Port 53 also got no PIA replies: this network transparently intercepts outbound :53, so dig works but OpenVPN-over-53 is swallowed. An NTP/123 probe from the host returned fine, proving arbitrary non-53 UDP works bidirectionally (so it's port-specific: 1197 conflict + 53 DNS-intercept, not a UDP block). Move to 8080 (community-verified for PIA, non-DNS, non-1197). Co-Authored-By: Claude Opus 4.8 <[email protected]>