majorlinux/majorwiki
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

wiki: add troubleshooting article — iOS Tailscale clients report HostName="localhost" #1

Merged
majorlinux merged 1 commit from code/majormac/tailscale-ios-hostname-fix into main 2026-04-30 10:00:01 -04:00
Conversation 0 Commits 1 Files changed 3 +120 -2
majorlinux commented 2026-04-30 09:59:53 -04:00
Owner
Copy link

Documents the non-obvious failure mode where /etc/hosts generator scripts
using tailscale status --json | jq '.HostName' get poisoned by iOS
peers, which always report HostName as the literal string "localhost"
because iOS doesn't expose the device name to apps.

Includes the buggy and fixed jq filter (use .DNSName first label
instead), a real-world Postfix outage example, and a verification
checklist. Linked from troubleshooting index and SUMMARY.

Discovered while diagnosing a 24h Postfix outage on majordiscord.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

Documents the non-obvious failure mode where /etc/hosts generator scripts using `tailscale status --json | jq '.HostName'` get poisoned by iOS peers, which always report HostName as the literal string "localhost" because iOS doesn't expose the device name to apps. Includes the buggy and fixed jq filter (use .DNSName first label instead), a real-world Postfix outage example, and a verification checklist. Linked from troubleshooting index and SUMMARY. Discovered while diagnosing a 24h Postfix outage on majordiscord. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
majorlinux added 1 commit 2026-04-30 09:59:53 -04:00 
Documents the non-obvious failure mode where /etc/hosts generator scripts
using `tailscale status --json | jq '.HostName'` get poisoned by iOS
peers, which always report HostName as the literal string "localhost"
because iOS doesn't expose the device name to apps.

Includes the buggy and fixed jq filter (use .DNSName first label
instead), a real-world Postfix outage example, and a verification
checklist. Linked from troubleshooting index and SUMMARY.

Discovered while diagnosing a 24h Postfix outage on majordiscord.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
majorlinux merged commit 85f8a5df2d into main 2026-04-30 10:00:01 -04:00
Sign in to join this conversation.
Reviewers
No reviewers
Labels
Clear labels
No items
No labels
Milestone
Clear milestone
No items
No milestone
Projects
Clear projects
No items
No project
Assignees
Clear assignees
No assignees
1 participant
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference: majorlinux/majorwiki#1
No description provided.
Delete branch "code/majormac/tailscale-ios-hostname-fix"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?