Friday, July 9, 2010

Top 10 Wireshark Filters (by Chris Greer)


The filtering capabilities of Wireshark are very comprehensive. You can filter on just about any field of any protocol, even down to the HEX values in a data stream. Sometimes though, the hardest part about setting a filter in Wireshark is remembering the syntax! So below are the top 10 display filters that I use in Wireshark. Please comment below and add any common ones that you use as well.

1. ip.addr == [Sets a filter for any packet with, as either the source or dest]

2. ip.addr== && ip.addr== [sets a conversation filter between the two defined IP addresses]

3. http or dns [sets a filter to display all http and dns]

4. tcp.port==4000 [sets a filter for any TCP packet with 4000 as a source or dest port]

5. tcp.flags.reset==1 [displays all TCP resets]

6. http.request [displays all HTTP GET requests]

7. tcp contains traffic [displays all TCP packets that contain the word ‘traffic’. Excellent when searching on a specific string or user ID]

8. !(arp or icmp or dns) [masks out arp, icmp, dns, or whatever other protocols may be background noise. Allowing you to focus on the traffic of interest]

9. udp contains 33:27:58 [sets a filter for the HEX values of 0x33 0x27 0x58 at any offset]

10. tcp.analysis.retransmission [displays all retransmissions in the trace. Helps when tracking down slow application performance and packet loss]

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