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Session Report

Summary:
Test run at: 2017-04-06 18:20:50 GMT
Client Prefix (v4): 208.81.1.x/24
Client AS (v4): 18451 (LESNET)
IPv4 Probes: 90
Client Prefix (v6): 2605:e200:xx::/40
Client AS (v6): 18451 (LESNET)
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 none/88
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 (208.81.1.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
208.81.1.x/24/3118451rewritten
208.81.1.x/24/3018451rewritten
208.81.1.x/24/2918451natblock
208.81.1.x/24/2818451rewritten
208.81.1.x/24/2718451rewritten
208.81.1.x/24/2618451rewritten
208.81.1.x/24/2518451rewritten
208.81.1.x/24/2418451rewritten
208.81.0.x/24/2318451rewritten
208.81.3.x/24/2218451rewritten
208.81.5.x/24/2118451rewritten
208.81.9.x/24/2030400sendto
208.81.17.x/24/19UNROUTEDsendto
208.81.33.x/24/1819240sendto
208.81.65.x/24/1714600sendto
208.81.129.x/24/1623052sendto
208.80.1.x/24/1533302sendto
208.83.1.x/24/1418905sendto
208.85.1.x/24/1340244sendto
208.89.1.x/24/1216908sendto
208.65.1.x/24/1136143sendto
208.113.1.x/24/1021570sendto
208.17.1.x/24/91239sendto
208.209.1.x/24/8701sendto

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.
rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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).
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
2605:e200:xx::/40/12018451yes
2605:e200:xx::/40/11218451yes
2605:e200:xx::/40/10418451yes
2605:e200:xx::/40/9618451yes
2605:e200:xx::/40/8818451yes
2605:e200:xx::/40/8018451sendto
2605:e200:xx::/40/7218451sendto
2605:e200:xx::/40/6418451sendto
2605:e200:xx::/40/5618451sendto
2605:e200:xx::/40/4818451sendto
2605:e200:xx::/40/4018451sendto
2605:e200:80xx::/40/3218451sendto
2605:e280:xx::/40/24UNROUTEDsendto
2605:6200:xx::/40/16UNROUTEDsendto

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
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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