Unmaintained since its only update in 2011. tb already fixed up libressl breakage, upstream url times out, noone else packages it (except AIX and Arch).
I suppose either of ssh, netcat and socat do a better job these days. OK to remove? --- Information for https://cdn.openbsd.org/pub/OpenBSD/snapshots/packages/amd64/ctunnel-0.4p1.tgz Comment: provide cryptographic tunnel Description: ctunnel is a software for proxying and forwarding TCP connections via a cryptographic tunnel. ctunnel can be used to secure any existing TCP based protocol, such as HTTP, VNC, Telnet, FTP, RSH, MySQL, etc. You can also chain/bounce connections to any number of intermediary hosts. Maintainer: Pierre-Emmanuel Andre <p...@openbsd.org> WWW: http://nardcore.org/ctunnel/