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Center for Applied Internet Data Analysis
Session Report

Test run at: 2017-09-07 04:38:10 GMT
Client Prefix (v4): 212.111.9.x/24
Client AS (v4): 25424 (INEXT-CZ)
IPv4 Probes: 117

Egress spoofing summary
Address type IPv4
Private rewritten
Routable rewritten
Largest spoofable neighbor prefix none

Warnings:

  • Your host is behind a Network Address Translation (NAT) router or firewall which rewrites the source addresses of the test traffic. To test your provider's network further, you must remove the NAT/firewall/router and connect directly.

    IPv4 AS Route:

    This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run.
    
    

    IPv4 Adjacent Netblock Testing:

    Your host (212.111.9.x/24) can spoof 0 neighboring addresses


    Spoofed IP (anon)Prefix
    Length
    ASN of
    Spoofed IP
    Received
    212.111.9.x/24/3125424rewritten
    212.111.9.x/24/3025424rewritten
    212.111.9.x/24/2925424rewritten
    212.111.9.x/24/2825424rewritten
    212.111.9.x/24/2725424rewritten
    212.111.9.x/24/2625424rewritten
    212.111.9.x/24/2525424rewritten
    212.111.9.x/24/2425424rewritten
    212.111.8.x/24/2325424rewritten
    212.111.11.x/24/2225424rewritten
    212.111.13.x/24/2125424rewritten
    212.111.1.x/24/2025424rewritten
    212.111.25.x/24/1925424rewritten
    212.111.41.x/24/1863949rewritten
    212.111.73.x/24/179110rewritten
    212.111.137.x/24/169142rewritten
    212.110.9.x/24/1515589rewritten
    212.109.9.x/24/1442387rewritten
    212.107.9.x/24/13UNROUTEDrewritten
    212.103.9.x/24/1212670rewritten
    212.127.9.x/24/115400rewritten
    212.79.9.x/24/1020783rewritten
    212.47.9.x/24/95588rewritten
    212.239.9.x/24/83313rewritten

    Meaning of status in Received column:

    rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

    IPv4 Egress Filtering Depth:

    The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
    Summary:
    The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.
    Feedback:
    We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
      Last Modified: