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Session Report

Summary:
Test run at: 2021-08-23 11:39:34 GMT
Client Prefix (v4): 177.128.184.x/24
Client AS (v4): 28587
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length /21
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 (177.128.184.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.128.184.x/24/3128587yes
177.128.184.x/24/3028587yes
177.128.184.x/24/2928587yes
177.128.184.x/24/2828587yes
177.128.184.x/24/2728587yes
177.128.184.x/24/2628587yes
177.128.184.x/24/2528587yes
177.128.184.x/24/2428587yes
177.128.185.x/24/2328587yes
177.128.186.x/24/2228587yes
177.128.188.x/24/2128587yes
177.128.176.x/24/20262377rewritten
177.128.168.x/24/19262376rewritten
177.128.152.x/24/1852744rewritten
177.128.248.x/24/17262777rewritten
177.128.56.x/24/1652638rewritten
177.129.184.x/24/15262566rewritten
177.130.184.x/24/1428202rewritten
177.132.184.x/24/1318881rewritten
177.136.184.x/24/12263596rewritten
177.144.184.x/24/1127699rewritten
177.160.184.x/24/1026599rewritten
177.192.184.x/24/928573rewritten
177.0.184.x/24/88167rewritten

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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