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Session Report

Summary:
Test run at: 2025-01-15 08:20:44 GMT
Client Prefix (v4): 171.6.198.x/24
Client AS (v4): 45758 (TTBP-AS-AP)
IPv4 Probes: 162
Client Prefix (v6): 2403:6200:88xx::/40
Client AS (v6): 45758 (TTBP-AS-AP)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenrewritten
Routable rewrittenrewritten
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 (171.6.198.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
171.6.198.x/24/3145758rewritten
171.6.198.x/24/3045758rewritten
171.6.198.x/24/2945758rewritten
171.6.198.x/24/2845758rewritten
171.6.198.x/24/2745758rewritten
171.6.198.x/24/2645758rewritten
171.6.198.x/24/2545758rewritten
171.6.198.x/24/2445758rewritten
171.6.199.x/24/2345758rewritten
171.6.196.x/24/2245758rewritten
171.6.194.x/24/2145758rewritten
171.6.206.x/24/2045758rewritten
171.6.214.x/24/1945758rewritten
171.6.230.x/24/1845758rewritten
171.6.134.x/24/1745758rewritten
171.6.70.x/24/1645758rewritten
171.7.198.x/24/1545758rewritten
171.4.198.x/24/1445758rewritten
171.2.198.x/24/13UNROUTEDrewritten
171.14.198.x/24/124134rewritten
171.22.198.x/24/1112684rewritten
171.38.198.x/24/104837rewritten
171.70.198.x/24/9109rewritten
171.134.198.x/24/8UNROUTEDrewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

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
2403:6200:88xx::/40/12045758rewritten
2403:6200:88xx::/40/11245758rewritten
2403:6200:88xx::/40/10445758rewritten
2403:6200:88xx::/40/9645758rewritten
2403:6200:88xx::/40/8845758rewritten
2403:6200:88xx::/40/8045758rewritten
2403:6200:88xx::/40/7245758rewritten
2403:6200:88xx::/40/6445758rewritten
2403:6200:88xx::/40/5645758rewritten
2403:6200:88xx::/40/4845758rewritten
2403:6200:88xx::/40/4045758rewritten
2403:6200:8xx::/40/3245758rewritten
2403:6280:88xx::/40/24UNROUTEDrewritten
2403:e200:88xx::/40/1645543rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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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