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 rules 1 to 100, as follows:

           scamper -P 31337 -F ipfw:1-100

     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.