Unverified50% confidenceFactExact time
PNA规范将网络地址空间划分为公共网络、私有网络（RFC 1918定义的地址段）和本地主机三个层级，当低安全层级向高安全层级发起请求时浏览器必须先发送CORS预检请求
1
Sources
50%
Confidence
Long-term
Relevance
8/13/2026
First Seen
Sources
Related Claims
UnverifiedThe PNA specification requires that when a context of a lower security level accesses an address of a higher security level, the browser must first send a CORS preflight request, and only after the target server returns Access-Control-Allow-Private-Network: true will the actual request be allowed through.80% similarUnverifiedChromium的本地网络限制对于安全上下文（HTTPS）通常更为宽松，为自托管服务配置本地CA证书并启用HTTPS访问可规避纯IP+HTTP访问被拦截的问题64% similarUnverifiedICANN的安全与稳定咨询委员会（SSAC）建议关键互联网基础设施运营商应将域名连续性纳入与服务器冗余同等级别的运维标准63% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/743498API
curl https://kongchang.com/api/v1/knowledge/claims/743498MCP
get_claim(id=743498)