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New Member

How do I trace traffic source?

I have a site-2-site IPSec vpn between an 1801 ISR and an ASA 5510. Monitoring the vpn on the ASA, I see there is constant traffic on it, when I would have expected only intermittent traffic. How can I trace what is actually causing traffic to cross the vpn? I suspect something at the ISR end is sending packets to the ASA network, but how can I find out what?

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New Member

Re: How do I trace traffic source?

Cool

4 REPLIES
New Member

Re: How do I trace traffic source?

New Member

Re: How do I trace traffic source?

Hi,

I don't have a Netflow box, and it looks very complicated!!

What I really need is a simple metod of tracing the source IP of traffic going through the VPN.

New Member

Re: How do I trace traffic source?

Found the answer: Packet capture wizard in the ASA can track all packets between any interface or IP address/range. By capturing from the source subnet, then sending the output to Wireshark, the culprit is revealed.

New Member

Re: How do I trace traffic source?

Cool

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