TShark: Difference between revisions
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[[ | [[Category:MySQL]] | ||
[[ | [[Category:Security]] | ||
=TShark= | =TShark= | ||
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The ultimate tool to sniff network traffic when you have no X. It analyzes the traffic as wireshark does. Great tool! | The ultimate tool to sniff network traffic when you have no X. It analyzes the traffic as wireshark does. Great tool! | ||
==DNS Traffic== | |||
<syntaxhighlight lang=bash> | |||
# tshark -n -T fields -e frame.time -e dns.id -e ip.src -e ip.dst -e dns.qry.name -f 'port 53' | |||
</syntaxhighlight> | |||
==MySQL traffic== | ==MySQL traffic== | ||
To look on an application server for MySQL traffic you can use this line: | To look on an application server for MySQL traffic you can use this line: | ||
< | <syntaxhighlight lang=bash> | ||
# IFACE=eth0 ; tshark -i ${IFACE} -d tcp.port==3306,mysql -R "eth.addr eq $(ip link show ${IFACE} | awk '$1 ~ /link\/ether/{print $2}')" -T fields -e mysql.query 'port 3306' | # IFACE=eth0 ; tshark -i ${IFACE} -d tcp.port==3306,mysql -R "eth.addr eq $(ip link show ${IFACE} | awk '$1 ~ /link\/ether/{print $2}')" -T fields -e mysql.query 'port 3306' | ||
</ | </syntaxhighlight> | ||
newer versions of tshark: | |||
<syntaxhighlight lang=bash> | |||
# IFACE=ens192 ; tshark -i ${IFACE} -d tcp.port==3306,mysql -Y "eth.addr eq $(ip link show ${IFACE} | awk '$1 ~ /link\/ether/{print $2}')" -T fields -e mysql.auth_plugin -e mysql.client_auth_plugin -e mysql.error_code -e mysql.error.message -e mysql.message -e mysql.user -e mysql.passwd -e mysql.command 'port 3306' | |||
</syntaxhighlight> | |||
The little awk magic selects only pakets which are from our ethernet address on interface ''IFACE''. | The little awk magic selects only pakets which are from our ethernet address on interface ''IFACE''. | ||
==Radius traffic== | |||
Find client with macaddress fc-18-3c-4a-c1-fa : | |||
<syntaxhighlight lang=bash> | |||
# tshark -Y "tls.handshake.type == 1" -T fields -e frame.number -e ip.src -e tls.handshake.version -e radius.Calling_Station_Id -Y 'radius.Calling_Station_Id=="fc-18-3c-4a-c1-fa"' -f "udp port 1812" -V | |||
Running as user "root" and group "root". This could be dangerous. | |||
Capturing on 'ens192' | |||
785 10.155.1.23 fc-18-3c-4a-c1-fa | |||
788 10.155.1.23 0x00000303 fc-18-3c-4a-c1-fa <-- 0x00000303 is TLS handshake version 1.2 , see table below | |||
790 10.155.1.23 fc-18-3c-4a-c1-fa | |||
792 10.155.1.23 fc-18-3c-4a-c1-fa | |||
794 10.155.1.23 fc-18-3c-4a-c1-fa | |||
</syntaxhighlight> | |||
With older tshark versions try: | |||
<syntaxhighlight lang=bash> | |||
# tshark -Y "ssl.handshake.type == 1" -T fields -e frame.number -e ip.src -e ssl.handshake.version -e radius.Calling_Station_Id -Y 'radius.Calling_Station_Id=="8c-85-90-1f-03-ff"' -f "udp port 1812" | |||
</syntaxhighlight> | |||
==Duplicate ACKs== | ==Duplicate ACKs== | ||
< | <syntaxhighlight lang=bash> | ||
# tshark -i eth1 -Y tcp.analysis.duplicate_ack | # tshark -i eth1 -Y tcp.analysis.duplicate_ack | ||
</ | </syntaxhighlight> | ||
==Finding TCP problems== | ==Finding TCP problems== | ||
< | <syntaxhighlight lang=bash> | ||
# tshark -i eth1 -Y 'expert.message == "Retransmission (suspected)" || expert.message == "Duplicate ACK (#1)" || expert.message == "Out-Of-Order segment"' | # tshark -i eth1 -Y 'expert.message == "Retransmission (suspected)" || expert.message == "Duplicate ACK (#1)" || expert.message == "Out-Of-Order segment"' | ||
</ | </syntaxhighlight> | ||
==Decode SSL Connections== | ==Decode SSL Connections== | ||
For example show the used TLS-Versions. | For example show the used TLS-Versions lower than 1.2. | ||
<pre> | <pre> | ||
Supported Version: TLS 1.3 (0x0304) | Supported Version: TLS 1.3 (0x0304) | ||
| Line 34: | Line 61: | ||
Supported Version: TLS 1.0 (0x0301) | Supported Version: TLS 1.0 (0x0301) | ||
</pre> | </pre> | ||
< | <syntaxhighlight lang=bash> | ||
$ tshark -n -f 'dst port 1812 or dst port 2083' -Y "ssl.handshake.version<0x00000303" -T fields -e ip.src_host -e ip.dst_host -e tcp.dstport -e udp.dstport -e ssl.handshake.version | |||
192.168.1.87 192.168.1.140 2083 | 192.168.1.87 192.168.1.140 2083 0x00000301 | ||
10.155.4.97 192.168.1.141 1812 | 10.155.4.97 192.168.1.141 1812 0x00000301 | ||
192.168.1.85 192.168.1.140 2083 | 192.168.1.85 192.168.1.140 2083 0x00000301 | ||
... | ... | ||
</ | </syntaxhighlight> | ||
or for https: | |||
<syntaxhighlight lang=bash> | |||
$ tshark -i eth0 -n -f 'dst port 443' -Y "ssl.handshake.version<0x00000303" -T fields -e ip.src_host -e ip.dst_host -e tcp.dstport -e ssl.handshake.version | |||
</syntaxhighlight> | |||
Latest revision as of 13:55, 20 February 2024
TShark
TShark is the terminal based wireshark.
