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Session Report

Summary:
Test run at: 2020-06-22 14:41:01 GMT
Client Prefix (v4): 207.74.77.x/24
Client AS (v4): 237 (MERIT-AS-14)
IPv4 Probes: 75
Client Prefix (v6): 2001:48a8:68xx::/40
Client AS (v6): 237 (MERIT-AS-14)
IPv6 Probes: 68
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 nonenone

Meaning of result status in column:

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 (207.74.77.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
207.74.77.x/24/31237natblock
207.74.77.x/24/30237natblock
207.74.77.x/24/29237natblock
207.74.77.x/24/28237natblock
207.74.77.x/24/27237natblock
207.74.77.x/24/26237natblock
207.74.77.x/24/25237natblock
207.74.77.x/24/24237natblock
207.74.76.x/24/23237natblock
207.74.79.x/24/22237natblock
207.74.73.x/24/21237natblock
207.74.69.x/24/20237natblock
207.74.93.x/24/19237natblock
207.74.109.x/24/18237natblock
207.74.13.x/24/17237natblock
207.74.205.x/24/16237natblock
207.75.77.x/24/15237natblock
207.72.77.x/24/14237natblock
207.78.77.x/24/13701natblock
207.66.77.x/24/1218779natblock
207.90.77.x/24/117321natblock
207.106.77.x/24/107029natblock
207.10.77.x/24/97029natblock
207.202.77.x/24/87270natblock

Meaning of status in Received column:

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 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::1592001:770:18:7:225:90ff: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
2001:48a8:68xx::/40/120237no
2001:48a8:68xx::/40/112237no
2001:48a8:68xx::/40/104237no
2001:48a8:68xx::/40/96237no
2001:48a8:68xx::/40/88237no
2001:48a8:68xx::/40/80237no
2001:48a8:68xx::/40/72237no
2001:48a8:68xx::/40/64237no
2001:48a8:68xx::/40/56237no
2001:48a8:68xx::/40/48237no
2001:48a8:68xx::/40/40237no
2001:48a8:e8xx::/40/32237no
2001:4828:68xx::/40/2416942no
2001:c8a8:68xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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