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Session Report

Summary:
Test run at: 2021-10-28 21:10:32 GMT
Client Prefix (v4): 83.185.41.x/24
Client AS (v4): 1257 (SWIPNET)
IPv4 Probes: 66
Client Prefix (v6): 2a00:801:7xx::/40
Client AS (v6): 1257 (SWIPNET)
IPv6 Probes: 56
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 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.
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 (83.185.41.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
83.185.41.x/24/311257natblock
83.185.41.x/24/301257natblock
83.185.41.x/24/291257natblock
83.185.41.x/24/281257natblock
83.185.41.x/24/271257natblock
83.185.41.x/24/261257natblock
83.185.41.x/24/251257natblock
83.185.41.x/24/241257natblock
83.185.40.x/24/231257natblock
83.185.43.x/24/221257natblock
83.185.45.x/24/211257natblock
83.185.33.x/24/201257natblock
83.185.57.x/24/191257natblock
83.185.9.x/24/181257natblock
83.185.105.x/24/171257natblock
83.185.169.x/24/161257natblock
83.184.41.x/24/151257natblock
83.187.41.x/24/141257natblock
83.189.41.x/24/131257natblock
83.177.41.x/24/121257natblock
83.169.41.x/24/1120773natblock
83.153.41.x/24/1012322natblock
83.249.41.x/24/939651natblock
83.57.41.x/24/83352natblock

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::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
2a00:801:7xx::/40/1201257yes
2a00:801:7xx::/40/1121257yes
2a00:801:7xx::/40/1041257yes
2a00:801:7xx::/40/961257yes
2a00:801:7xx::/40/881257yes
2a00:801:7xx::/40/801257yes
2a00:801:7xx::/40/721257yes
2a00:801:7xx::/40/641257yes
2a00:801:7xx::/40/561257no
2a00:801:7xx::/40/481257no
2a00:801:7xx::/40/401257no
2a00:801:87xx::/40/321257no
2a00:881:7xx::/40/24UNROUTEDno
2a00:8801:7xx::/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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