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Wireshark is an amazing graphical packet analysis tool
(“Wireshark” has hearts around it)
tshark is the command line version of Wireshark
it can do 100x more things than tcpdump (heart)
-Y
filter which packets are captured
tshark -y
'http.request.method
== "GET"
(uses Wireshark’s SUPER POWERFUL filter language)
-d
is for “decode as”
tells tshark what protocol to interpret a port as
Example: 8888 is often HTTP!
$tshark
-d tcp.port==8888,http
-T FORMAT
Output format. My favourites:
- json
- fields: csv/tsv
(for these above two you can specify which fields you want with
-e) - text: default summary
-e
Which fields to output. Ex:
$tshark -T fields
-e http.request.method
-e http.request.uri
-e ip.dst
(supports WAY more protocols than HTTP)
GET /foo 92.183.216.34
POST /bar 10.23.38.132
-r file.pcap
analyze packets from a file instead of the network
-w
(same as tcpdump)
Write captured packets to a file. If -w file.pcap has permission issues, try tshark -w - > file.pcap