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Session Report

Summary:
Test run at: 2021-12-01 11:00:52 GMT
Client Prefix (v4): 177.23.32.x/24
Client AS (v4): 262888
IPv4 Probes: 66
Client Prefix (v6): 2804:56c:d2xx::/40
Client AS (v6): 28210
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedreceived
Routable blockedreceived
Largest spoofable neighbor prefix length none/24
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 (177.23.32.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.23.32.x/24/31262888natblock
177.23.32.x/24/30262888natblock
177.23.32.x/24/29262888natblock
177.23.32.x/24/28262888natblock
177.23.32.x/24/27262888natblock
177.23.32.x/24/26262888natblock
177.23.32.x/24/25262888natblock
177.23.32.x/24/24262888natblock
177.23.33.x/24/23262888natblock
177.23.34.x/24/22262888natblock
177.23.36.x/24/21262888natblock
177.23.40.x/24/20263038natblock
177.23.48.x/24/19270868natblock
177.23.0.x/24/18262886natblock
177.23.96.x/24/17263347natblock
177.23.160.x/24/1652960natblock
177.22.32.x/24/1552981natblock
177.21.32.x/24/14262761natblock
177.19.32.x/24/1318881natblock
177.31.32.x/24/1226615natblock
177.7.32.x/24/118167natblock
177.55.32.x/24/10262482natblock
177.87.32.x/24/953184natblock
177.151.32.x/24/826615natblock

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::242yes
2001:4978:1fb:6400::d22001:48d0:101:501::242yes
2001:49aa:111:aa00::112001:48d0:101:501::242yes
fd11:1111:1111::11112001:48d0:101:501::242yes
2001:48d0:101:501::1592001:48d0:101:501::247yes
2001:4978:1fb:6400::d22001:48d0:101:501::247yes
2001:49aa:111:aa00::112001:48d0:101:501::247yes
fd11:1111:1111::11112001:48d0:101:501::247yes
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::1592001:770:1c:7:225:90ff:fe0c:acb4yes
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
2804:56c:d2xx::/40/12028210yes
2804:56c:d2xx::/40/11228210yes
2804:56c:d2xx::/40/10428210yes
2804:56c:d2xx::/40/9628210yes
2804:56c:d2xx::/40/8828210yes
2804:56c:d2xx::/40/8028210yes
2804:56c:d2xx::/40/7228210yes
2804:56c:d2xx::/40/6428210yes
2804:56c:d2xx::/40/5628210yes
2804:56c:d2xx::/40/4828210yes
2804:56c:d2xx::/40/4028210yes
2804:56c:52xx::/40/3228210yes
2804:5ec:d2xx::/40/2428143yes
2804:856c:d2xx::/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
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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