forked from osmocom/wireshark
![Peter Wu](/assets/img/avatar_default.png)
The sshdump command is typically not invoked directly, and I need a place to refer people to for configuring Wireshark. Change-Id: I10fb3d88dbb3aea0bfcaf22aac90b36a7a8dc814 Reviewed-on: https://code.wireshark.org/review/37897 Petri-Dish: Peter Wu <peter@lekensteyn.nl> Tested-by: Petri Dish Buildbot Reviewed-by: Martin Kaiser <wireshark@kaiser.cx> Reviewed-by: Dario Lombardo <lomato@gmail.com>
273 lines
9 KiB
Text
273 lines
9 KiB
Text
=begin man
|
|
|
|
=encoding utf8
|
|
|
|
=end man
|
|
|
|
=head1 NAME
|
|
|
|
sshdump - Provide interfaces to capture from a remote host through SSH using a remote capture binary.
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
B<sshdump>
|
|
S<[ B<--help> ]>
|
|
S<[ B<--version> ]>
|
|
S<[ B<--extcap-interfaces> ]>
|
|
S<[ B<--extcap-dlts> ]>
|
|
S<[ B<--extcap-interface>=E<lt>interfaceE<gt> ]>
|
|
S<[ B<--extcap-config> ]>
|
|
S<[ B<--extcap-capture-filter>=E<lt>capture filterE<gt> ]>
|
|
S<[ B<--capture> ]>
|
|
S<[ B<--fifo>=E<lt>path to file or pipeE<gt> ]>
|
|
S<[ B<--remote-host>=E<lt>IP addressE<gt> ]>
|
|
S<[ B<--remote-port>=E<lt>TCP portE<gt> ]>
|
|
S<[ B<--remote-username>=E<lt>usernameE<gt> ]>
|
|
S<[ B<--remote-password>=E<lt>passwordE<gt> ]>
|
|
S<[ B<--sshkey>=E<lt>public key path<gt> ]>
|
|
S<[ B<--remote-interface>=E<lt>interfaceE<gt> ]>
|
|
S<[ B<--remote-capture-command>=E<lt>capture commandE<gt> ]>
|
|
S<[ B<--remote-sudo> ]>
|
|
|
|
B<sshdump>
|
|
S<B<--extcap-interfaces>>
|
|
|
|
B<sshdump>
|
|
S<B<--extcap-interface>=E<lt>interfaceE<gt>>
|
|
S<B<--extcap-dlts>>
|
|
|
|
B<sshdump>
|
|
S<B<--extcap-interface>=E<lt>interfaceE<gt>>
|
|
S<B<--extcap-config>>
|
|
|
|
B<sshdump>
|
|
S<B<--extcap-interface>=E<lt>interfaceE<gt>>
|
|
S<B<--fifo>=E<lt>path to file or pipeE<gt>>
|
|
S<B<--capture>>
|
|
S<B<--remote-host=myremotehost>>
|
|
S<B<--remote-port=22>>
|
|
S<B<--remote-username=user>>
|
|
S<B<--remote-interface=eth2>>
|
|
S<B<--remote-capture-command='tcpdump -U -i eth0 -w-'>>
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
B<Sshdump> is an extcap tool that allows one to run a remote capture
|
|
tool over a SSH connection. The requirement is that the capture
|
|
executable must have the capabilities to capture from the wanted
|
|
interface.
|
|
|
|
The feature is functionally equivalent to run commands like
|
|
|
|
$ ssh remoteuser@remotehost -p 22222 'tcpdump -U -i IFACE -w -' > FILE &
|
|
$ wireshark FILE
|
|
|
|
$ ssh remoteuser@remotehost '/sbin/dumpcap -i IFACE -P -w - -f "not port 22"' > FILE &
|
|
$ wireshark FILE
|
|
|
|
$ ssh somehost dumpcap -P -w - -f udp | tshark -i -
|
|
|
|
Typically sshdump is not invoked directly. Instead it can be configured through
|
|
the Wireshark graphical user interface or its command line. The following will
|
|
start Wireshark and start capturing from host B<remotehost>:
|
|
|
|
$ wireshark '-oextcap.sshdump.remotehost:"remotehost"' -i sshdump -k
|
|
|
|
To explicitly control the remote capture command:
|
|
|
|
$ wireshark '-oextcap.sshdump.remotehost:"remotehost"' \
|
|
'-oextcap.sshdump.remotecapturecommand:"tcpdump -i eth0 -Uw- not port 22"' \
|
|
-i sshdump -k
|
|
|
|
Supported interfaces:
|
|
|
|
=over 4
|
|
|
|
=item 1. ssh
|
|
|
|
=back
|
|
|
|
=head1 OPTIONS
|
|
|
|
=over 4
|
|
|
|
=item --help
|
|
|
|
Print program arguments.
