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[Cloudflare One] Expand Chrome Local Network Access known issue documentation#28672

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patriciasantaana merged 1 commit intocloudflare:productionfrom
Encore-Encore:escalation-190-chrome-lna-known-issues
Mar 2, 2026
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[Cloudflare One] Expand Chrome Local Network Access known issue documentation#28672
patriciasantaana merged 1 commit intocloudflare:productionfrom
Encore-Encore:escalation-190-chrome-lna-known-issues

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@Encore-Encore Encore-Encore commented Feb 28, 2026

Summary

  • Expands the existing Chrome Local Network Access known issue with a clearer root cause explanation (why 100.80.0.0/16 is treated as local network by Chrome)
  • Adds a note about broadly-matched domains (e.g. cloudfront.net, github.com) amplifying the issue
  • Adds a new Iframes subsection documenting permission requirements for iframe-based applications
  • Expands workarounds from 2 to 5 options, including the recommended LocalNetworkAccessIpAddressSpaceOverrides policy (Chrome 146+)

Context

Based on findings from ESCALATION-190, where users were unable to access an application embedded in an iframe due to Chrome's Local Network Access restrictions interacting with Gateway's initial resolved IP range. The investigation identified the root cause and multiple Chrome Enterprise policy workarounds across different Chrome versions.

Changes

Updates the shared partial src/content/partials/cloudflare-one/gateway/egress-selector-chrome-issue.mdx, which is rendered on 4 pages:

  • /cloudflare-one/traffic-policies/egress-policies/host-selectors/
  • /cloudflare-one/traffic-policies/egress-policies/egress-cloudflared/
  • /cloudflare-one/networks/connectors/cloudflare-tunnel/private-net/cloudflared/connect-private-hostname/
  • /cloudflare-one/access-controls/applications/non-http/self-hosted-private-app/

…root cause, iframe details, and additional workarounds
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lgtm!

@patriciasantaana patriciasantaana merged commit e94359e into cloudflare:production Mar 2, 2026
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