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Session Report

Summary:
Test run at: 2023-03-07 20:58:25 GMT
Client Prefix (v4): 162.250.209.x/24
Client AS (v4): 33452 (RW)
IPv4 Probes: 57
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 (162.250.209.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
162.250.209.x/24/3133452rewritten
162.250.209.x/24/3033452rewritten
162.250.209.x/24/2933452rewritten
162.250.209.x/24/2833452rewritten
162.250.209.x/24/2733452rewritten
162.250.209.x/24/2633452rewritten
162.250.209.x/24/2533452rewritten
162.250.209.x/24/2433452rewritten
162.250.208.x/24/2333452rewritten
162.250.211.x/24/2233452rewritten
162.250.213.x/24/218008rewritten
162.250.217.x/24/20203872rewritten
162.250.193.x/24/1932678rewritten
162.250.241.x/24/1822925rewritten
162.250.145.x/24/1734971rewritten
162.250.81.x/24/1653271rewritten
162.251.209.x/24/157381rewritten
162.248.209.x/24/1446261rewritten
162.254.209.x/24/137819rewritten
162.242.209.x/24/1227357rewritten
162.234.209.x/24/117018rewritten
162.218.209.x/24/108100rewritten
162.186.209.x/24/921928rewritten
162.122.209.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::1592001:40b0:7500:280::5458:517ano
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ano
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ano
fd11:1111:1111::11112001:40b0:7500:280::5458:517ano
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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