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Session Report

Summary:
Test run at: 2023-02-21 18:32:35 GMT
Client Prefix (v4): 103.211.180.x/24
Client AS (v4): 33452 (RW)
IPv4 Probes: 60
Client Prefix (v6): 2601:646:83xx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable receivedblocked
Largest spoofable neighbor prefix length none/64
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 (103.211.180.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
103.211.180.x/24/3133452rewritten
103.211.180.x/24/3033452rewritten
103.211.180.x/24/2933452rewritten
103.211.180.x/24/2833452rewritten
103.211.180.x/24/2733452rewritten
103.211.180.x/24/2633452rewritten
103.211.180.x/24/2533452rewritten
103.211.180.x/24/2433452rewritten
103.211.181.x/24/2333452rewritten
103.211.182.x/24/2233452rewritten
103.211.176.x/24/2158659rewritten
103.211.188.x/24/20135255rewritten
103.211.164.x/24/19UNROUTEDrewritten
103.211.148.x/24/1817501rewritten
103.211.244.x/24/17135273rewritten
103.211.52.x/24/16133982rewritten
103.210.180.x/24/15UNROUTEDrewritten
103.209.180.x/24/149558rewritten
103.215.180.x/24/13UNROUTEDrewritten
103.219.180.x/24/1263742rewritten
103.195.180.x/24/11UNROUTEDrewritten
103.243.180.x/24/10133115rewritten
103.147.180.x/24/9140041rewritten
103.83.180.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 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:610:510:115:192:42:115:98no
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98no
2001:49aa:111:aa00::112001:610:510:115:192:42:115:98no
fd11:1111:1111::11112001:610:510:115:192:42:115:98no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2601:646:83xx::/40/1207922yes
2601:646:83xx::/40/1127922yes
2601:646:83xx::/40/1047922yes
2601:646:83xx::/40/967922yes
2601:646:83xx::/40/887922yes
2601:646:83xx::/40/807922yes
2601:646:83xx::/40/727922yes
2601:646:83xx::/40/647922yes
2601:646:83xx::/40/567922no
2601:646:83xx::/40/487922no
2601:646:83xx::/40/407922no
2601:646:3xx::/40/327922no
2601:6c6:83xx::/40/247922no
2601:8646:83xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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