/usr/src/xtables-addons-1.40/libxt_ECHO.man is in xtables-addons-dkms 1.40-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | The \fBECHO\fP target will send back all packets it received. It serves as an
examples for an Xtables target.
.PP
ECHO takes no options.
|