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Center for Applied Internet Data Analysis
Session Report

Test run at: 2017-08-29 10:46:34 GMT
Client Prefix (v4): 77.48.148.x/24
Client AS (v4): 6830 (LGI-UPC)
IPv4 Probes: 132

Egress spoofing summary
Address type IPv4
Private unknown
Routable unknown
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 (77.48.148.x/24) can spoof 0 neighboring addresses


    Spoofed IP (anon)Prefix
    Length
    ASN of
    Spoofed IP
    Received
    77.48.148.x/24/316830natblock
    77.48.148.x/24/306830natblock
    77.48.148.x/24/296830natblock
    77.48.148.x/24/286830natblock
    77.48.148.x/24/276830natblock
    77.48.148.x/24/266830natblock
    77.48.148.x/24/256830natblock
    77.48.148.x/24/246830natblock
    77.48.149.x/24/236830natblock
    77.48.150.x/24/226830natblock
    77.48.144.x/24/216830natblock
    77.48.156.x/24/206830natblock
    77.48.132.x/24/196830natblock
    77.48.180.x/24/186830natblock
    77.48.212.x/24/176830natblock
    77.48.20.x/24/166830natblock
    77.49.148.x/24/151241natblock
    77.50.148.x/24/1434602natblock
    77.52.148.x/24/1321497natblock
    77.56.148.x/24/126830natblock
    77.32.148.x/24/11UNROUTEDnatblock
    77.16.148.x/24/102119natblock
    77.112.148.x/24/98374natblock
    77.176.148.x/24/86805natblock

    Meaning of status in Received column:

    natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

    IPv4 Egress Filtering Depth:

    The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 2 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: