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Session Report

Summary:
Test run at: 2024-04-03 03:29:41 GMT
Client Prefix (v4): 160.238.185.x/24
Client AS (v4): 265728
IPv4 Probes: 66
Client Prefix (v6): 2803:3c0:15xx::/40
Client AS (v6): 265728
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenreceived
Routable receivedreceived
Largest spoofable neighbor prefix length none/48
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 (160.238.185.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
160.238.185.x/24/31265728sendto
160.238.185.x/24/30265728sendto
160.238.185.x/24/29265728sendto
160.238.185.x/24/28265728sendto
160.238.185.x/24/27265728rewritten
160.238.185.x/24/26265728sendto
160.238.185.x/24/25265728sendto
160.238.185.x/24/24265728rewritten
160.238.184.x/24/23265728sendto
160.238.187.x/24/22265728sendto
160.238.189.x/24/21266642natblock
160.238.177.x/24/20265898sendto
160.238.169.x/24/19265725natblock
160.238.153.x/24/18262881sendto
160.238.249.x/24/17266564sendto
160.238.57.x/24/1636974natblock
160.239.185.x/24/159366rewritten
160.236.185.x/24/14UNROUTEDsendto
160.234.185.x/24/13UNROUTEDsendto
160.230.185.x/24/121983sendto
160.254.185.x/24/11UNROUTEDrewritten
160.206.185.x/24/10UNROUTEDrewritten
160.174.185.x/24/96713sendto
160.110.185.x/24/8UNROUTEDrewritten

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.
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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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::242yes
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::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:610:510:115:192:42:115:98yes
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:45a6yes
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::1592001:638:902:2000:ba27:ebff:fe86:2c51yes
2001:4978:1fb:6400::d22001:638:902:2000:ba27:ebff:fe86:2c51no
2001:49aa:111:aa00::112001:638:902:2000:ba27:ebff:fe86:2c51no
fd11:1111:1111::11112001:638:902:2000:ba27:ebff:fe86:2c51no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4yes
2001:48d0:101:501::1592607:8400:2880:4::80df:9d0dyes
2001:4978:1fb:6400::d22607:8400:2880:4::80df:9d0dyes
2001:49aa:111:aa00::112607:8400:2880:4::80df:9d0dyes
fd11:1111:1111::11112607:8400:2880:4::80df:9d0dno
2001:48d0:101:501::1592607:f278:2:13:da3a:ddff:fe30:ce14yes
2001:4978:1fb:6400::d22607:f278:2:13:da3a:ddff:fe30:ce14yes
2001:49aa:111:aa00::112607:f278:2:13:da3a:ddff:fe30:ce14yes
fd11:1111:1111::11112607:f278:2:13:da3a:ddff:fe30:ce14yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2803:3c0:15xx::/40/120265728sendto
2803:3c0:15xx::/40/112265728yes
2803:3c0:15xx::/40/104265728sendto
2803:3c0:15xx::/40/96265728yes
2803:3c0:15xx::/40/88265728sendto
2803:3c0:15xx::/40/80265728no
2803:3c0:15xx::/40/72265728yes
2803:3c0:15xx::/40/64265728yes
2803:3c0:15xx::/40/56265728sendto
2803:3c0:15xx::/40/48265728yes
2803:3c0:15xx::/40/40265728sendto
2803:3c0:95xx::/40/32265728sendto
2803:340:15xx::/40/24264685sendto
2803:83c0:15xx::/40/16UNROUTEDsendto

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)
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
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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