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Session Report

Summary:
Test run at: 2021-05-04 22:30:48 GMT
Client Prefix (v4): 165.16.208.x/24
Client AS (v4): 37721 (Virtual-Technologies-Solutions-SA)
IPv4 Probes: 66
Client Prefix (v6): 2c0f:ee00:xx::/40
Client AS (v6): 37721 (Virtual-Technologies-Solutions-SA)
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 /24/64

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 (165.16.208.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
165.16.208.x/24/3137721natblock
165.16.208.x/24/3037721natblock
165.16.208.x/24/2937721natblock
165.16.208.x/24/2837721natblock
165.16.208.x/24/2737721natblock
165.16.208.x/24/2637721natblock
165.16.208.x/24/2537721yes
165.16.208.x/24/2437721yes
165.16.209.x/24/2337721natblock
165.16.210.x/24/2237721natblock
165.16.212.x/24/2137721natblock
165.16.216.x/24/2037721natblock
165.16.192.x/24/19327792natblock
165.16.240.x/24/18327808natblock
165.16.144.x/24/1737314natblock
165.16.80.x/24/1637284natblock
165.17.208.x/24/15UNROUTEDnatblock
165.18.208.x/24/14UNROUTEDnatblock
165.20.208.x/24/13UNROUTEDnatblock
165.24.208.x/24/12394917natblock
165.0.208.x/24/1137053natblock
165.48.208.x/24/10UNROUTEDnatblock
165.80.208.x/24/9UNROUTEDnatblock
165.144.208.x/24/837457natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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
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
2c0f:ee00:xx::/40/12037721yes
2c0f:ee00:xx::/40/11237721yes
2c0f:ee00:xx::/40/10437721yes
2c0f:ee00:xx::/40/9637721yes
2c0f:ee00:xx::/40/8837721yes
2c0f:ee00:xx::/40/8037721yes
2c0f:ee00:xx::/40/7237721yes
2c0f:ee00:xx::/40/6437721yes
2c0f:ee00:xx::/40/5637721no
2c0f:ee00:xx::/40/4837721no
2c0f:ee00:xx::/40/40UNROUTEDno
2c0f:ee00:80xx::/40/32UNROUTEDno
2c0f:ee80:xx::/40/24UNROUTEDno
2c0f:6e00:xx::/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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