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Session Report

Summary:
Test run at: 2020-10-06 20:29:21 GMT
Client Prefix (v4): 91.199.50.x/24
Client AS (v4): 47869 (NETROUTING-AS)
IPv4 Probes: 75
Client Prefix (v6): 2a00:dd0:bbxx::/40
Client AS (v6): 47869 (NETROUTING-AS)
IPv6 Probes: 68
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
Largest spoofable neighbor prefix length nonenone
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 (91.199.50.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
91.199.50.x/24/3147869natblock
91.199.50.x/24/3047869natblock
91.199.50.x/24/2947869natblock
91.199.50.x/24/2847869natblock
91.199.50.x/24/2747869natblock
91.199.50.x/24/2647869natblock
91.199.50.x/24/2547869natblock
91.199.50.x/24/2447869natblock
91.199.51.x/24/2347544natblock
91.199.48.x/24/22UNROUTEDnatblock
91.199.54.x/24/21205216natblock
91.199.58.x/24/2030870natblock
91.199.34.x/24/1944121natblock
91.199.18.x/24/18203684natblock
91.199.114.x/24/173175natblock
91.199.178.x/24/1644595natblock
91.198.50.x/24/1543497natblock
91.197.50.x/24/1443418natblock
91.195.50.x/24/1341585natblock
91.207.50.x/24/1239537natblock
91.215.50.x/24/11202169natblock
91.231.50.x/24/10UNROUTEDnatblock
91.135.50.x/24/961275natblock
91.71.50.x/24/815557natblock

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.
IPv6 probes:
Spoofed source addressDestinationReceived
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a00:dd0:bbxx::/40/12047869natblock
2a00:dd0:bbxx::/40/11247869natblock
2a00:dd0:bbxx::/40/10447869natblock
2a00:dd0:bbxx::/40/9647869natblock
2a00:dd0:bbxx::/40/8847869natblock
2a00:dd0:bbxx::/40/8047869natblock
2a00:dd0:bbxx::/40/7247869natblock
2a00:dd0:bbxx::/40/6447869natblock
2a00:dd0:bbxx::/40/5647869natblock
2a00:dd0:bbxx::/40/4847869natblock
2a00:dd0:bbxx::/40/4047869natblock
2a00:dd0:3bxx::/40/3247869natblock
2a00:d50:bbxx::/40/24UNROUTEDnatblock
2a00:8dd0:bbxx::/40/16UNROUTEDnatblock

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.
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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