "drop all traffic" lists, consisting of netblocks that are "hijacked" or leased by professional spam or cyber-crime operations (used for dissemination of malware, trojan downloaders, botnet controllers).

Spamhaus Don't Route Or Peer List (DROP)

The DROP list will not include any IP address space under the control of any legitimate network - even if being used by "the spammers from hell". DROP will only include netblocks allocated directly by an established Regional Internet Registry (RIR) or National Internet Registry (NIR) such as ARIN, RIPE, AFRINIC, APNIC, LACNIC or KRNIC or direct RIR allocations.

Spamhaus Extended DROP List (EDROP)

EDROP is an extension of the DROP list that includes suballocated netblocks controlled by spammers or cyber criminals. EDROP is meant to be used in addition to the direct allocations on the DROP list.


IPsum is a threat intelligence feed based on 30+ different publicly available lists of suspicious and/or malicious IP addresses. All lists are automatically retrieved and parsed on a daily (24h) basis.