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Session Report

Summary:
Test run at: 2024-03-01 09:51:08 GMT
Client Prefix (v4): 82.199.134.x/24
Client AS (v4): 201011 (NETZBETRIEB-GMBH)
IPv4 Probes: 66
Client Prefix (v6): 2a01:4a0:xx::/40
Client AS (v6): 201011 (NETZBETRIEB-GMBH)
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 nonenone
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 (82.199.134.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
82.199.134.x/24/31201011natblock
82.199.134.x/24/30201011natblock
82.199.134.x/24/29201011natblock
82.199.134.x/24/28201011natblock
82.199.134.x/24/27201011natblock
82.199.134.x/24/26201011natblock
82.199.134.x/24/25201011natblock
82.199.134.x/24/24201011natblock
82.199.135.x/24/23201011natblock
82.199.132.x/24/22201011natblock
82.199.130.x/24/21201011natblock
82.199.142.x/24/20201011natblock
82.199.150.x/24/19201011natblock
82.199.166.x/24/183238natblock
82.199.198.x/24/1744395natblock
82.199.6.x/24/1630737natblock
82.198.134.x/24/1515502natblock
82.197.134.x/24/1413237natblock
82.195.134.x/24/1329650natblock
82.207.134.x/24/128881natblock
82.215.134.x/24/1134606natblock
82.231.134.x/24/1012322natblock
82.135.134.x/24/98764natblock
82.71.134.x/24/813037natblock

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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a01:4a0:xx::/40/120201011natblock
2a01:4a0:xx::/40/112201011natblock
2a01:4a0:xx::/40/104201011natblock
2a01:4a0:xx::/40/96201011natblock
2a01:4a0:xx::/40/88201011natblock
2a01:4a0:xx::/40/80201011natblock
2a01:4a0:xx::/40/72201011natblock
2a01:4a0:xx::/40/64201011natblock
2a01:4a0:xx::/40/56201011natblock
2a01:4a0:xx::/40/48201011natblock
2a01:4a0:xx::/40/40201011natblock
2a01:4a0:80xx::/40/32201011natblock
2a01:420:xx::/40/2441695natblock
2a01:84a0:xx::/40/16UNROUTEDnatblock

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.
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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