Old protocols like Shadowsocks are easily identified by their traffic signature (entropy). Reflect4 attempts to blend in. This forces firewalls to make a difficult choice: either allow the traffic (and risk users bypassing censorship) or block the traffic (and potentially block legitimate business traffic that looks similar).
If maintaining your own proxy list becomes too time-consuming, consider these free or low-cost alternatives: reflect4 proxy list free updated
Several websites maintain free, updated proxy lists that can be exported in Reflect4 format. These include: Old protocols like Shadowsocks are easily identified by
These lists are refreshed periodically—sometimes every hour—to ensure that dead or slow proxies are removed. This is why the keyword is so highly sought after. reflect4 proxy list free updated