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Session Report

Summary:
Test run at: 2022-08-03 17:22:52 GMT
Client Prefix (v4): 147.235.193.x/24
Client AS (v4): 6810 (BEZEK)
IPv4 Probes: 60
Client Prefix (v6): 2a06:c701:9exx::/40
Client AS (v6): 6810 (BEZEK)
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable receivedblocked
Largest spoofable neighbor prefix length /9/56
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.

Warnings:

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 (147.235.193.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
147.235.193.x/24/316810yes
147.235.193.x/24/306810yes
147.235.193.x/24/296810yes
147.235.193.x/24/286810yes
147.235.193.x/24/276810yes
147.235.193.x/24/266810yes
147.235.193.x/24/256810yes
147.235.193.x/24/246810yes
147.235.192.x/24/236810yes
147.235.195.x/24/226810yes
147.235.197.x/24/216810yes
147.235.201.x/24/206810yes
147.235.209.x/24/196810yes
147.235.225.x/24/186810yes
147.235.129.x/24/176810yes
147.235.65.x/24/166810yes
147.234.193.x/24/1530866yes
147.233.193.x/24/14378yes
147.239.193.x/24/131452yes
147.227.193.x/24/12668yes
147.251.193.x/24/112852yes
147.203.193.x/24/106130yes
147.171.193.x/24/91942yes
147.107.193.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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 able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a06:c701:9exx::/40/1206810yes
2a06:c701:9exx::/40/1126810yes
2a06:c701:9exx::/40/1046810yes
2a06:c701:9exx::/40/966810yes
2a06:c701:9exx::/40/886810yes
2a06:c701:9exx::/40/806810yes
2a06:c701:9exx::/40/726810yes
2a06:c701:9exx::/40/646810yes
2a06:c701:9exx::/40/566810yes
2a06:c701:9exx::/40/486810no
2a06:c701:9exx::/40/406810no
2a06:c701:1exx::/40/326810no
2a06:c781:9exx::/40/24198024no
2a06:4701:9exx::/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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