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Session Report

Summary:
Test run at: 2022-05-03 20:15:56 GMT
Client Prefix (v4): 191.190.81.x/24
Client AS (v4): 28573
IPv4 Probes: 60
Client Prefix (v6): 2804:14c:dexx::/40
Client AS (v6): 28573
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
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 (191.190.81.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.190.81.x/24/3128573rewritten
191.190.81.x/24/3028573rewritten
191.190.81.x/24/2928573rewritten
191.190.81.x/24/2828573rewritten
191.190.81.x/24/2728573rewritten
191.190.81.x/24/2628573rewritten
191.190.81.x/24/2528573rewritten
191.190.81.x/24/2428573rewritten
191.190.80.x/24/2328573rewritten
191.190.83.x/24/2228573rewritten
191.190.85.x/24/2128573rewritten
191.190.89.x/24/2028573rewritten
191.190.65.x/24/1928573rewritten
191.190.113.x/24/1828573rewritten
191.190.17.x/24/1728573rewritten
191.190.209.x/24/1628573rewritten
191.191.81.x/24/1528573rewritten
191.188.81.x/24/1428573rewritten
191.186.81.x/24/1328573rewritten
191.182.81.x/24/1228573rewritten
191.174.81.x/24/1126615rewritten
191.158.81.x/24/1026611rewritten
191.254.81.x/24/927699rewritten
191.62.81.x/24/84230rewritten

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 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
2804:14c:dexx::/40/12028573yes
2804:14c:dexx::/40/11228573yes
2804:14c:dexx::/40/10428573yes
2804:14c:dexx::/40/9628573yes
2804:14c:dexx::/40/8828573yes
2804:14c:dexx::/40/8028573yes
2804:14c:dexx::/40/7228573yes
2804:14c:dexx::/40/6428573yes
2804:14c:dexx::/40/5628573no
2804:14c:dexx::/40/4828573no
2804:14c:dexx::/40/4028573no
2804:14c:5exx::/40/32UNROUTEDno
2804:1cc:dexx::/40/2428130no
2804:814c:dexx::/40/16272445no

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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