In mid-2018, major ISPs started rolling out native IPv6 aggressively, but most corporate internal apps were still IPv4-only. Build 20180914 included a stealth fix that allowed the SOCKS5 proxy to act as a protocol translator. If you knew the right socks.ini tweak, you could make an ancient IPv4-only accounting software connect to an IPv6-enabled AWS database.
: Provides granular control through IP address, MAC address, and User/Password authentication. Youngzsoft Key Features Access Control CCProxy 8.0 Build 20180914