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Session Report

Summary:
Test run at: 2021-03-30 19:27:24 GMT
Client Prefix (v4): 195.66.248.x/24
Client AS (v4): 5459 (LINX-AS)
IPv4 Probes: 66
Client Prefix (v6): 2a01:40:54xx::/40
Client AS (v6): 5459 (LINX-AS)
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/72
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 (195.66.248.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.66.248.x/24/315459natblock
195.66.248.x/24/305459natblock
195.66.248.x/24/295459natblock
195.66.248.x/24/285459natblock
195.66.248.x/24/275459natblock
195.66.248.x/24/265459natblock
195.66.248.x/24/255459natblock
195.66.248.x/24/245459natblock
195.66.249.x/24/235459natblock
195.66.250.x/24/225459natblock
195.66.252.x/24/21UNROUTEDnatblock
195.66.240.x/24/205459natblock
195.66.232.x/24/195459natblock
195.66.216.x/24/1834661natblock
195.66.184.x/24/178585natblock
195.66.120.x/24/1660781natblock
195.67.248.x/24/153301natblock
195.64.248.x/24/1445043natblock
195.70.248.x/24/138437natblock
195.74.248.x/24/121241natblock
195.82.248.x/24/11UNROUTEDnatblock
195.98.248.x/24/102200natblock
195.2.248.x/24/98312natblock
195.194.248.x/24/8786natblock

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::1592001:630:212:225:225:90ff: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
2a01:40:54xx::/40/1205459yes
2a01:40:54xx::/40/1125459yes
2a01:40:54xx::/40/1045459yes
2a01:40:54xx::/40/965459yes
2a01:40:54xx::/40/885459yes
2a01:40:54xx::/40/805459yes
2a01:40:54xx::/40/725459yes
2a01:40:54xx::/40/645459no
2a01:40:54xx::/40/565459no
2a01:40:54xx::/40/485459no
2a01:40:54xx::/40/405459no
2a01:40:d4xx::/40/325459no
2a01:c0:54xx::/40/2431708no
2a01:8040:54xx::/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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