If IPTV works with a VPN but fails on a direct connection, your ISP may be blocking, throttling, or misrouting IPTV streams. VPNs hide streaming signatures and can route traffic through better-performing paths. Another possibility is DNS filtering or regional blocks that the VPN bypasses. Use a reputable VPN with low latency and streaming-optimized servers, check DNS settings, and contact your ISP to verify if ports or traffic types are restricted. Glanfy documents provider behavior in regions where VPNs are commonly required.