Signed-off-by: Jeremy Sowden <jeremy@xxxxxxxxxx> --- extensions/pknock/pknlusr.8 | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/extensions/pknock/pknlusr.8 b/extensions/pknock/pknlusr.8 index a34b8fe1abbb..2c24bff52ec5 100644 --- a/extensions/pknock/pknlusr.8 +++ b/extensions/pknock/pknlusr.8 @@ -4,12 +4,15 @@ pknlusr \(em userspace monitor for successful xt_pknock matches .SH Synopsis .PP -\fBpknlusr\fP +\fBpknlusr\fP [ \fIgroup-id\fP ] .SH Description \fIxt_pknock\fP is an xtables match extension that implements so-called \fIport knocking\fP. It can be configured to send information about each successful match via a netlink socket to userspace. \fBpknluser\fP listens for these notifications. +.PP +By default, \fBpknlusr\fP listens for messages sent to netlink multicast group +1. Another group ID may be passed as a command-line argument. .SH See also .PP xtables-addons(8) -- 2.28.0
