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SC_TBITBLIND(1)        DragonFly General Commands Manual       SC_TBITBLIND(1)


NAME

     sc_tbitblind - scamper driver to test systems for resilience to blind TCP
     attacks.


SYNOPSIS

     sc_tbitblind [-r] [-a addressfile] [-A application] [-c completed-file]
                  [-l limit-per-file] [-o output-file] [-O options]
                  [-p scamper-port] [-t log-file] [-T ttl] [-w wait-between]


DESCRIPTION

     The sc_tbitblind utility provides the ability to connect to a running
     scamper(1) instance and use that instance to test systems for resilience
     to blind TCP attacks, with the output written to a file in warts format.
     The utility tests a given system for regular TCP behavior, and then tests
     the system for response to reset, SYN, and data packets that could have
     come from a blind attacker because the sequence number is not the next
     sequence number value expected by the receiver (the reset and SYN cases)
     or the acknowledgment value covers data ahead or behind the receiver's
     point in their sequence number space (the data cases).  The utility also
     tests the system's response to a connection that advertises support for
     window scaling, TCP timestamps, and Selective Acknowledgments (SACK).

     The options are as follows:

     -?      prints a list of command line options and a synopsis of each.

     -a addressfile
             specifies the name of the input file which constists of a
             sequence of systems to test, one system per line.

     -A application
             specifies the type of application to simulate while testing the
             system.  Options are HTTP and BGP.

     -c completed-file
             specifies the name of a file to record IP addresses that have
             been tested.

     -l limit-per-file
             specifies the number of tbit objects to record per warts file,
             before opening a new file and placing new objects.

     -o output-file
             specifies the name of the file to be written.  The output file
             will use the warts format.

     -O options
             allows the behavior of sc_tbitblind to be further tailored.  The
             current choices for this option are:
               -  noshuffle: do not shuffle the order of the input list or the
                  order of the tests.

     -p scamper-port
             specifies the port on the local host where scamper(1) is
             accepting control socket connections.

     -r      causes the random number generator used to shuffle tests be
             seeded.

     -t log-file
             specifies the name of a file to log progress output from
             sc_tbitblind generated at run time.

     -T ttl  specifies the IP-TTL to use with the blind TCP tests.

     -w wait-between
             specifies the length of time to wait between any two TCP tests to
             one system.


EXAMPLES

     Use of this driver requires a scamper instance listening on a port for
     commands, which has been configured to use the IPFW firewall as follows:

           scamper -P 31337 -F ipfw

     To test a set of web servers specified in a file named webservers.txt and
     formatted as follows:

     1,example.com 1263 192.0.2.1 http://www.example.com/
     1,example.com 1263 2001:DB8::1 http://www.example.com/
     1,example.com 1263 2001:DB8::2 https://www.example.com/

     the following command will test all servers for resilience to blind TCP
     attacks and record raw data into webservers_00.warts,
     webservers_01.warts, etc:

           sc_tbitblind -a webservers.txt -p 31337 -o webservers

     The webservers.txt file is required to be formatted as above.  The format
     is: numeric ID to pass to tbit, a label for the webserver, the size of
     the object to be fetched, the IP address to contact, and the URL to use.

     To test a set of BGP routers specified in bgprouters.txt and formatted as
     follows:

     192.0.2.2 65000
     192.0.2.2 65001

     the following command will test all BGP routers for resilience to blind
     TCP attacks, without shuffling the test order, waiting 180 seconds
     between tests, and record raw data into bgprouters_00.warts,
     bgprouters_01.warts, etc:

           sc_tbitblind -a bgprouters.txt -p 31337 -o bgprouters -A bgp -O
           noshuffle -w 180

     The bgprouters.txt file is required to be formatted as above.  The format
     of that file is: IP address to establish a BGP session with, and the ASN
     to use.


SEE ALSO

     M. Luckie, R. Beverly, T. Wu, M. Allman, and k. claffy, Resilience of
     Deployed TCP to Blind Attacks, Proc. ACM/SIGCOMM Internet Measurement
     Conference 2015.  scamper(1), sc_wartsdump(1), sc_warts2json(1), warts(5)


AUTHORS

     sc_tbitblind was written by Matthew Luckie <mjl@luckie.org.nz>.  Tiange
     Wu contributed an initial implementation of the blind in-window TBIT test
     to scamper, and Robert Beverly contributed support for testing BGP
     routers.

DragonFly 6.5-DEVELOPMENT     September 19, 2015     DragonFly 6.5-DEVELOPMENT

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