Logo

Session Report

Summary:
Test run at: 2022-04-26 19:02:45 GMT
Client Prefix (v4): 212.5.158.x/24
Client AS (v4): 8866 (BTC-AS)
IPv4 Probes: 60
Client Prefix (v6): 2a01:5a8:2xx::/40
Client AS (v6): 8866 (BTC-AS)
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 (212.5.158.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
212.5.158.x/24/318866rewritten
212.5.158.x/24/308866rewritten
212.5.158.x/24/298866rewritten
212.5.158.x/24/288866rewritten
212.5.158.x/24/278866rewritten
212.5.158.x/24/268866rewritten
212.5.158.x/24/258866rewritten
212.5.158.x/24/248866rewritten
212.5.159.x/24/238866rewritten
212.5.156.x/24/22202690rewritten
212.5.154.x/24/218866rewritten
212.5.150.x/24/208866rewritten
212.5.142.x/24/198866rewritten
212.5.190.x/24/186863rewritten
212.5.222.x/24/176855rewritten
212.5.30.x/24/1620676rewritten
212.4.158.x/24/1512570rewritten
212.7.158.x/24/148881rewritten
212.1.158.x/24/139105rewritten
212.13.158.x/24/129198rewritten
212.21.158.x/24/1125374rewritten
212.37.158.x/24/1039642rewritten
212.69.158.x/24/913767rewritten
212.133.158.x/24/88869rewritten

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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a01:5a8:2xx::/40/1208866yes
2a01:5a8:2xx::/40/1128866yes
2a01:5a8:2xx::/40/1048866yes
2a01:5a8:2xx::/40/968866yes
2a01:5a8:2xx::/40/888866yes
2a01:5a8:2xx::/40/808866yes
2a01:5a8:2xx::/40/728866yes
2a01:5a8:2xx::/40/648866yes
2a01:5a8:2xx::/40/568866no
2a01:5a8:2xx::/40/488866no
2a01:5a8:2xx::/40/408866no
2a01:5a8:82xx::/40/328866no
2a01:528:2xx::/40/24UNROUTEDno
2a01:85a8:2xx::/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.
Last Modified