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Session Report

Summary:
Test run at: 2023-04-03 14:21:30 GMT
Client Prefix (v4): 202.81.252.x/24
Client AS (v4): 4658 (M2012LIMITED-AS)
IPv4 Probes: 60
Client Prefix (v6): 2401:300:xx::/40
Client AS (v6): 4658 (M2012LIMITED-AS)
IPv6 Probes: 52
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 /12/16
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 (202.81.252.x/24) can spoof 1048575 neighboring addresses (within your /12 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
202.81.252.x/24/314658yes
202.81.252.x/24/304658yes
202.81.252.x/24/294658yes
202.81.252.x/24/284658yes
202.81.252.x/24/274658yes
202.81.252.x/24/264658yes
202.81.252.x/24/254658yes
202.81.252.x/24/244658yes
202.81.253.x/24/234658yes
202.81.254.x/24/224658yes
202.81.248.x/24/214658yes
202.81.244.x/24/204658yes
202.81.236.x/24/194658yes
202.81.220.x/24/1818065no
202.81.188.x/24/174811no
202.81.124.x/24/1658521no
202.80.252.x/24/1545458no
202.83.252.x/24/14UNROUTEDno
202.85.252.x/24/13UNROUTEDno
202.89.252.x/24/124658yes
202.65.252.x/24/11UNROUTEDno
202.113.252.x/24/104538no
202.17.252.x/24/9UNROUTEDno
202.209.252.x/24/82907no

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)

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::1592001:40b0:7500:280::5458:517ayes
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ayes
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ayes
fd11:1111:1111::11112001:40b0:7500:280::5458:517ayes
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:acb4yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2401:300:xx::/40/1204658yes
2401:300:xx::/40/1124658yes
2401:300:xx::/40/1044658yes
2401:300:xx::/40/964658yes
2401:300:xx::/40/884658yes
2401:300:xx::/40/804658yes
2401:300:xx::/40/724658yes
2401:300:xx::/40/644658yes
2401:300:xx::/40/564658yes
2401:300:xx::/40/484658yes
2401:300:xx::/40/404658yes
2401:300:80xx::/40/324658yes
2401:380:xx::/40/2417907yes
2401:8300: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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