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Session Report

Summary:
Test run at: 2023-09-16 06:34:52 GMT
Client Prefix (v4): 117.28.251.x/24
Client AS (v4): 4809 (CHINATELECOM-CORE-WAN-CN2)
IPv4 Probes: 69
Client Prefix (v6): 2001:da8:e8xx::/40
Client AS (v6): 4538 (ERX-CERNET-BKB)
IPv6 Probes: 60
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 /25/48
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.
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 (117.28.251.x/24) can spoof 127 neighboring addresses (within your /25 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
117.28.251.x/24/314809yes
117.28.251.x/24/304809yes
117.28.251.x/24/294809yes
117.28.251.x/24/284809yes
117.28.251.x/24/274809yes
117.28.251.x/24/264809yes
117.28.251.x/24/254809yes
117.28.251.x/24/244809natblock
117.28.250.x/24/234809natblock
117.28.249.x/24/224809natblock
117.28.255.x/24/214809natblock
117.28.243.x/24/204809natblock
117.28.235.x/24/19140330natblock
117.28.219.x/24/184134natblock
117.28.187.x/24/174134natblock
117.28.123.x/24/164134natblock
117.29.251.x/24/154134natblock
117.30.251.x/24/144134natblock
117.24.251.x/24/134134natblock
117.20.251.x/24/129981natblock
117.12.251.x/24/114837natblock
117.60.251.x/24/104134natblock
117.92.251.x/24/94134natblock
117.156.251.x/24/89808natblock

Meaning of status in Received column:

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 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::1592001:610:510:115:192:42:115:98no
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
2001:da8:e8xx::/40/1204538yes
2001:da8:e8xx::/40/1124538yes
2001:da8:e8xx::/40/1044538yes
2001:da8:e8xx::/40/964538yes
2001:da8:e8xx::/40/884538yes
2001:da8:e8xx::/40/804538yes
2001:da8:e8xx::/40/724538yes
2001:da8:e8xx::/40/644538yes
2001:da8:e8xx::/40/564538yes
2001:da8:e8xx::/40/484538yes
2001:da8:e8xx::/40/4023910no
2001:da8:68xx::/40/3223910no
2001:d28:e8xx::/40/249621no
2001:8da8:e8xx::/40/161221no

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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