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Old 09-23-2003, 09:09 PM   #1
slack66
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Registered: Jul 2003
Location: manila
Distribution: slackware 8 to 9
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bandwithd measurement


iam connected to a wireless broadband internet and aim getting 12kbps thats my internet provider told me. but iam doubt coz if aim downloading files its to slow??? and my isp told me to upgrade to 64kbps ....but how can i be sure that iam getting the right bandwithd that aim paying for??? is there in linuxbox that monitor speed of my bandwithd???
 
Old 09-23-2003, 09:21 PM   #2
J_Szucs
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Registered: Nov 2001
Location: Budapest, Hungary
Distribution: SuSE 6.4-11.3, Dsl linux, FreeBSD 4.3-6.2, Mandrake 8.2, Redhat, UHU, Debian Etch
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Setup (in and out) counter rules on your firewall, and write a small script that periodically reads the counters.
I did the same some days before (with ipfw on FreeBSD) and catched our ISP in providing us half of the bandwidth we pay for. They were very sorry for the mistake...

Here is the script I use with ipfw:

#!/usr/local/bin/bash
IPFW=/sbin/ipfw
AWK=/usr/bin/awk
GREP=/usr/bin/grep
DATE=/bin/date
CAT=/bin/cat
TAIL=/usr/bin/tail
IDO=`date +"%Y%m%d%H%M"`
CNTOUT=`$IPFW -a l | $GREP -E "^00350" | $AWK '{ printf $3 "\n" }'`
CNTIN=`$IPFW -a l | $GREP -E "^00351" | $AWK '{ printf $3 "\n" }'`
LASTOUT=`$TAIL -1 /var/log/nettraffic | $AWK '{ printf $2 "\n" }'`
LASTIN=`$TAIL -1 /var/log/nettraffic | $AWK '{ printf $3 "\n" }'`
CUROUT=`expr $CNTOUT - $LASTOUT`
CURIN=`expr $CNTIN - $LASTIN`
echo $IDO $CNTOUT $CNTIN $CUROUT $CURIN >> /var/log/nettraffic

Do not forget to refer to your firewall manual on how to setup and read counter rules, and correct the above script accordingly. Also check the command paths in the script, since they may be FreeBSD specific. If you run the script by cron in each minute, it will generate a logfile with the following data on each line: time, out counter position, in counter position, out traffic, in traffic. Anyway, the peaks in the traffic log file will show you the actual speed of your network connection.

Last edited by J_Szucs; 09-23-2003 at 09:53 PM.
 
  


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