Multi-Tap Network Packet Capturing: Difference between revisions
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The diagram depicted below shows an example '''Multi-Tap Capture Setup''' for monitoring GigaBit traffic across a firewall boundary. We will explore the capturing of packets as they transverse the firewall and undergo both '''Network''' and '''Port Address Translation'''. | The diagram depicted below shows an example '''Multi-Tap Capture Setup''' for monitoring GigaBit traffic across a firewall boundary. We will explore the capturing of packets as they transverse the firewall and undergo both '''Network''' and '''Port Address Translation'''. | ||
[[Image:Nst_quad_tap_networking2.png|center|thumb|800px|Multi-Tap PacketCapture]] | [[Image:Nst_quad_tap_networking2.png|center|thumb|800px|Multi-Tap PacketCapture: Packet Capture Across A Firewall Using NAT/PAT]] | ||
== Multi-Tap Network Packet Capture: Traffic Between Gigabit Switches == | == Multi-Tap Network Packet Capture: Traffic Between Gigabit Switches == | ||
Revision as of 07:09, 2 July 2008
Overview
This section will demonstrate the use of Multi-Tap Network Packet Capture with NST. The NST WUI implementation supports simultaneous Packet Capture on up to 4 network interfaces (Quad Tap) per multi-tap capture session. NST uses the Wireshark network protocol analyzer suite for network packet capture. The light-weight network packet capture tool: "dumpcap" is used as the capture engine.
When capturing packets at Gigabit Ethernet rates and one needs total visibility on the link, then a passive tap is required. Net Optics, a global leader in passive monitoring, makes an excellent 10/100/1000BaseT Tap (TP-CU3) for passively allowing access to monitor GigaBit traffic.
Multi-Tap Network Packet Capture: NAT/PAT Traffic
The diagram depicted below shows an example Multi-Tap Capture Setup for monitoring GigaBit traffic across a firewall boundary. We will explore the capturing of packets as they transverse the firewall and undergo both Network and Port Address Translation.
Multi-Tap Network Packet Capture: Traffic Between Gigabit Switches
The diagram depicted below shows an example Dual-Tap Capture Setup for monitoring GigaBit traffic between 2 Gigabit switches. In this case a generic notebook computer was used and configured with 3 network interfaces (A built-in Gigabit LAN adapter, a Gigabit LAN adapter PC-Card and a built-in 802.11g/n wireless adapter for secure remote access and control of NST).
