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nettraf.html
<![CDATA[
#!/usr/bin/sh
INTERFACE=lan1 # NIC to monitor
set -u
typeset -i OLD_PACKETS_IN=0
typeset -i OLD_PACKETS_OUT=0
typeset -i OLD_PACKETS_IN_ERR=0
typeset -i OLD_PACKETS_OUT_ERR=0
typeset -i OLD_COLLISSIONS=0
typeset -i IN_BOUND_ERRORS=0
typeset -i NEW_IN_BOUND_ERRORS=0
typeset -i OUT_BOUND_DISCARDS=0
typeset -i NEW_OUT_BOUND_DISCARDS=0
echo " This first entry in this file is the statistics since last boot:"
echo " the other entries are statistics for the previous minute:"
while [ 1=1 ] # Run Foreever
do
netstat -i \
| grep "$INTERFACE" \
| read NAME MTU NETWORK ADDRESS IPKTS IERRS OPKTS OERRS COLL
NEW_PACKETS_IN=$(( $IPKTS - $OLD_PACKETS_IN ))
OLD_PACKETS_IN=$IPKTS
NEW_PACKETS_OUT=$(( $OPKTS - $OLD_PACKETS_OUT ))
OLD_PACKETS_OUT=$OPKTS
NEW_PACKETS_IN_ERR=$(( $IERRS - $OLD_PACKETS_IN_ERR ))
OLD_PACKETS_IN_ERR=$IERRS
NEW_PACKETS_OUT_ERR=$(( $OERRS - $OLD_PACKETS_OUT_ERR ))
OLD_PACKETS_OUT_ERR=$OERRS
NEW_COLLISSIONS=$(( $COLL - $OLD_COLLISSIONS ))
OLD_COLLISSIONS=$COLL
# NEW_IN_BOUND_ERRORS=$(( $4 - $NEW_IN_BOUND_ERRORS ))
# OLD_BOUND_ERRORS=$4
#
# NEW_IN_BOUND_DISCARDS=$(( $3 - $NEW_IN_BOUND_DISCARDS ))
# OUR_BOUND_DISCARDS=$3
date
echo Packets in: $NEW_PACKETS_IN
echo Packet in Errors: $NEW_PACKETS_IN_ERR
echo Packet out: $NEW_PACKETS_OUT
echo Packetout Errors: $NEW_PACKETS_OUT_ERR
echo Collisions: $NEW_COLLISSIONS
echo IN Bound Errors: $NEW_IN_BOUND_ERRORS
echo OUT Bound DISCARDS: $NEW_OUT_BOUND_DISCARDS
echo
sleep 5
typeset -i HOUR=$(date +%H)
if [ $HOUR -eq 18 ]
then
exit
fi
done
#### END OF SCRIPT
]]>
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