Unverified50% confidenceFactExact time
DNS poisoning is a censorship technique in which the local DNS resolver returns an incorrect IP address, redirecting requests to a null address or an interception page.
1
Sources
50%
Confidence
Long-term
Relevance
9/20/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedDNS (Domain Name System) is responsible for translating human-readable domain names into machine-readable IP addresses.71% similarUnverifiedDNS resolvers cache queried records in memory so that subsequent queries for the same domain name can return results directly without the need for recursive queries again.68% similarUnverifiedThe most reliable defense against DNS Rebinding is to strictly validate the Host request header on the server side and reject any hostname not on the whitelist.64% similarUnverifiedPi-hole acts as a LAN DNS server; when a device requests resolution of a known advertising or tracking domain, it returns a null address (such as 0.0.0.0 or NXDOMAIN), thereby blocking ad loading at the network level.64% similarUnverified自建邮件服务器面临 IP 信誉管理、反向 DNS 配置、SPF/DKIM/DMARC 设置、安全更新、TLS 证书维护等运维挑战，新服务器 IP 信誉分较低导致邮件易被归入垃圾箱62% similar
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