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Session Report

Summary:
Test run at: 2017-03-21 08:30:27 GMT
Client Prefix (v4): 219.230.111.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
IPv4 Probes: 104
Client Prefix (v6): 2001:da8:10xx::/40
Client AS (v6): 23910 (CNGI-CERNET2-AS-AP)
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 Adjacent Netblock Testing:

Your host (219.230.111.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
219.230.111.x/24/314538rewritten
219.230.111.x/24/304538rewritten
219.230.111.x/24/294538rewritten
219.230.111.x/24/284538rewritten
219.230.111.x/24/274538rewritten
219.230.111.x/24/264538rewritten
219.230.111.x/24/254538rewritten
219.230.111.x/24/244538rewritten
219.230.110.x/24/234538rewritten
219.230.109.x/24/224538rewritten
219.230.107.x/24/214538rewritten
219.230.103.x/24/204538rewritten
219.230.127.x/24/194538rewritten
219.230.79.x/24/184538rewritten
219.230.47.x/24/174538rewritten
219.230.239.x/24/164538rewritten
219.231.111.x/24/154538rewritten
219.228.111.x/24/144538rewritten
219.226.111.x/24/134538rewritten
219.238.111.x/24/1217816rewritten
219.246.111.x/24/114538rewritten
219.198.111.x/24/1017676rewritten
219.166.111.x/24/94713rewritten
219.102.111.x/24/82514rewritten

Meaning of status in Received column:

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.

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
2001:da8:10xx::/40/12023910no
2001:da8:10xx::/40/11223910no
2001:da8:10xx::/40/10423910no
2001:da8:10xx::/40/9623910no
2001:da8:10xx::/40/8823910no
2001:da8:10xx::/40/8023910no
2001:da8:10xx::/40/7223910no
2001:da8:10xx::/40/6423910no
2001:da8:10xx::/40/5623910no
2001:da8:10xx::/40/4823910no
2001:da8:10xx::/40/4023910no
2001:da8:90xx::/40/3223910no
2001:d28:10xx::/40/249621no
2001:8da8:10xx::/40/161221no

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:
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