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Session Report

Summary:
Test run at: 2021-10-15 18:02:51 GMT
Client Prefix (v4): 195.181.174.x/24
Client AS (v4): 60068 (CDN77)
IPv4 Probes: 66
Client Prefix (v6): 2a02:6ea0:cfxx::/40
Client AS (v6): 60068 (CDN77)
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

Meaning of result status in column:

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.181.174.x/24/3160068natblock
195.181.174.x/24/3060068natblock
195.181.174.x/24/2960068natblock
195.181.174.x/24/2860068natblock
195.181.174.x/24/2760068natblock
195.181.174.x/24/2660068natblock
195.181.174.x/24/2560068natblock
195.181.174.x/24/2460068natblock
195.181.175.x/24/2360068natblock
195.181.172.x/24/2260068natblock
195.181.170.x/24/2160068natblock
195.181.166.x/24/2060068natblock
195.181.190.x/24/1944513natblock
195.181.142.x/24/18203424natblock
195.181.238.x/24/177514natblock
195.181.46.x/24/1658224natblock
195.180.174.x/24/156659natblock
195.183.174.x/24/142686natblock
195.177.174.x/24/1312371natblock
195.189.174.x/24/128823natblock
195.165.174.x/24/111759natblock
195.149.174.x/24/103257natblock
195.245.174.x/24/99186natblock
195.53.174.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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a02:6ea0:cfxx::/40/12060068natblock
2a02:6ea0:cfxx::/40/11260068natblock
2a02:6ea0:cfxx::/40/10460068natblock
2a02:6ea0:cfxx::/40/9660068natblock
2a02:6ea0:cfxx::/40/8860068natblock
2a02:6ea0:cfxx::/40/8060068natblock
2a02:6ea0:cfxx::/40/7260068natblock
2a02:6ea0:cfxx::/40/6460068natblock
2a02:6ea0:cfxx::/40/5660068natblock
2a02:6ea0:cfxx::/40/4860068natblock
2a02:6ea0:cfxx::/40/4060068natblock
2a02:6ea0:4fxx::/40/32UNROUTEDnatblock
2a02:6e20:cfxx::/40/24UNROUTEDnatblock
2a02:eea0:cfxx::/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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