|
|
|
|
=item --version
|
|
|
|
Print program version.
|
|
|
|
=item --extcap-interfaces
|
|
|
|
List available interfaces.
|
|
|
|
=item --extcap-interface=E<lt>interfaceE<gt>
|
|
|
|
Use specified interfaces.
|
|
|
|
=item --extcap-dlts
|
|
|
|
List DLTs of specified interface.
|
|
|
|
=item --extcap-config
|
|
|
|
List configuration options of specified interface.
|
|
|
|
=item --capture
|
|
|
|
Start capturing from specified interface and write raw packet data to the location specified by --fifo.
|
|
|
|
=item --fifo=E<lt>path to file or pipeE<gt>
|
|
|
|
Save captured packet to file or send it through pipe.
|
|
|
|
=item --remote-host=E<lt>remote hostE<gt>
|
|
|
|
The address of the remote host for capture.
|
|
|
|
=item --remote-port=E<lt>remote portE<gt>
|
|
|
|
The SSH port of the remote host.
|
|
|
|
=item --remote-username=E<lt>usernameE<gt>
|
|
|
|
The username for ssh authentication.
|
|
|
|
=item --remote-password=E<lt>passwordE<gt>
|
|
|
|
The password to use (if not ssh-agent and pubkey are used). WARNING: the
|
|
passwords are stored in plaintext and visible to all users on this system. It is
|
|
recommended to use keyfiles with a SSH agent.
|
|
|
|
=item --sshkey=E<lt>SSH private key pathE<gt>
|
|
|
|
The path to a private key for authentication.
|
|
|
|
=item --remote-interface=E<lt>remote interfaceE<gt>
|
|
|
|
The remote network interface to capture from.
|
|
|
|
=item --remote-capture-command=E<lt>capture commandE<gt>
|
|
|
|
A custom remote capture command that produces the remote stream that is shown in Wireshark.
|
|
The command must be able to produce a PCAP stream written to STDOUT. See below for more
|
|
examples.
|
|
|
|
If using tcpdump, use the B<-w-> option to ensure that packets are written to
|
|
standard output (stdout). Include the B<-U> option to write packets as soon as
|
|
they are received.
|
|
|
|
When specified, this command will be used as is, options such as the capture
|
|
filter (B<--extcap-capture-filter>) will not be appended.
|
|
|
|
=item --extcap-capture-filter=E<lt>capture filterE<gt>
|
|
|
|
The capture filter. It corresponds to the value provided via the B<tshark -f>
|
|
option, and the Capture Filter field next to the interfaces list in the
|
|
Wireshark interface.
|
|
|
|
=back
|
|
|
|
=head1 EXAMPLES
|
|
|
|
To see program arguments:
|
|
|
|
sshdump --help
|
|
|
|
To see program version:
|
|
|
|
sshdump --version
|
|
|
|
To see interfaces:
|
|
|
|
sshdump --extcap-interfaces
|
|
|
|
Only one interface (sshdump) is supported.
