Logo

Session Report

Summary:
Test run at: 2021-02-16 17:10:11 GMT
Client Prefix (v4): 89.64.47.x/24
Client AS (v4): 6830 (LibertyGlobal)
IPv4 Probes: 66
Client Prefix (v6): 2a02:a31d:85xx::/40
Client AS (v6): 6830 (LibertyGlobal)
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/104
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 (89.64.47.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
89.64.47.x/24/316830natblock
89.64.47.x/24/306830natblock
89.64.47.x/24/296830natblock
89.64.47.x/24/286830natblock
89.64.47.x/24/276830natblock
89.64.47.x/24/266830natblock
89.64.47.x/24/256830natblock
89.64.47.x/24/246830natblock
89.64.46.x/24/236830natblock
89.64.45.x/24/226830natblock
89.64.43.x/24/216830natblock
89.64.39.x/24/206830natblock
89.64.63.x/24/196830natblock
89.64.15.x/24/186830natblock
89.64.111.x/24/176830natblock
89.64.175.x/24/166830natblock
89.65.47.x/24/156830natblock
89.66.47.x/24/146830natblock
89.68.47.x/24/136830natblock
89.72.47.x/24/126830natblock
89.80.47.x/24/115410natblock
89.96.47.x/24/1012874natblock
89.0.47.x/24/98422natblock
89.192.47.x/24/8UNROUTEDnatblock

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::1592001:770:18:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:18:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:18:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:18:7:225:90ff: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
2a02:a31d:85xx::/40/1206830yes
2a02:a31d:85xx::/40/1126830yes
2a02:a31d:85xx::/40/1046830yes
2a02:a31d:85xx::/40/966830no
2a02:a31d:85xx::/40/886830rewritten
2a02:a31d:85xx::/40/806830no
2a02:a31d:85xx::/40/726830rewritten
2a02:a31d:85xx::/40/646830no
2a02:a31d:85xx::/40/566830rewritten
2a02:a31d:85xx::/40/486830no
2a02:a31d:85xx::/40/406830no
2a02:a31d:5xx::/40/326830no
2a02:a39d:85xx::/40/24UNROUTEDno
2a02:231d:85xx::/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)
rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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.
Last Modified