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Session Report

Summary:
Test run at: 2021-12-23 08:35:18 GMT
Client Prefix (v4): 122.171.242.x/24
Client AS (v4): 24560 (AIRTELBROADBAND-AS-AP)
IPv4 Probes: 63
Client Prefix (v6): 2401:4900:1fxx::/40
Client AS (v6): 24560 (AIRTELBROADBAND-AS-AP)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable rewrittenreceived
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 (122.171.242.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
122.171.242.x/24/3124560rewritten
122.171.242.x/24/3024560rewritten
122.171.242.x/24/2924560rewritten
122.171.242.x/24/2824560rewritten
122.171.242.x/24/2724560rewritten
122.171.242.x/24/2624560rewritten
122.171.242.x/24/2524560rewritten
122.171.242.x/24/2424560rewritten
122.171.243.x/24/2324560rewritten
122.171.240.x/24/2224560rewritten
122.171.246.x/24/2124560rewritten
122.171.250.x/24/2024560rewritten
122.171.226.x/24/1924560rewritten
122.171.210.x/24/1824560rewritten
122.171.178.x/24/1724560rewritten
122.171.114.x/24/1624560rewritten
122.170.242.x/24/1524560rewritten
122.169.242.x/24/1424560rewritten
122.175.242.x/24/1324560rewritten
122.163.242.x/24/1224560rewritten
122.187.242.x/24/119498rewritten
122.139.242.x/24/104837rewritten
122.235.242.x/24/94134rewritten
122.43.242.x/24/817858rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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
2401:4900:1fxx::/40/12024560no
2401:4900:1fxx::/40/11224560no
2401:4900:1fxx::/40/10424560no
2401:4900:1fxx::/40/9624560no
2401:4900:1fxx::/40/8824560no
2401:4900:1fxx::/40/8024560no
2401:4900:1fxx::/40/7224560no
2401:4900:1fxx::/40/6424560no
2401:4900:1fxx::/40/5624560no
2401:4900:1fxx::/40/4824560no
2401:4900:1fxx::/40/40UNROUTEDno
2401:4900:9fxx::/40/32UNROUTEDno
2401:4980:1fxx::/40/24UNROUTEDno
2401:c900:1fxx::/40/1636351no

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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