|
|
|
|
Output:
|
|
interface {value=sshdump}{display=SSH remote capture}
|
|
|
|
To see interface DLTs:
|
|
|
|
sshdump --extcap-interface=sshdump --extcap-dlts
|
|
|
|
Output:
|
|
dlt {number=147}{name=sshdump}{display=Remote capture dependent DLT}
|
|
|
|
To see interface configuration options:
|
|
|
|
sshdump --extcap-interface=sshdump --extcap-config
|
|
|
|
Output:
|
|
|
|
arg {number=0}{call=--remote-host}{display=Remote SSH server address}{type=string}
|
|
{tooltip=The remote SSH host. It can be both an IP address or a hostname}{required=true}{group=Server}
|
|
arg {number=1}{call=--remote-port}{display=Remote SSH server port}{type=unsigned}
|
|
{tooltip=The remote SSH host port (1-65535)}{range=1,65535}{group=Server}
|
|
arg {number=2}{call=--remote-username}{display=Remote SSH server username}{type=string}
|
|
{tooltip=The remote SSH username. If not provided, the current user will be used}{group=Authentication}
|
|
arg {number=3}{call=--remote-password}{display=Remote SSH server password}{type=password}
|
|
{tooltip=The SSH password, used when other methods (SSH agent or key files) are unavailable.}{group=Authentication}
|
|
arg {number=4}{call=--sshkey}{display=Path to SSH private key}{type=fileselect}
|
|
{tooltip=The path on the local filesystem of the private ssh key}{group=Authentication}
|
|
arg {number=5}{call=--sshkey-passphrase}{display=SSH key passphrase}{type=password}
|
|
{tooltip=Passphrase to unlock the SSH private key}{group=Authentication}
|
|
arg {number=6}{call=--proxycommand}{display=ProxyCommand}{type=string}
|
|
{tooltip=The command to use as proxy for the SSH connection}{group=Authentication}
|
|
arg {number=7}{call=--remote-interface}{display=Remote interface}{type=string}
|
|
{tooltip=The remote network interface used for capture}{group=Capture}
|
|
arg {number=8}{call=--remote-capture-command}{display=Remote capture command}{type=string}
|
|
{tooltip=The remote command used to capture}{group=Capture}
|
|
arg {number=9}{call=--remote-sudo}{display=Use sudo on the remote machine}{type=boolean}
|
|
{tooltip=Prepend the capture command with sudo on the remote machine}{group=Capture}
|
|
arg {number=10}{call=--remote-noprom}{display=No promiscuous mode}{type=boolflag}
|
|
{tooltip=Don't use promiscuous mode on the remote machine}{group=Capture}
|
|
arg {number=11}{call=--remote-filter}{display=Remote capture filter}{type=string}
|
|
{tooltip=The remote capture filter}{default=not ((host myhost) and port 22)}{group=Capture}
|
|
arg {number=12}{call=--remote-count}{display=Packets to capture}{type=unsigned}{default=0}
|
|
{tooltip=The number of remote packets to capture. (Default: inf)}{group=Capture}
|
|
arg {number=13}{call=--debug}{display=Run in debug mode}{type=boolflag}{default=false}
|
|
{tooltip=Print debug messages}{required=false}{group=Debug}
|
|
arg {number=14}{call=--debug-file}{display=Use a file for debug}{type=string}
|
|
{tooltip=Set a file where the debug messages are written}{required=false}{group=Debug}
|
|
|
|
To capture:
|
|
|
|
sshdump --extcap-interface=sshdump --fifo=/tmp/ssh.pcap --capture --remote-host 192.168.1.10
|
|
--remote-username user --remote-filter "not port 22"
|
|
|
|
To use different capture binaries:
|
|
|
|
sshdump --extcap-interface=sshdump --fifo=/tmp/ssh.pcap --capture --remote-host 192.168.1.10
|
|
--remote-capture-command='dumpcap -i eth0 -P -w -'
|
|
|
|
sshdump --extcap-interface=sshdump --fifo=/tmp/ssh.pcap --capture --remote-host 192.168.1.10
|
|
--remote-capture-command='sudo tcpdump -i eth0 -U -w -'
|
|
|
|
NOTE: To stop capturing CTRL+C/kill/terminate application.
|
|
|
|
The sshdump binary can be renamed to support multiple instances. For instance if we want sshdump
|
|
to show up twice in wireshark (for instance to handle multiple profiles), we can copy sshdump to
|
|
sshdump-host1 and sshdump-host2. Each binary will show up an interface name same as the executable
|
|
name. Those executables not being "sshdump" will show up as "custom version" in the interface description.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
wireshark(1), tshark(1), dumpcap(1), extcap(4), tcpdump(1)
|
|
|
|
=head1 NOTES
|
|
|
|
B<Sshdump> is part of the B<Wireshark> distribution. The latest version
|
|
of B<Wireshark> can be found at L<https://www.wireshark.org>.
|
|
|
|
HTML versions of the Wireshark project man pages are available at:
|
|
L<https://www.wireshark.org/docs/man-pages>.
|
|
|
|
=head1 AUTHORS
|
|
|
|
Original Author
|
|
-------- ------
|
|
Dario Lombardo <lomato[AT]gmail.com>
|