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Diffstat (limited to 'extensions/libxt_LED.man')
| -rw-r--r-- | extensions/libxt_LED.man | 30 |
1 files changed, 30 insertions, 0 deletions
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 |