Filter the DNS blacklist

Filter the DNS blacklist

Filtering via a DNS blacklist can prevent a surfbar user whose an IP address that is on a DNS blacklist from being granted access to a advertising campaign.

Filter the DNS blacklist

What is a DNS blacklist?

A DNS blacklist (DNSBL) is a sometimes public blacklist that lists IP addresses that have attracted negative attention. IP addresses that are on a DNS blacklist are often associated with systems that are infected with a Trojan, with other malware, or which send spam emails.

Advantages and disadvantages of the DNS blacklist

If you use the DNS blacklist filter, you block most of the public access points, such as restaurants or cafés with public Wi-Fi. Mobile networks (LTE) are often on such a blacklist.

A DNS blacklist can never determine the legitimacy of a single user access. Individual visits are prevented by the use of the visitor filter and the range of the advertising campaign is limited as a precautionary measure.

At the same time, many advertisers see a DNS blacklist as a proven way to optimize the desired audience and to improve the traffic quality by applying a strong exclusion criterion.

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