Linux link monitoring tool

Hello all,

I am looking for a small tool to monitor the status of the network on a
firewall. I have seen a number of larger tool to monitor a bunch of things
but I just want to monitor that the two interface are still passing traffic
and log the information. The firewall does not X windows installed on it so
a console app would be a bonus.

Cheers,

Derek

There are many sniffers that you can use to capture and log network
traffic. Ethereal is good.

http://www.ethereal.com/

You can use tcpdump also,

x86

SuSE Linux 9.0-Intel Pentium M 1.40GHz-512 MB-40
GB-14"-1024x768-4.5-4.9 lbs-CD-RW/DVD-ROM-Intel PRO/1000 Gigabit
Ethernet-Intel PRO/Wireless Network Connection 802.11b

----------------------------------------
The post originated from Linux Forum:
----------------------------------------
http://www.linuxforum.com
http://www.linuxforum.com/forums

Sorry, do not need a sniffer. I have been using tcpdump and etheral for a
while. I need a program that will run as a daemon and monitor the health if
the connection in order to determine downtime.

D.

"x86processor" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> There are many sniffers that you can use to capture and log network
> traffic. Ethereal is good.
>
> http://www.ethereal.com/
>
> You can use tcpdump also,
>
> x86
>
> SuSE Linux 9.0-Intel Pentium M 1.40GHz-512 MB-40
> GB-14"-1024x768-4.5-4.9 lbs-CD-RW/DVD-ROM-Intel PRO/1000 Gigabit
> Ethernet-Intel PRO/Wireless Network Connection 802.11b
>
> ----------------------------------------
> The post originated from Linux Forum:
> ----------------------------------------
> http://www.linuxforum.com
> http://www.linuxforum.com/forums
>
>

Derek Vincent wrote:

> Sorry, do not need a sniffer. I have been using tcpdump and etheral for a
> while. I need a program that will run as a daemon and monitor the health
> if the connection in order to determine downtime.
>
> D.
>
> "x86processor" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> There are many sniffers that you can use to capture and log network
>> traffic. Ethereal is good.
>>
>> http://www.ethereal.com/
>>
>> You can use tcpdump also,
>>
>> x86
>>
>> SuSE Linux 9.0-Intel Pentium M 1.40GHz-512 MB-40
>> GB-14"-1024x768-4.5-4.9 lbs-CD-RW/DVD-ROM-Intel PRO/1000 Gigabit
>> Ethernet-Intel PRO/Wireless Network Connection 802.11b
>>
>> ----------------------------------------
>> The post originated from Linux Forum:
>> ----------------------------------------
>> http://www.linuxforum.com
>> http://www.linuxforum.com/forums
>>
Check out MRTG. Multi Router Traffic Grapher....Based on SNMP daemon
process and provides nice graphical of the link depending upon how you wish
to monitor the link...
http://people.ee.ethz.ch/~oetiker/webtools/mrtg/

Derek Vincent <(E-Mail Removed)!> wrote:
> Hello all,
>
> I am looking for a small tool to monitor the status of the network on a
> firewall.

If its peering with a router at the other end, you might consider
heartbeat.

Package: heartbeat
Description: Subsystem for High-Availability Linux
heartbeat is a basic heartbeat subsystem for Linux-HA.
It will run scripts at initialisation, and when machines go up or down.
This version will also perform IP address takeover using gratuitous ARPs.
It works correctly for a 2-node configuration, and is extensible to larger
configurations.
It implements the following kinds of heartbeats:
* Bidirectional Serial Rings ("raw" serial ports)
* UDP/IP broadcast (ethernet, etc)

--
Cameron Kerr
(E-Mail Removed) : http://nzgeeks.org/cameron/
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