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Session Report

Summary:
Test run at: 2021-10-12 20:46:35 GMT
Client Prefix (v4): 87.240.197.x/24
Client AS (v4): 6661 (EPT-LU)
IPv4 Probes: 66
Client Prefix (v6): 2001:7e8:f2xx::/40
Client AS (v6): 6661 (EPT-LU)
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/56
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 (87.240.197.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
87.240.197.x/24/316661rewritten
87.240.197.x/24/306661rewritten
87.240.197.x/24/296661rewritten
87.240.197.x/24/286661rewritten
87.240.197.x/24/276661rewritten
87.240.197.x/24/266661rewritten
87.240.197.x/24/256661rewritten
87.240.197.x/24/246661rewritten
87.240.196.x/24/236661rewritten
87.240.199.x/24/226661rewritten
87.240.193.x/24/216661rewritten
87.240.205.x/24/206661rewritten
87.240.213.x/24/196661rewritten
87.240.229.x/24/186661rewritten
87.240.133.x/24/1747541rewritten
87.240.69.x/24/1635184rewritten
87.241.197.x/24/1512772rewritten
87.242.197.x/24/1412708rewritten
87.244.197.x/24/1331117rewritten
87.248.197.x/24/1222822rewritten
87.224.197.x/24/1112389rewritten
87.208.197.x/24/1050266rewritten
87.176.197.x/24/93320rewritten
87.112.197.x/24/86871rewritten

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 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
2001:7e8:f2xx::/40/1206661yes
2001:7e8:f2xx::/40/1126661yes
2001:7e8:f2xx::/40/1046661yes
2001:7e8:f2xx::/40/966661yes
2001:7e8:f2xx::/40/886661yes
2001:7e8:f2xx::/40/806661yes
2001:7e8:f2xx::/40/726661yes
2001:7e8:f2xx::/40/646661yes
2001:7e8:f2xx::/40/566661yes
2001:7e8:f2xx::/40/486661no
2001:7e8:f2xx::/40/406661no
2001:7e8:72xx::/40/326661no
2001:768:f2xx::/40/248356no
2001:87e8:f2xx::/40/161221no

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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