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Session Report

Summary:
Test run at: 2024-05-29 11:14:04 GMT
Client Prefix (v4): 203.159.71.x/24
Client AS (v4): 63528 (BKNIX-AS-AP)
IPv4 Probes: 69
Client Prefix (v6): 2001:deb:xx::/40
Client AS (v6): 63528 (BKNIX-AS-AP)
IPv6 Probes: 64
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length nonenone
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 (203.159.71.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
203.159.71.x/24/3163528natblock
203.159.71.x/24/3063528natblock
203.159.71.x/24/2963528natblock
203.159.71.x/24/2863528natblock
203.159.71.x/24/2763528natblock
203.159.71.x/24/2663528natblock
203.159.71.x/24/2563528natblock
203.159.71.x/24/2463528natblock
203.159.70.x/24/2363528natblock
203.159.69.x/24/22UNROUTEDnatblock
203.159.67.x/24/2163528natblock
203.159.79.x/24/20137856natblock
203.159.87.x/24/1954103natblock
203.159.103.x/24/1817887natblock
203.159.7.x/24/174767natblock
203.159.199.x/24/164621natblock
203.158.71.x/24/15UNROUTEDnatblock
203.157.71.x/24/149649natblock
203.155.71.x/24/137693natblock
203.151.71.x/24/124618natblock
203.143.71.x/24/1110105natblock
203.191.71.x/24/10UNROUTEDnatblock
203.223.71.x/24/9UNROUTEDnatblock
203.31.71.x/24/89449natblock

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 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
IPv6 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.

  

  
IPv6 probes:
Spoofed source addressDestinationReceived
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:deb:xx::/40/12063528natblock
2001:deb:xx::/40/11263528natblock
2001:deb:xx::/40/10463528natblock
2001:deb:xx::/40/9663528natblock
2001:deb:xx::/40/8863528natblock
2001:deb:xx::/40/8063528natblock
2001:deb:xx::/40/7263528natblock
2001:deb:xx::/40/6463528natblock
2001:deb:xx::/40/5663528natblock
2001:deb:xx::/40/4863528natblock
2001:deb:xx::/40/40UNROUTEDnatblock
2001:deb:80xx::/40/32UNROUTEDnatblock
2001:d6b:xx::/40/24UNROUTEDnatblock
2001:8deb:xx::/40/161221natblock

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.
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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