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Session Report

Summary:
Test run at: 2022-10-11 12:56:57 GMT
Client Prefix (v4): 185.40.98.x/24
Client AS (v4): 207176 (OPENFIBER)
IPv4 Probes: 60
Client Prefix (v6): 2a04:8400:xx::/40
Client AS (v6): 207176 (OPENFIBER)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedreceived
Routable receivedreceived
Largest spoofable neighbor prefix length /8/16
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 (185.40.98.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
185.40.98.x/24/31207176yes
185.40.98.x/24/30207176natblock
185.40.98.x/24/29207176yes
185.40.98.x/24/28207176yes
185.40.98.x/24/27207176yes
185.40.98.x/24/26207176yes
185.40.98.x/24/25207176yes
185.40.98.x/24/24207176yes
185.40.99.x/24/23207176yes
185.40.96.x/24/22207176yes
185.40.102.x/24/21UNROUTEDnatblock
185.40.106.x/24/2051095yes
185.40.114.x/24/19199981yes
185.40.66.x/24/186507yes
185.40.34.x/24/17199987yes
185.40.226.x/24/1642845yes
185.41.98.x/24/15208909yes
185.42.98.x/24/1447139yes
185.44.98.x/24/1362186yes
185.32.98.x/24/1260331yes
185.56.98.x/24/1139308yes
185.8.98.x/24/10205147yes
185.104.98.x/24/914537yes
185.168.98.x/24/8207028yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 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::242yes
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
2001:49aa:111:aa00::112001:48d0:101:501::242yes
fd11:1111:1111::11112001:48d0:101:501::242yes
2001:48d0:101:501::1592001:48d0:101:501::247yes
2001:4978:1fb:6400::d22001:48d0:101:501::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247yes
fd11:1111:1111::11112001:48d0:101:501::247yes
2001:48d0:101:501::1592001:610:510:115:192:42:115:98yes
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:45a6yes
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:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
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
2a04:8400:xx::/40/120207176yes
2a04:8400:xx::/40/112207176yes
2a04:8400:xx::/40/104207176yes
2a04:8400:xx::/40/96207176yes
2a04:8400:xx::/40/88207176yes
2a04:8400:xx::/40/80207176yes
2a04:8400:xx::/40/72207176yes
2a04:8400:xx::/40/64207176yes
2a04:8400:xx::/40/56207176yes
2a04:8400:xx::/40/48207176yes
2a04:8400:xx::/40/40207176yes
2a04:8400:80xx::/40/32207176yes
2a04:8480:xx::/40/24196714yes
2a04:400:xx::/40/1634254yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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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