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Session Report

Summary:
Test run at: 2023-04-27 17:39:47 GMT
Client Prefix (v4): 45.13.104.x/24
Client AS (v4): 2027 (MSF)
IPv4 Probes: 60
Client Prefix (v6): 2a0e:e701:11xx::/40
Client AS (v6): 2027 (MSF)
IPv6 Probes: 52
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/48
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 (45.13.104.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
45.13.104.x/24/312027rewritten
45.13.104.x/24/302027rewritten
45.13.104.x/24/292027rewritten
45.13.104.x/24/282027rewritten
45.13.104.x/24/272027rewritten
45.13.104.x/24/262027rewritten
45.13.104.x/24/252027rewritten
45.13.104.x/24/242027rewritten
45.13.105.x/24/232027rewritten
45.13.106.x/24/222027rewritten
45.13.108.x/24/2139855rewritten
45.13.96.x/24/2051548rewritten
45.13.120.x/24/19201877rewritten
45.13.72.x/24/18203061rewritten
45.13.40.x/24/1739452rewritten
45.13.232.x/24/16UNROUTEDrewritten
45.12.104.x/24/15212384rewritten
45.15.104.x/24/1460079rewritten
45.9.104.x/24/13200780rewritten
45.5.104.x/24/12266096rewritten
45.29.104.x/24/117018rewritten
45.45.104.x/24/105769rewritten
45.77.104.x/24/920473rewritten
45.141.104.x/24/857866rewritten

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
2001:48d0:101:501::1592001:40b0:7500:280::5458:517ano
2001:4978:1fb:6400::d22001:40b0:7500:280::5458:517ano
2001:49aa:111:aa00::112001:40b0:7500:280::5458:517ano
fd11:1111:1111::11112001:40b0:7500:280::5458:517ano
2001:48d0:101:501::1592001:48d0:101:501::242no
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
2001:48d0:101:501::1592001:48d0:101:501::247no
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
2001:48d0:101:501::1592001:610:510:115:192:42:115:98no
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
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
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
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a0e:e701:11xx::/40/1202027yes
2a0e:e701:11xx::/40/1122027yes
2a0e:e701:11xx::/40/1042027yes
2a0e:e701:11xx::/40/962027yes
2a0e:e701:11xx::/40/882027yes
2a0e:e701:11xx::/40/802027yes
2a0e:e701:11xx::/40/722027yes
2a0e:e701:11xx::/40/642027yes
2a0e:e701:11xx::/40/562027yes
2a0e:e701:11xx::/40/482027yes
2a0e:e701:11xx::/40/402027no
2a0e:e701:91xx::/40/322027no
2a0e:e781:11xx::/40/24UNROUTEDno
2a0e:6701:11xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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