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Session Report

Summary:
Test run at: 2021-06-30 01:39:01 GMT
Client Prefix (v4): 157.131.109.x/24
Client AS (v4): 46375 (AS-SONICTELECOM)
IPv4 Probes: 66
Client Prefix (v6): 2602:249:d8xx::/40
Client AS (v6): 46375 (AS-SONICTELECOM)
IPv6 Probes: 56
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/64
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 (157.131.109.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
157.131.109.x/24/3146375rewritten
157.131.109.x/24/3046375rewritten
157.131.109.x/24/2946375rewritten
157.131.109.x/24/2846375rewritten
157.131.109.x/24/2746375rewritten
157.131.109.x/24/2646375rewritten
157.131.109.x/24/2546375rewritten
157.131.109.x/24/2446375rewritten
157.131.108.x/24/2346375rewritten
157.131.111.x/24/2246375rewritten
157.131.105.x/24/2146375rewritten
157.131.101.x/24/2046375rewritten
157.131.125.x/24/1946375rewritten
157.131.77.x/24/1846375rewritten
157.131.45.x/24/17UNROUTEDrewritten
157.131.237.x/24/1646375rewritten
157.130.109.x/24/15701rewritten
157.129.109.x/24/1441701rewritten
157.135.109.x/24/13UNROUTEDrewritten
157.139.109.x/24/1220252rewritten
157.147.109.x/24/112527rewritten
157.163.109.x/24/10UNROUTEDrewritten
157.195.109.x/24/9UNROUTEDrewritten
157.3.109.x/24/87671rewritten

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::1592001:48d0:101:501::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
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fno
fd11:1111:1111::11112001:df0:4:800:21c:c0ff:feb2:ad5fno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2602:249:d8xx::/40/12046375yes
2602:249:d8xx::/40/11246375yes
2602:249:d8xx::/40/10446375yes
2602:249:d8xx::/40/9646375yes
2602:249:d8xx::/40/8846375yes
2602:249:d8xx::/40/8046375yes
2602:249:d8xx::/40/7246375yes
2602:249:d8xx::/40/6446375yes
2602:249:d8xx::/40/5646375no
2602:249:d8xx::/40/4846375no
2602:249:d8xx::/40/4046375no
2602:249:58xx::/40/3246375no
2602:2c9:d8xx::/40/24UNROUTEDno
2602:8249:d8xx::/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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