All TCP and HTTP availability probes were failing with 'no route to host'
because the Pulse process's Go networking stack cannot reach local subnet
IPs when a Tailscale system extension is active. The ICMP probe already
worked because it uses exec.Command('ping'). Apply the same pattern:
- probeTCP: try Go net.Dialer first, fall back to exec.Command('nc')
- probeHTTP: try Go http.Client first, fall back to exec.Command('curl')
- Both fallbacks use OS-appropriate timeout flags (macOS: -G, Linux: -w)
- HTTP probes now skip TLS verification (availability check, not identity)
- Add AvailabilityProbeHTTPS protocol constant and wire it through
Validate, HTTPURL, Normalize, and the probe switch
- Replace bulky TooltipPortal tooltip on AvailabilityProbeCell with a
clean native title attribute ('14 ms - checked 3s ago')
Before: 0/20 probes green (all 'no route to host')
After: 14/20 probes green (6 legitimately down hosts)
rcourtman
25c93bf77f