Subscriber home networks: prove LAN before blaming the headend

Ask for one wired run from router to a single known-good box, VPN off, parental DNS filters off. If that path is clean but Wi‑Fi fails, you have already isolated the home mesh—not the wholesale line.

Pi-hole-ish blocklists and aggressive “security” DNS can break manifest hosts or time sync. A temporary revert to ISP defaults is a diagnostic, not a debate about vendors.

Double-NAT and CGNAT patterns still appear in the wild. You do not need ISP deep expertise—just recognise “strict NAT console plus IPTV flaps” as a cue to simplify to one routing edge.

Broken IPv6 tunnels occasionally steer traffic oddly. A short IPv4-only trial on the gateway—where the household agrees—is a pragmatic A/B test, not a religion.

Close tickets with measurements: headroom at peak, loss to a close hop, jitter on voice or gaming at the same clock time. Numbers end ping-pong and keep IPTVRestream.net paths out of speculative blame.