From 7cd3c2edb1dba13867b80dd29b02d6c945fcd03f Mon Sep 17 00:00:00 2001 From: Adam Nielsen Date: Sun, 4 Apr 2010 12:59:00 +0200 Subject: extensions: add the LED target For the xt_LED target introduced in Linux 2.6.31. Signed-off-by: Jan Engelhardt --- extensions/libxt_LED.man | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 extensions/libxt_LED.man (limited to 'extensions/libxt_LED.man') diff --git a/extensions/libxt_LED.man b/extensions/libxt_LED.man new file mode 100644 index 00000000..0226f107 --- /dev/null +++ b/extensions/libxt_LED.man @@ -0,0 +1,30 @@ +This creates an LED-trigger that can then be attached to system indicator +lights, to blink or illuminate them when certain packets pass through the +system. One example might be to light up an LED for a few minutes every time +an SSH connection is made to the local machine. The following options control +the trigger behavior: +.TP +\fB--led-trigger-id\fP \fIname\fP +This is the name given to the LED trigger. The actual name of the trigger +will be prefixed with "netfilter-". +.TP +\fB--led-delay\fP \fIms\fP +This indicates how long (in milliseconds) the LED should be left illuminated +when a packet arrives before being switched off again. The default is 0 +(blink as fast as possible.) The special value \fIinf\fP can be given to +leave the LED on permanently once activated. (In this case the trigger will +need to be manually detached and reattached to the LED device to switch it +off again.) +.TP +\fB--led-always-blink\fP +Always make the LED blink on packet arrival, even if the LED is already on. +This allows notification of new packets even with long delay values (which +otherwise would result in a silent prolonging of the delay time.) +.TP +Example: +.TP +Create an LED trigger for incoming SSH traffic: +iptables -A INPUT -p tcp --dport 22 -j LED --led-trigger-id ssh +.TP +Then attach the new trigger to an LED: +echo netfilter-ssh >/sys/class/leds/\fIledname\fP/trigger -- cgit v1.2.3