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Session Report

Summary:
Test run at: 2021-04-09 14:41:50 GMT
Client Prefix (v4): 203.101.183.x/24
Client AS (v4): 9541 (CYBERNET-AP)
IPv4 Probes: 66
Client Prefix (v6): 2400:adcc:1xx::/40
Client AS (v6): 9541 (CYBERNET-AP)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
Largest spoofable neighbor prefix length none/64
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.

Warnings:

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
203.101.183.x/24/319541rewritten
203.101.183.x/24/309541rewritten
203.101.183.x/24/299541rewritten
203.101.183.x/24/289541rewritten
203.101.183.x/24/279541rewritten
203.101.183.x/24/269541rewritten
203.101.183.x/24/259541rewritten
203.101.183.x/24/249541rewritten
203.101.182.x/24/239541rewritten
203.101.181.x/24/22UNROUTEDrewritten
203.101.179.x/24/219541rewritten
203.101.191.x/24/209541rewritten
203.101.167.x/24/199541rewritten
203.101.151.x/24/184637rewritten
203.101.247.x/24/1724436rewritten
203.101.55.x/24/169498rewritten
203.100.183.x/24/1517839rewritten
203.103.183.x/24/14703rewritten
203.97.183.x/24/134768natblock
203.109.183.x/24/129500rewritten
203.117.183.x/24/114657rewritten
203.69.183.x/24/103462rewritten
203.37.183.x/24/91221rewritten
203.229.183.x/24/84766rewritten

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.
rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

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::1592001:630:212:225:225:90ff: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
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
2400:adcc:1xx::/40/1209541yes
2400:adcc:1xx::/40/1129541yes
2400:adcc:1xx::/40/1049541yes
2400:adcc:1xx::/40/969541yes
2400:adcc:1xx::/40/889541yes
2400:adcc:1xx::/40/809541yes
2400:adcc:1xx::/40/729541yes
2400:adcc:1xx::/40/649541yes
2400:adcc:1xx::/40/569541no
2400:adcc:1xx::/40/489541no
2400:adcc:1xx::/40/409541no
2400:adcc:81xx::/40/32UNROUTEDno
2400:ad4c:1xx::/40/24UNROUTEDno
2400:2dcc:1xx::/40/1617676no

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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