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Session Report

Summary:
Test run at: 2023-03-29 16:39:19 GMT
Client Prefix (v4): 77.37.29.x/24
Client AS (v4): 204471
IPv4 Probes: 60
Client Prefix (v6): 2a12:d8c0:10xx::/40
Client AS (v6): 204471
IPv6 Probes: 52
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 /28/48
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 (77.37.29.x/24) can spoof 15 neighboring addresses (within your /28 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
77.37.29.x/24/31204471yes
77.37.29.x/24/30204471natblock
77.37.29.x/24/29204471yes
77.37.29.x/24/28204471yes
77.37.29.x/24/27204471natblock
77.37.29.x/24/26204471natblock
77.37.29.x/24/25204471natblock
77.37.29.x/24/24204471natblock
77.37.28.x/24/2331400natblock
77.37.31.x/24/2231400natblock
77.37.25.x/24/2131400natblock
77.37.21.x/24/2031400natblock
77.37.13.x/24/1931400natblock
77.37.61.x/24/1831400natblock
77.37.93.x/24/1758212natblock
77.37.157.x/24/1642610natblock
77.36.29.x/24/159009natblock
77.39.29.x/24/1412683natblock
77.33.29.x/24/1344869natblock
77.45.29.x/24/1235191natblock
77.53.29.x/24/1145011natblock
77.5.29.x/24/106805natblock
77.101.29.x/24/95089natblock
77.165.29.x/24/81136natblock

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 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::5458:517ano
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ano
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ano
fd11:1111:1111::11112001:40b0:7500:280::5458:517ano
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::1592001:770:1c:7:225:90ff:fe0c:acb4no
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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a12:d8c0:10xx::/40/120204471yes
2a12:d8c0:10xx::/40/112204471yes
2a12:d8c0:10xx::/40/104204471yes
2a12:d8c0:10xx::/40/96204471yes
2a12:d8c0:10xx::/40/88204471yes
2a12:d8c0:10xx::/40/80204471yes
2a12:d8c0:10xx::/40/72204471yes
2a12:d8c0:10xx::/40/64204471yes
2a12:d8c0:10xx::/40/56204471yes
2a12:d8c0:10xx::/40/48204471yes
2a12:d8c0:10xx::/40/40204471no
2a12:d8c0:90xx::/40/32204471no
2a12:d840:10xx::/40/24UNROUTEDno
2a12:58c0:10xx::/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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