![]() You can change the prefix name by redefining the HTTP::extraction_prefix variable. You can filter the output to obtain only the GET requests: bro-cut id.orig_h id.resp_h method host uri 'HTTP::extract_file_type = /video\/avi/'īro sniffs the MIME type of a HTTP body and if it matches the regular expression /video\/avi/, it creates a file with the prefix http-item. The one you are interested in is http.log. This invocation generates a bunch of log files in the current directory. Simply run it with your trace file: bro -r See TECH221639 ( Checking for valid HTTP POST traffic when no HTTP traffic seen on Monitor) for details how to use TFAT.While this may be doable with Wireshark, it is orders of magnitude easier with Bro. Use the Traffic Feed Analyzer Tool (TFAT) to verify this. ![]() In this view you will see the specific HTTP Post data that was sent.Īnother thing to verify is the traffic feed the monitor is getting is clean. You probably want to analyze the traffic going through your ethernet. If results are returned, you should be able to right click on any of the entries and choose "Follow TCP Stream". You will now see a pop-up window on your screen. When HTTP POSTs are seen in the captured packets, traffic will be reported. The /f tells the command to resolve the external ip addresses as well. This will show you a list of the connections to your local interface. You could use the command prompt by typing the command netstat /f. There is valid HTTP traffic, but not traffic which needs to be examined by DLP - that is, the traffic only contains GET requests or HTTP responses.Ĭonfirm that the SPAN or TAP is configured to send traffic of the correct type (and direction) to the Monitor. However, Wireshark is much more comprehensive in terms of network protocol monitoring and analysis. If none of the packets remain after applying the above filter, then no HTTP Post data is seen. Open the capture in Wireshark, and apply a filter for HTTP POST to the pcap file: ![]() If customers are using an Endace card follow this KB to create a packet capture that is readable by Wireshark: TECH221214 ( How do I check for traffic on an Endace Card?). Just open the packet capture created by tcpdump in wirehark to filter it. For details on using tcpdump, please see TECH221427 ( Use tcpdump to do a packet capture). On Linux systems, you can install wireshark to do a packet capture, but using the built in tool tcpdump will work, too. First you'll need to download and install Wireshark ( ) on the Network Monitor where traffic should be going. ![]()
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