Quantumult X 1.5.6 (925) is ready to test on iOS.
What to Test
- Because users often misunderstood the difference between udp_whitelist and udp_drop_list (ports not in the whitelist returned an ICMP, ports in the drop list dropped silently) and left apps stalling until their own UDP timeout, udp_drop_list now also sends an ICMP port unreachable like udp_whitelist does, so the client fails fast instead.
- Detect legacy Google QUIC packets, so udp_drop_list and MitM QUIC enforcement now apply to apps still shipping that older QUIC stack.
- Release Candidate 2
May 14, 2026 7.5K 7 2
