Logo

Session Report

Summary:
Test run at: 2020-07-09 09:19:41 GMT
Client Prefix (v4): 219.87.142.x/24
Client AS (v4): 9924 (TFN-TW)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
Largest spoofable neighbor prefix length none

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


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
219.87.142.x/24/319924natblock
219.87.142.x/24/309924natblock
219.87.142.x/24/299924natblock
219.87.142.x/24/289924sendto
219.87.142.x/24/279924sendto
219.87.142.x/24/269924sendto
219.87.142.x/24/259924sendto
219.87.142.x/24/249924sendto
219.87.143.x/24/239924sendto
219.87.140.x/24/229924sendto
219.87.138.x/24/219924sendto
219.87.134.x/24/209924sendto
219.87.158.x/24/199924sendto
219.87.174.x/24/189924sendto
219.87.206.x/24/179924sendto
219.87.14.x/24/169924sendto
219.86.142.x/24/159924sendto
219.85.142.x/24/1418182sendto
219.83.142.x/24/13UNROUTEDsendto
219.95.142.x/24/124788sendto
219.71.142.x/24/119416sendto
219.119.142.x/24/102497sendto
219.23.142.x/24/917676sendto
219.215.142.x/24/817676sendto

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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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.
Last Modified