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Session Report

Summary:
Test run at: 2020-08-17 18:43:31 GMT
Client Prefix (v4): 81.171.5.x/24
Client AS (v4): 60781 (LEASEWEB-NL-AMS-01)
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 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.

IPv4 Adjacent Netblock Testing:

Your host (81.171.5.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
81.171.5.x/24/3160781natblock
81.171.5.x/24/3060781natblock
81.171.5.x/24/2960781natblock
81.171.5.x/24/2860781natblock
81.171.5.x/24/2760781natblock
81.171.5.x/24/2660781natblock
81.171.5.x/24/2560781natblock
81.171.5.x/24/2460781natblock
81.171.4.x/24/2360781natblock
81.171.7.x/24/2260781natblock
81.171.1.x/24/2160781natblock
81.171.13.x/24/2060781natblock
81.171.21.x/24/1960781natblock
81.171.37.x/24/1834343natblock
81.171.69.x/24/1734343natblock
81.171.133.x/24/168426natblock
81.170.5.x/24/159105natblock
81.169.5.x/24/145432natblock
81.175.5.x/24/132116natblock
81.163.5.x/24/1258303natblock
81.187.5.x/24/1120712natblock
81.139.5.x/24/102856natblock
81.235.5.x/24/93301natblock
81.43.5.x/24/83352natblock

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.

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.
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