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Session Report

Summary:
Test run at: 2022-01-20 03:04:53 GMT
Client Prefix (v4): 187.80.173.x/24
Client AS (v4): 26615
IPv4 Probes: 63
Client Prefix (v6): 2804:214:81xx::/40
Client AS (v6): 26615
IPv6 Probes: 52
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
Largest spoofable neighbor prefix length none/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.

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 (187.80.173.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
187.80.173.x/24/3126615rewritten
187.80.173.x/24/3026615rewritten
187.80.173.x/24/2926615natblock
187.80.173.x/24/2826615rewritten
187.80.173.x/24/2726615rewritten
187.80.173.x/24/2626615rewritten
187.80.173.x/24/2526615rewritten
187.80.173.x/24/2426615rewritten
187.80.172.x/24/2326615rewritten
187.80.175.x/24/2226615rewritten
187.80.169.x/24/2126615rewritten
187.80.165.x/24/2026615rewritten
187.80.189.x/24/1926615rewritten
187.80.141.x/24/1826615rewritten
187.80.237.x/24/1726615rewritten
187.80.45.x/24/1626615rewritten
187.81.173.x/24/1526615rewritten
187.82.173.x/24/1426615rewritten
187.84.173.x/24/1328285rewritten
187.88.173.x/24/1226599rewritten
187.64.173.x/24/1128573rewritten
187.112.173.x/24/1018881rewritten
187.16.173.x/24/928256rewritten
187.208.173.x/24/88151rewritten

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.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 1 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
2804:214:81xx::/40/12026615yes
2804:214:81xx::/40/11226615yes
2804:214:81xx::/40/10426615yes
2804:214:81xx::/40/9626615yes
2804:214:81xx::/40/8826615yes
2804:214:81xx::/40/8026615yes
2804:214:81xx::/40/7226615yes
2804:214:81xx::/40/6426615yes
2804:214:81xx::/40/5626615no
2804:214:81xx::/40/4826615no
2804:214:81xx::/40/4026615no
2804:214:1xx::/40/3226615no
2804:294:81xx::/40/2428604no
2804:8214:81xx::/40/16272497no

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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