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Session Report

Summary:
Test run at: 2017-07-28 12:00:55 GMT
Client Prefix (v4): 194.228.20.x/24
Client AS (v4): 5610 (O2-CZECH-REPUBLIC)
IPv4 Probes: 117
Client Prefix (v6): 2a00:1028:83xx::/40
Client AS (v6): 5610 (O2-CZECH-REPUBLIC)
IPv6 Probes: 77
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
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.

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 (194.228.20.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
194.228.20.x/24/315610natblock
194.228.20.x/24/305610natblock
194.228.20.x/24/295610natblock
194.228.20.x/24/285610natblock
194.228.20.x/24/275610natblock
194.228.20.x/24/265610natblock
194.228.20.x/24/255610natblock
194.228.20.x/24/245610natblock
194.228.21.x/24/235610natblock
194.228.22.x/24/225610natblock
194.228.16.x/24/215610natblock
194.228.28.x/24/205610natblock
194.228.4.x/24/195610natblock
194.228.52.x/24/185610natblock
194.228.84.x/24/175610natblock
194.228.148.x/24/165610natblock
194.229.20.x/24/15702natblock
194.230.20.x/24/146730natblock
194.224.20.x/24/133352natblock
194.236.20.x/24/123301natblock
194.244.20.x/24/113302natblock
194.196.20.x/24/102686natblock
194.164.20.x/24/98897natblock
194.100.20.x/24/816086natblock

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
2001:4978:1fb:6400::d22001:388:1:5001:21c:c0ff:fea2:4a3ano
2001:49aa:111:aa00::112001:388:1:5001:21c:c0ff:fea2:4a3ano
fd11:1111:1111::11112001:388:1:5001:21c:c0ff:fea2:4a3ano
2001:4978:1fb:6400::d22001:410:102:1::78no
2001:49aa:111:aa00::112001:410:102:1::78no
fd11:1111:1111::11112001:410:102:1::78no
2001:4978:1fb:6400::d22001:410:90ff::5no
2001:49aa:111:aa00::112001:410:90ff::5no
fd11:1111:1111::11112001:410:90ff::5no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:610:510:115:192:42:115:98no
2001:49aa:111:aa00::112001:610:510:115:192:42:115:98no
fd11:1111:1111::11112001:610:510:115:192:42:115:98no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:708:40:2001:21c:c0ff:fea2:4c5cno
2001:49aa:111:aa00::112001:708:40:2001:21c:c0ff:fea2:4c5cno
fd11:1111:1111::11112001:708:40:2001:21c:c0ff:fea2:4c5cno
2001:4978:1fb:6400::d22001:770:18:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:18:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:18:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a00:1028:83xx::/40/1205610no
2a00:1028:83xx::/40/1125610no
2a00:1028:83xx::/40/1045610no
2a00:1028:83xx::/40/965610no
2a00:1028:83xx::/40/885610no
2a00:1028:83xx::/40/805610no
2a00:1028:83xx::/40/725610no
2a00:1028:83xx::/40/645610no
2a00:1028:83xx::/40/565610no
2a00:1028:83xx::/40/485610no
2a00:1028:83xx::/40/405610no
2a00:1028:3xx::/40/325610no
2a00:10a8:83xx::/40/2439596no
2a00:9028:83xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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