TCP connections to Azure Front Door IPv6 endpoints in the 2620:1ec::/32 range fail completely from Orange Poland's IPv6 network (AS5617). ICMP probes successfully reach Azure's internal infrastructure, confirming the issue is not a BGP peering problem — packets enter Azure's network but TCP sessions to the Front Door anycast IPs never complete. Multiple production sites using Azure Front Door are affected.
| DNS name | CNAME chain | Azure Front Door IPv6 |
|---|