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Session Report

Summary:
Test run at: 2020-11-05 15:42:32 GMT
Client Prefix (v4): 195.74.132.x/24
Client AS (v4): 8586 (OBSL-AS)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /19
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.
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. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (195.74.132.x/24) can spoof 8191 neighboring addresses (within your /19 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.74.132.x/24/318586yes
195.74.132.x/24/308586yes
195.74.132.x/24/298586yes
195.74.132.x/24/288586yes
195.74.132.x/24/278586natblock
195.74.132.x/24/268586yes
195.74.132.x/24/258586yes
195.74.132.x/24/248586natblock
195.74.133.x/24/238586natblock
195.74.134.x/24/228586yes
195.74.128.x/24/218586natblock
195.74.140.x/24/208586natblock
195.74.148.x/24/198586yes
195.74.164.x/24/188519natblock
195.74.196.x/24/175432natblock
195.74.4.x/24/16719natblock
195.75.132.x/24/152686natblock
195.72.132.x/24/1413008natblock
195.78.132.x/24/133246natblock
195.66.132.x/24/1236057natblock
195.90.132.x/24/116863natblock
195.106.132.x/24/10UNROUTEDnatblock
195.10.132.x/24/916086natblock
195.202.132.x/24/88339natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound 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.
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