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Session Report

Summary:
Test run at: 2019-11-03 19:05:59 GMT
Client Prefix (v4): 199.91.196.x/24
Client AS (v4): 27500 (ICANN-MEETINGS)
IPv4 Probes: 75
Client Prefix (v6): 2620:f:80xx::/40
Client AS (v6): 27500 (ICANN-MEETINGS)
IPv6 Probes: 68
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
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.

Warnings:

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 (199.91.196.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.91.196.x/24/3127500natblock
199.91.196.x/24/3027500natblock
199.91.196.x/24/2927500natblock
199.91.196.x/24/2827500natblock
199.91.196.x/24/2727500natblock
199.91.196.x/24/2627500natblock
199.91.196.x/24/2527500natblock
199.91.196.x/24/2427500natblock
199.91.197.x/24/2327500natblock
199.91.198.x/24/2227500natblock
199.91.192.x/24/2127500natblock
199.91.204.x/24/2040727natblock
199.91.212.x/24/1936493natblock
199.91.228.x/24/18397422natblock
199.91.132.x/24/17UNROUTEDnatblock
199.91.68.x/24/1610480natblock
199.90.196.x/24/156559natblock
199.89.196.x/24/1411215natblock
199.95.196.x/24/133356natblock
199.83.196.x/24/1246650natblock
199.75.196.x/24/113356natblock
199.123.196.x/24/10UNROUTEDnatblock
199.27.196.x/24/953586natblock
199.219.196.x/24/8UNROUTEDnatblock

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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2620:f:80xx::/40/12027500no
2620:f:80xx::/40/11227500no
2620:f:80xx::/40/10427500no
2620:f:80xx::/40/9627500no
2620:f:80xx::/40/8827500no
2620:f:80xx::/40/8027500no
2620:f:80xx::/40/7227500no
2620:f:80xx::/40/6427500no
2620:f:80xx::/40/5627500no
2620:f:80xx::/40/4827500no
2620:f:80xx::/40/40UNROUTEDno
2620:f:xx::/40/323754no
2620:8f:80xx::/40/24396012no
2620:800f:80xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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