Package: wnpp Severity: wishlist "tcpproxy is a simple tcp connection proxy which combines the features of rinetd and 6tunnel. tcpproxy supports IPv4 and IPv6 and also supports connections from IPv6 to IPv4 endpoints and vice versa."
Since rinetd does not support IPv6 I was looking for alternatives and found this software. URL: https://spreadspace.org/tcpproxy/ The man page can be accessed here: https://www.gsp.com/cgi-bin/man.cgi?section=8&topic=tcpproxy tcpproxy has been available as an official openwrt package since June 2014, so it should be very mature by now.