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To setup a nyancat telnet server via inetd enable inetd in /etc/rc.conf:

inetd_enable="YES"

Add the following lines to /etc/inetd.conf:

telnet  stream  tcp     nowait  nobody  %%PREFIX%%/bin/nyancat  nyancat -t
telnet  stream  tcp6    nowait  nobody  %%PREFIX%%/bin/nyancat  nyancat -t

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