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Session Report

Summary:
Test run at: 2021-03-26 18:13:47 GMT
Client Prefix (v4): 191.5.164.x/24
Client AS (v4): 263541
IPv4 Probes: 66
Client Prefix (v6): 2804:1398:xx::/40
Client AS (v6): 263541
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedreceived
Routable blockedreceived
Largest spoofable neighbor prefix length none/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.
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 (191.5.164.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.5.164.x/24/31263541natblock
191.5.164.x/24/30263541natblock
191.5.164.x/24/29263541natblock
191.5.164.x/24/28263541natblock
191.5.164.x/24/27263541natblock
191.5.164.x/24/26263541natblock
191.5.164.x/24/25263541natblock
191.5.164.x/24/24263541natblock
191.5.165.x/24/23263541natblock
191.5.166.x/24/22263541natblock
191.5.160.x/24/21263538natblock
191.5.172.x/24/20263539natblock
191.5.180.x/24/1953238natblock
191.5.132.x/24/18263536natblock
191.5.228.x/24/1752908natblock
191.5.36.x/24/16263531natblock
191.4.164.x/24/1519611natblock
191.7.164.x/24/14263322natblock
191.1.164.x/24/137738natblock
191.13.164.x/24/1227699natblock
191.21.164.x/24/1126599natblock
191.37.164.x/24/10263363natblock
191.69.164.x/24/926611natblock
191.133.164.x/24/826615natblock

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::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::1592001:630:212:225:225:90ff: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:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fyes
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
2804:1398:xx::/40/120263541yes
2804:1398:xx::/40/112263541yes
2804:1398:xx::/40/104263541yes
2804:1398:xx::/40/96263541yes
2804:1398:xx::/40/88263541yes
2804:1398:xx::/40/80263541yes
2804:1398:xx::/40/72263541yes
2804:1398:xx::/40/64263541yes
2804:1398:xx::/40/56263541yes
2804:1398:xx::/40/48263541yes
2804:1398:xx::/40/40263541yes
2804:1398:80xx::/40/32263541yes
2804:1318:xx::/40/24263515yes
2804:9398:xx::/40/16UNROUTEDyes

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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