10.13.x NetBoot Images Fail to Auto-Login when served over HTTP

Number:rdar://34640065 Date Originated:26-Sep-2017 12:38 am
Status:Open Resolved:
Product:macOS + SDK Product Version:10.13.x
Classification:UI/Usability Reproducible:Always
Tested over Server.app: 5.2, 5.3 & 5.4.

When a 10.13.x NetBoot Image, with auto-login enabled, is served over HTTP. Auto-Login fails.

The same 10.13.x NetBoot Image, will auto-login when NFS is enabled (see 34639788 for the related issue with this)

Steps to Reproduce:
1. Create an NBI with auto-login enabled for a user account
2. Add to NetInstall Service
3. Enable NetInstall Service
4. Share NBI over HTTP
5. Attempt to Boot from NBI
6. Cancel NetBoot
7. Share NBI over NFS
8. Attempt to Boot from NBI

Expected Results:
Auto-login should work on the NBI regardless of protocol shared over.

Actual Results:
HTTP fails to auto-login, NFS works




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