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Session Report

Summary:
Test run at: 2020-08-24 14:40:26 GMT
Client Prefix (v4): 31.216.55.x/24
Client AS (v4): 20860 (IOMART-AS)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /24
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 (31.216.55.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
31.216.55.x/24/3120860natblock
31.216.55.x/24/3020860natblock
31.216.55.x/24/2920860natblock
31.216.55.x/24/2820860yes
31.216.55.x/24/2720860natblock
31.216.55.x/24/2620860yes
31.216.55.x/24/2520860yes
31.216.55.x/24/2420860yes
31.216.54.x/24/2320860natblock
31.216.53.x/24/2220860natblock
31.216.51.x/24/2120860natblock
31.216.63.x/24/20UNROUTEDnatblock
31.216.39.x/24/19197308natblock
31.216.23.x/24/1849463natblock
31.216.119.x/24/1715805natblock
31.216.183.x/24/16196660natblock
31.217.55.x/24/155391natblock
31.218.55.x/24/145384natblock
31.220.55.x/24/1347583natblock
31.208.55.x/24/1229518natblock
31.200.55.x/24/1112978natblock
31.248.55.x/24/103320natblock
31.152.55.x/24/929247natblock
31.88.55.x/24/812576natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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).
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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