The ultimate tool to sniff network traffic when you have no X. It analyzes the traffic as wireshark does. Great tool!
DNS Traffic
# tshark -n -T fields -e frame.time -e dns.id -e ip.src -e ip.dst -e dns.qry.name -f 'port 53'
MySQL traffic
To look on an application server for MySQL traffic you can use this line:
# IFACE=eth0 ; tshark -i ${IFACE} -d tcp.port==3306,mysql -R "eth.addr eq $(ip link show ${IFACE} | awk '$1 ~ /link\/ether/{print $2}')" -T fields -e mysql.query 'port 3306'
newer versions of tshark:
# IFACE=ens192 ; tshark -i ${IFACE} -d tcp.port==3306,mysql -Y "eth.addr eq $(ip link show ${IFACE} | awk '$1 ~ /link\/ether/{print $2}')" -T fields -e mysql.auth_plugin -e mysql.client_auth_plugin -e mysql.error_code -e mysql.error.message -e mysql.message -e mysql.user -e mysql.passwd -e mysql.command 'port 3306'
The little awk magic selects only pakets which are from our ethernet address on interface IFACE.
Radius traffic
Find client with macaddress fc-18-3c-4a-c1-fa :
# tshark -Y "tls.handshake.type == 1" -T fields -e frame.number -e ip.src -e tls.handshake.version -e radius.Calling_Station_Id -Y 'radius.Calling_Station_Id=="fc-18-3c-4a-c1-fa"' -f "udp port 1812" -V
Running as user "root" and group "root". This could be dangerous.
Capturing on 'ens192'
785 10.155.1.23 fc-18-3c-4a-c1-fa
788 10.155.1.23 0x00000303 fc-18-3c-4a-c1-fa <-- 0x00000303 is TLS handshake version 1.2 , see table below
790 10.155.1.23 fc-18-3c-4a-c1-fa
792 10.155.1.23 fc-18-3c-4a-c1-fa
794 10.155.1.23 fc-18-3c-4a-c1-fa
With older tshark versions try:
# tshark -Y "ssl.handshake.type == 1" -T fields -e frame.number -e ip.src -e ssl.handshake.version -e radius.Calling_Station_Id -Y 'radius.Calling_Station_Id=="8c-85-90-1f-03-ff"' -f "udp port 1812"
Duplicate ACKs
# tshark -i eth1 -Y tcp.analysis.duplicate_ack
Finding TCP problems
# tshark -i eth1 -Y 'expert.message == "Retransmission (suspected)" || expert.message == "Duplicate ACK (#1)" || expert.message == "Out-Of-Order segment"'
Decode SSL Connections
For example show the used TLS-Versions lower than 1.2.
Supported Version: TLS 1.3 (0x0304)
Supported Version: TLS 1.2 (0x0303)
Supported Version: TLS 1.1 (0x0302)
Supported Version: TLS 1.0 (0x0301)
$ tshark -n -f 'dst port 1812 or dst port 2083' -Y "ssl.handshake.version<0x00000303" -T fields -e ip.src_host -e ip.dst_host -e tcp.dstport -e udp.dstport -e ssl.handshake.version
192.168.1.87 192.168.1.140 2083 0x00000301
10.155.4.97 192.168.1.141 1812 0x00000301
192.168.1.85 192.168.1.140 2083 0x00000301
...
or for https:
$ tshark -i eth0 -n -f 'dst port 443' -Y "ssl.handshake.version<0x00000303" -T fields -e ip.src_host -e ip.dst_host -e tcp.dstport -e ssl.handshake.version
