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Session Report

Summary:
Test run at: 2021-01-14 19:19:14 GMT
Client Prefix (v4): 165.123.230.x/24
Client AS (v4): 55 (UPENN)
IPv4 Probes: 69
Client Prefix (v6): 2607:f470:xx::/40
Client AS (v6): 55 (UPENN)
IPv6 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length /16/32
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.
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 (165.123.230.x/24) can spoof 65535 neighboring addresses (within your /16 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
165.123.230.x/24/3155yes
165.123.230.x/24/3055yes
165.123.230.x/24/2955yes
165.123.230.x/24/2855yes
165.123.230.x/24/2755yes
165.123.230.x/24/2655yes
165.123.230.x/24/2555yes
165.123.230.x/24/2455yes
165.123.231.x/24/2355yes
165.123.228.x/24/2255yes
165.123.226.x/24/2155yes
165.123.238.x/24/2055yes
165.123.246.x/24/1955yes
165.123.198.x/24/1855yes
165.123.166.x/24/1755yes
165.123.102.x/24/1655yes
165.122.230.x/24/153375natblock
165.121.230.x/24/147029natblock
165.127.230.x/24/1336081natblock
165.115.230.x/24/12UNROUTEDnatblock
165.107.230.x/24/112642natblock
165.91.230.x/24/103794natblock
165.59.230.x/24/937154natblock
165.251.230.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

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 2 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::1592001:630:212:225:225:90ff: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::1592001:770:18:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:18:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:18:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:18:7:225:90ff:fe0c:acb4no
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fno
fd11:1111:1111::11112001:df0:4:800:21c:c0ff:feb2:ad5fno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2607:f470:xx::/40/12055yes
2607:f470:xx::/40/11255yes
2607:f470:xx::/40/10455yes
2607:f470:xx::/40/9655yes
2607:f470:xx::/40/8855yes
2607:f470:xx::/40/8055yes
2607:f470:xx::/40/7255yes
2607:f470:xx::/40/6455yes
2607:f470:xx::/40/5655yes
2607:f470:xx::/40/4855yes
2607:f470:xx::/40/4055yes
2607:f470:80xx::/40/3255yes
2607:f4f0:xx::/40/2440581no
2607:7470:xx::/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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