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Session Report

Summary:
Test run at: 2020-02-12 18:09:21 GMT
Client Prefix (v4): 163.253.42.x/24
Client AS (v4): 22742 (CT-EDU-NET)
IPv4 Probes: 75
Client Prefix (v6): 2001:468:26xx::/40
Client AS (v6): 22742 (CT-EDU-NET)
IPv6 Probes: 72
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 (163.253.42.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
163.253.42.x/24/3122742no
163.253.42.x/24/3022742no
163.253.42.x/24/2922742no
163.253.42.x/24/2822742no
163.253.42.x/24/2722742no
163.253.42.x/24/2622742no
163.253.42.x/24/2522742no
163.253.42.x/24/2422742no
163.253.43.x/24/23UNROUTEDno
163.253.40.x/24/2211537no
163.253.46.x/24/2114618no
163.253.34.x/24/2011537no
163.253.58.x/24/19UNROUTEDno
163.253.10.x/24/18UNROUTEDno
163.253.106.x/24/17UNROUTEDno
163.253.170.x/24/16UNROUTEDno
163.252.42.x/24/15UNROUTEDno
163.255.42.x/24/144766no
163.249.42.x/24/13668no
163.245.42.x/24/1217no
163.237.42.x/24/1119255no
163.221.42.x/24/102500no
163.189.42.x/24/955542no
163.125.42.x/24/817623no

Meaning of status in Received column:

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

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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:468:26xx::/40/12022742no
2001:468:26xx::/40/11222742no
2001:468:26xx::/40/10422742no
2001:468:26xx::/40/9622742no
2001:468:26xx::/40/8822742no
2001:468:26xx::/40/8022742no
2001:468:26xx::/40/7222742no
2001:468:26xx::/40/6422742no
2001:468:26xx::/40/5622742no
2001:468:26xx::/40/4822742no
2001:468:26xx::/40/4011537no
2001:468:a6xx::/40/3211537no
2001:4e8:26xx::/40/246327no
2001:8468:26xx::/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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