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Session Report

Summary:
Test run at: 2019-08-12 11:00:36 GMT
Client Prefix (v4): 212.81.57.x/24
Client AS (v4): 203145
IPv4 Probes: 96
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /9
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.

IPv4 Adjacent Netblock Testing:

Your host (212.81.57.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
212.81.57.x/24/31203145yes
212.81.57.x/24/30203145yes
212.81.57.x/24/29203145yes
212.81.57.x/24/28203145yes
212.81.57.x/24/27203145yes
212.81.57.x/24/26203145yes
212.81.57.x/24/25203145yes
212.81.57.x/24/24203145yes
212.81.56.x/24/23203145yes
212.81.59.x/24/22203145yes
212.81.61.x/24/21UNROUTEDno
212.81.49.x/24/2050304no
212.81.41.x/24/199009yes
212.81.25.x/24/185578yes
212.81.121.x/24/178928yes
212.81.185.x/24/163262no
212.80.57.x/24/158788yes
212.83.57.x/24/1447447yes
212.85.57.x/24/1312521no
212.89.57.x/24/122116yes
212.65.57.x/24/1147377yes
212.113.57.x/24/106849no
212.17.57.x/24/934245yes
212.209.57.x/24/8702no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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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