fnbgppl
asked on
Capturing IP traffic
I have a closed VPN device on my Lan that I need to see what traffic is coming into it. For security reasons No one can access the box internally. However, I am trying to route specific traffic to it. Theoretically everything is setup correctly, however it is not working. I need to see if the data is being routed to the vpn device or not. This way I can tell if I'm having a routing issue or an authentication issue. I would like to use an old broadcasting HUB to capture the traffic, but I do not have access to one. I also tried setting putting a seperate firewall on the network with the same ip as the vpn device, but that did not work either. Any help on this is greatly appreciated. For more specifics on the routing refer to
Q_21839605.
FNBGPPL
Q_21839605.
FNBGPPL
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ethereal will monitor all traffic on your network, from there you can filter out what you want to monitor. I use it when we have issues with our PIXs. Take a look at it and see if it will fit your needs.
ASKER
valicon,
I've got Ethereal up, but I don't understand the data it's returning. I am filtering through the user guide, is there a more condensed version.
I've got Ethereal up, but I don't understand the data it's returning. I am filtering through the user guide, is there a more condensed version.
Ethereal will show you all traffic on the network. Look for the IP addresses of the devices, they should show up.
fnbgppl,
Do you need any further assistance with this issue?
Do you need any further assistance with this issue?
ASKER
Valicon,
I'm still trying to get everything to work. I ended up changing the ip on the laptop to the ip of the vpn device, but I was unable to view the traffic. However, Ethereal is the tool that I need to use I just have to get it in the right place. Thank you for your assistance. Do you know of somewhere that gives a succinct representation of how to interpret the logs?
FNBGPPL
I'm still trying to get everything to work. I ended up changing the ip on the laptop to the ip of the vpn device, but I was unable to view the traffic. However, Ethereal is the tool that I need to use I just have to get it in the right place. Thank you for your assistance. Do you know of somewhere that gives a succinct representation of how to interpret the logs?
FNBGPPL
The only documentation I know of is on the ethereal site. I also wish they had a mini tutorial as well, I think it would help many people.
ASKER
Thanks
ASKER
I am unfamiliar with how to use ethereal. The path I need to monitor is between a firewall and a VPN device. Is ethereal capable of monitoring this traffic?