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Center for Applied Internet Data Analysis
Session Report

Test run at: 2017-09-04 15:05:00 GMT
Client Prefix (v4): 81.0.223.x/24
Client AS (v4): 15685 (CASABLANCA-AS)
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 (81.0.223.x/24) can spoof 0 neighboring addresses


    Spoofed IP (anon)Prefix
    Length
    ASN of
    Spoofed IP
    Received
    81.0.223.x/24/3115685natblock
    81.0.223.x/24/3015685natblock
    81.0.223.x/24/2915685natblock
    81.0.223.x/24/2815685natblock
    81.0.223.x/24/2715685natblock
    81.0.223.x/24/2615685natblock
    81.0.223.x/24/2515685natblock
    81.0.223.x/24/2415685natblock
    81.0.222.x/24/2315685natblock
    81.0.221.x/24/2215685natblock
    81.0.219.x/24/2115685natblock
    81.0.215.x/24/2015685natblock
    81.0.207.x/24/1915685natblock
    81.0.255.x/24/1815685natblock
    81.0.159.x/24/172116natblock
    81.0.95.x/24/1612301natblock
    81.1.223.x/24/1521127natblock
    81.2.223.x/24/1424806natblock
    81.4.223.x/24/1360747natblock
    81.8.223.x/24/1225176natblock
    81.16.223.x/24/11UNROUTEDnatblock
    81.32.223.x/24/103352natblock
    81.64.223.x/24/921502natblock
    81.128.223.x/24/82856natblock

    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 unable to spoof routable, non-adjacent source addresses through even the first IP hop.
    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: