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Session Report

Summary:
Test run at: 2023-09-06 15:52:59 GMT
Client Prefix (v4): 41.242.157.x/24
Client AS (v4): 328594 (SUDATCHAD-AS)
IPv4 Probes: 63
Client Prefix (v6): 2c0f:eb98:xx::/40
Client AS (v6): 328594 (SUDATCHAD-AS)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownblocked
Routable unknownblocked
Largest spoofable neighbor prefix length none/40
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 (41.242.157.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
41.242.157.x/24/31328594natblock
41.242.157.x/24/30328594natblock
41.242.157.x/24/29328594natblock
41.242.157.x/24/28328594natblock
41.242.157.x/24/27328594natblock
41.242.157.x/24/26328594natblock
41.242.157.x/24/25328594natblock
41.242.157.x/24/24328594natblock
41.242.156.x/24/23328594natblock
41.242.159.x/24/22328594natblock
41.242.153.x/24/21328594natblock
41.242.149.x/24/2048063natblock
41.242.141.x/24/1922690natblock
41.242.189.x/24/1836974natblock
41.242.221.x/24/1737105natblock
41.242.29.x/24/1637566natblock
41.243.157.x/24/15UNROUTEDnatblock
41.240.157.x/24/1436998natblock
41.246.157.x/24/1337457natblock
41.250.157.x/24/1236903natblock
41.226.157.x/24/1137705natblock
41.210.157.x/24/1020294natblock
41.178.157.x/24/924863natblock
41.114.157.x/24/816637natblock

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::1592001:40b0:7500:280::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
2c0f:eb98:xx::/40/120328594no
2c0f:eb98:xx::/40/112328594yes
2c0f:eb98:xx::/40/104328594no
2c0f:eb98:xx::/40/96328594no
2c0f:eb98:xx::/40/88328594yes
2c0f:eb98:xx::/40/80328594no
2c0f:eb98:xx::/40/72328594yes
2c0f:eb98:xx::/40/64328594yes
2c0f:eb98:xx::/40/56328594yes
2c0f:eb98:xx::/40/48328594yes
2c0f:eb98:xx::/40/40328594yes
2c0f:eb98:80xx::/40/32328594no
2c0f:eb18:xx::/40/24UNROUTEDno
2c0f:6b98: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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