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Session Report

Summary:
Test run at: 2023-11-18 18:30:37 GMT
Client Prefix (v4): 191.253.18.x/24
Client AS (v4): 262773
IPv4 Probes: 69
Client Prefix (v6): 2804:9f8:40xx::/40
Client AS (v6): 262773
IPv6 Probes: 60
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 (191.253.18.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.253.18.x/24/31262773rewritten
191.253.18.x/24/30262773rewritten
191.253.18.x/24/29262773rewritten
191.253.18.x/24/28262773rewritten
191.253.18.x/24/27262773rewritten
191.253.18.x/24/26262773rewritten
191.253.18.x/24/25262773rewritten
191.253.18.x/24/24262773rewritten
191.253.19.x/24/23262773rewritten
191.253.16.x/24/22262773rewritten
191.253.22.x/24/21263526rewritten
191.253.26.x/24/20263524rewritten
191.253.2.x/24/1953080rewritten
191.253.50.x/24/18272539rewritten
191.253.82.x/24/1752768rewritten
191.253.146.x/24/16UNROUTEDrewritten
191.252.18.x/24/1527715rewritten
191.255.18.x/24/1427699rewritten
191.249.18.x/24/1318881rewritten
191.245.18.x/24/1222085rewritten
191.237.18.x/24/118075rewritten
191.221.18.x/24/108167rewritten
191.189.18.x/24/928573rewritten
191.125.18.x/24/87418rewritten

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
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
2804:9f8:40xx::/40/120262773yes
2804:9f8:40xx::/40/112262773yes
2804:9f8:40xx::/40/104262773yes
2804:9f8:40xx::/40/96262773yes
2804:9f8:40xx::/40/88262773yes
2804:9f8:40xx::/40/80262773yes
2804:9f8:40xx::/40/72262773yes
2804:9f8:40xx::/40/64262773yes
2804:9f8:40xx::/40/56262773no
2804:9f8:40xx::/40/48262773no
2804:9f8:40xx::/40/40262773no
2804:9f8:c0xx::/40/32262773no
2804:978:40xx::/40/24263087no
2804:89f8:40xx::/40/16273638no

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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