Ciao, scusate se la domanda può sembrare stupida...

Io ho bisogno di monitorare il traffico sulla scheda di rete di un PC con linux. ho letto alcuni 3D in cui veniva consigliato l'utilizzo di mrtg, l'ho scaricato, ma non ho trovato il modo di configurarlo per farlo funzionare in locale,

ho provato a configurarlo in questo modo:
codice:
### Global Config Options

#  for UNIX
# WorkDir: /home/http/mrtg

#  or for NT
# WorkDir: c:\mrtgdata

### Global Defaults

#  to get bits instead of bytes and graphs growing to the right
# Options[_]: growright, bits

EnableIPv6: no
WorkDir: /mnt/data/http/www/mrtg
Options[_]: bits, growright

######################################################################
# System:
# Description: Prestige 660HW-61
# Contact:
# Location:
######################################################################


### Interface 1 >> Descr: 'enet0' | Name: '' | Ip: '192.168.1.151' | Eth: '0' ###

Target[192.168.1.151_1]: 1:public@192.168.1.151:
SetEnv[192.168.1.151_1]: MRTG_INT_IP="192.168.1.151" MRTG_INT_DESCR="enet0"
MaxBytes[192.168.1.151_1]: 12500000
Title[192.168.1.151_1]: Traffic Analysis for 151 --
PageTop[192.168.1.151_1]: <H1>Traffic Analysis for 151 -- </H1>
 <TABLE>
   <TR><TD>System:</TD>     <TD> in </TD></TR>
   <TR><TD>Maintainer:</TD> <TD></TD></TR>
   <TR><TD>Description:</TD><TD>enet0  </TD></TR>
   <TR><TD>ifType:</TD>     <TD>ethernetCsmacd (6)</TD></TR>
   <TR><TD>ifName:</TD>     <TD></TD></TR>
   <TR><TD>Max Speed:</TD>  <TD>100.0 Mbits/s</TD></TR>
   <TR><TD>Ip:</TD>         <TD>192.168.1.151 ()</TD></TR>
 </TABLE>
però quando lo avvio mi da:
codice:
SNMP Error:
no response received
SNMPv1_Session (remote host: "192.168.1.151" [192.168.1.151].161)
                  community: "public"
                 request ID: 811416559
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
 at /mnt/data/http/src/mrtg-2.11.1/bin/../lib/mrtg2/SNMP_util.pm line 490
SNMPGET Problem for ifInOctets.1 ifOutOctets.1 sysUptime sysName on public@192.168.1.151::::::v4only
 at ./mrtg line 1849
WARNING: skipping because at least the query for ifInOctets.1 on  192.168.1.151 did not succeed
WARNING: no data for ifInOctets&ifOutOctets:public@192.168.1.151. Skipping further queries for Host 192.168.1.151 in this round.
ERROR: Target[192.168.1.151_1][_IN_] ' $target->[0]{$mode} ' did not eval into defined data
ERROR: Target[192.168.1.151_1][_OUT_] ' $target->[0]{$mode} ' did not eval into defined data

192.168.1.151 è l'indirizzo di localhost.
dove ho sbagliato?

Grazie in anticipo