I've given all of our machines behind the firewalls both reverse and forward domain names and ntop can tell me that bob.internal has used 25MB of traffic in the time that I've been monitoring and has used it to contact these servers.
I've got a ASUS K7V w/PC 133 RAM and a Athlon 700 running Mandrake 7.0. It's been working flawlessly since day 1. With the ide patch I've got UDMA 66 working flawlessly and can stress this box out without it flinching at all.
Regardless, if there's no data passing by the interface at the instant that the mrtg cron job is running nothing appears to show up in the graphs.
In order to test it (and make sure it worked when I was setting it up) I had to make sure to have traffic going through the interfaces I was monitoring in order to get anything on the graphs.
MRTG uses snmp to graph its stats. I had to download and install the cmu-snmp-linux (look at freshmeat for the actual url) in order to get snmp to work. MRTG also needs to know what physical interface to monitor so you have to tell it in the config file. If you have multiple interfaces it gets a little tricky to figure out which one to monitor but it can be done.
Once you've got the snmp stuff installed you need to find out how many interfaces it sees:
# snmpwalk localhost public interfaces
You should see something like this:
A lot of text scrolling by real fast - look specifically for this:
interfaces.ifTable.ifEntry.ifOperStatus.1 = INTEGER: up (1) interfaces.ifTable.ifEntry.ifOperStatus.2 = INTEGER: up (1) interfaces.ifTable.ifEntry.ifOperStatus.3 = INTEGER: up (1) interfaces.ifTable.ifentry.ifOperStatus.4 = INTEGER: down (0)
I have four interfaces (lo, eth0, eth1 and eth2 [three are up and eth2 is down])
Look farther down the list for the statistics on that port ( look for interfaces.ifTable.ifEntry.ifInOctets.1 = COUNTER: some-big-number-here - this line counts the packets that come in over interface 1) and chose which number (1, 2, 3, or whatever you have) to put in your mrtg.conf file.
My mrtg.conf file looks like this:
Target[domainname]: 3:public@domainname.here
I've set it to monitor interface 3 in this config line. You can have multiple configs so that you can monitor multiple interfaces. I have both my main ethernet interfaces being monitored.
Something else you may want to look at to accomplish accounting for ip stuff is ipac (look at freshmeat for a url). It doesn't use snmp but instead uses the proc filesystem and counters that you define [you can watch any sort of traffic you want: nntp, smtp, www, pop3, imap - in any direction that you specify] to create graphs that show you you much traffic you've had pass through that machine.
MRTG just counts the traffic currently going by the interface when your cron job kicks in and tells it to look at the interface you specify - it doesn't count all the traffic that went by during the time period between cron jobs. MRTG creates nicer graphs though.;-)
ipac actually graphs the amount of packets that went by - it doesn't matter if there's no traffic going by when you run the stats-fetching tool (fetchipac).
Hope that helped.
Re:it's on the ftp server now...or is it?
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LinuxPPC R5 Ships
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I downloaded and installed it - it seems to be the final (got lots of updated rpm's) but I'm not totally sure.
Slashdot Mirror
Take a look at ntop. It does this sort of thing:
I've given all of our machines behind the firewalls both reverse and forward domain names and ntop can tell me that bob.internal has used 25MB of traffic in the time that I've been monitoring and has used it to contact these servers.
I've got a ASUS K7V w/PC 133 RAM and a Athlon 700 running Mandrake 7.0. It's been working flawlessly since day 1. With the ide patch I've got UDMA 66 working flawlessly and can stress this box out without it flinching at all.
I highly recommend it.
Regardless, if there's no data passing by the interface at the instant that the mrtg cron job is running nothing appears to show up in the graphs.
In order to test it (and make sure it worked when I was setting it up) I had to make sure to have traffic going through the interfaces I was monitoring in order to get anything on the graphs.
I didn't get anything on the graphs otherwise.
MRTG uses snmp to graph its stats. I had to download and install the cmu-snmp-linux (look at freshmeat for the actual url) in order to get snmp to work. MRTG also needs to know what physical interface to monitor so you have to tell it in the config file. If you have multiple interfaces it gets a little tricky to figure out which one to monitor but it can be done.
;-)
Once you've got the snmp stuff installed you need to find out how many interfaces it sees:
# snmpwalk localhost public interfaces
You should see something like this:
A lot of text scrolling by real fast - look specifically for this:
interfaces.ifTable.ifEntry.ifOperStatus.1 = INTEGER: up (1)
interfaces.ifTable.ifEntry.ifOperStatus.2 = INTEGER: up (1)
interfaces.ifTable.ifEntry.ifOperStatus.3 = INTEGER: up (1)
interfaces.ifTable.ifentry.ifOperStatus.4 = INTEGER: down (0)
I have four interfaces (lo, eth0, eth1 and eth2 [three are up and eth2 is down])
Look farther down the list for the statistics on that port ( look for interfaces.ifTable.ifEntry.ifInOctets.1 = COUNTER: some-big-number-here - this line counts the packets that come in over interface 1) and chose which number (1, 2, 3, or whatever you have) to put in your mrtg.conf file.
My mrtg.conf file looks like this:
Target[domainname]: 3:public@domainname.here
I've set it to monitor interface 3 in this config line. You can have multiple configs so that you can monitor multiple interfaces. I have both my main ethernet interfaces being monitored.
Something else you may want to look at to accomplish accounting for ip stuff is ipac (look at freshmeat for a url). It doesn't use snmp but instead uses the proc filesystem and counters that you define [you can watch any sort of traffic you want: nntp, smtp, www, pop3, imap - in any direction that you specify] to create graphs that show you you much traffic you've had pass through that machine.
MRTG just counts the traffic currently going by the interface when your cron job kicks in and tells it to look at the interface you specify - it doesn't count all the traffic that went by during the time period between cron jobs. MRTG creates nicer graphs though.
ipac actually graphs the amount of packets that went by - it doesn't matter if there's no traffic going by when you run the stats-fetching tool (fetchipac).
Hope that helped.
I downloaded and installed it - it seems to be the final (got lots of updated rpm's) but I'm not totally sure.
It sure beats R4 right out of the box though...