G2S is a smart, all-in-one frontend between client and server applications. It features portability, a robust super-server (inetd) replacement, TCP-wrappers integrated with paranoid DNS checks and support for broken or fake name servers, handy but detailed log files, support for various protocols (raw IP, ICMP, GGP, TCP, EGP, PUP, UDP, RDP), IPv6 compliance, IPv6 to IPv4 gatewaying, and support for RBL maps for automatic spam filtering.
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