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Session Report

Summary:
Test run at: 2023-03-15 18:21:13 GMT
Client Prefix (v4): 200.219.25.x/24
Client AS (v4): 270812
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /22
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 (200.219.25.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
200.219.25.x/24/31270812yes
200.219.25.x/24/30270812yes
200.219.25.x/24/29270812yes
200.219.25.x/24/28270812yes
200.219.25.x/24/27270812yes
200.219.25.x/24/26270812yes
200.219.25.x/24/25270812yes
200.219.25.x/24/24270812yes
200.219.24.x/24/23270812natblock
200.219.27.x/24/22270812yes
200.219.29.x/24/21270826natblock
200.219.17.x/24/20270810natblock
200.219.9.x/24/19270805natblock
200.219.57.x/24/18270817natblock
200.219.89.x/24/178167natblock
200.219.153.x/24/1611835natblock
200.218.25.x/24/1510362natblock
200.217.25.x/24/147738natblock
200.223.25.x/24/137738natblock
200.211.25.x/24/124230natblock
200.203.25.x/24/118167natblock
200.251.25.x/24/104230natblock
200.155.25.x/24/926592natblock
200.91.25.x/24/87004natblock

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 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.
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