My quick_conn_process_inbound unable to parse packet messages are generally preceded with udp_validate_cksum_internal [C63.1.1.1:3] udp incorrect IPv4-UDP offload checksum 0x3b00 ulen 1026 nw_protocol_udp_get_input_frames [C63.1.1.1:3] Dropped inbound packets, checking for more sec_framer_open_aesgcm failed to open for AESGCM: -4308 It's a similar environment where we're inside a protected network, with some internal DNS dispatch to a host that overwrites a global DNS setting (highjacked domain). And we're also using firebase for our iOS app.