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Session Report

Summary:
Test run at: 2022-05-17 09:11:44 GMT
Client Prefix (v4): 116.7.245.x/24
Client AS (v4): 4134 (CHINANET-BACKBONE)
IPv4 Probes: 60
Client Prefix (v6): 2001:da8:2dxx::/40
Client AS (v6): 138369 (CNGI-SZH-IX-AS-AP)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone
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 (116.7.245.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
116.7.245.x/24/314134natblock
116.7.245.x/24/304134natblock
116.7.245.x/24/294134natblock
116.7.245.x/24/284134natblock
116.7.245.x/24/274134natblock
116.7.245.x/24/264134natblock
116.7.245.x/24/254134natblock
116.7.245.x/24/244134natblock
116.7.244.x/24/234134natblock
116.7.247.x/24/224134natblock
116.7.241.x/24/214134natblock
116.7.253.x/24/204134natblock
116.7.229.x/24/194134natblock
116.7.213.x/24/184134natblock
116.7.181.x/24/174134natblock
116.7.117.x/24/164134natblock
116.6.245.x/24/154809natblock
116.5.245.x/24/144134natblock
116.3.245.x/24/134837natblock
116.15.245.x/24/129506natblock
116.23.245.x/24/114134natblock
116.39.245.x/24/1017858natblock
116.71.245.x/24/917557natblock
116.135.245.x/24/8139007natblock

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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:da8:2dxx::/40/120138369no
2001:da8:2dxx::/40/112138369no
2001:da8:2dxx::/40/104138369no
2001:da8:2dxx::/40/96138369no
2001:da8:2dxx::/40/88138369no
2001:da8:2dxx::/40/80138369no
2001:da8:2dxx::/40/72138369no
2001:da8:2dxx::/40/64138369no
2001:da8:2dxx::/40/56138369no
2001:da8:2dxx::/40/48138369no
2001:da8:2dxx::/40/4023910no
2001:da8:adxx::/40/3223910no
2001:d28:2dxx::/40/249621no
2001:8da8:2dxx::/40/161221no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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