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Session Report

Summary:
Test run at: 2021-12-31 11:14:40 GMT
Client Prefix (v4): 195.191.180.x/24
Client AS (v4): 50661 (TELKABSPZOO-AS)
IPv4 Probes: 63
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length none
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 (195.191.180.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.191.180.x/24/3150661rewritten
195.191.180.x/24/3050661rewritten
195.191.180.x/24/2950661rewritten
195.191.180.x/24/2850661rewritten
195.191.180.x/24/2750661rewritten
195.191.180.x/24/2650661rewritten
195.191.180.x/24/2550661rewritten
195.191.180.x/24/2450661rewritten
195.191.181.x/24/2350661rewritten
195.191.182.x/24/2250688rewritten
195.191.176.x/24/21207291rewritten
195.191.188.x/24/206830rewritten
195.191.164.x/24/1931463rewritten
195.191.148.x/24/18201200rewritten
195.191.244.x/24/17174rewritten
195.191.52.x/24/1650365rewritten
195.190.180.x/24/1512620rewritten
195.189.180.x/24/1449608rewritten
195.187.180.x/24/138308rewritten
195.183.180.x/24/122686rewritten
195.175.180.x/24/119121rewritten
195.159.180.x/24/102116rewritten
195.255.180.x/24/9719rewritten
195.63.180.x/24/812312rewritten

Meaning of status in Received column:

rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
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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