Logo

Session Report

Summary:
Test run at: 2021-09-27 08:53:51 GMT
Client Prefix (v4): 211.68.123.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
IPv4 Probes: 66
Client Prefix (v6): 2001:da8:2xx::/40
Client AS (v6): 24348 (CNGI-BJ-IX2-AS-AP)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenreceived
Largest spoofable neighbor prefix length none/32
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 (211.68.123.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
211.68.123.x/24/314538rewritten
211.68.123.x/24/304538rewritten
211.68.123.x/24/294538rewritten
211.68.123.x/24/284538rewritten
211.68.123.x/24/274538rewritten
211.68.123.x/24/264538rewritten
211.68.123.x/24/254538rewritten
211.68.123.x/24/244538rewritten
211.68.122.x/24/234538rewritten
211.68.121.x/24/224538rewritten
211.68.127.x/24/214538rewritten
211.68.115.x/24/204538rewritten
211.68.107.x/24/194538rewritten
211.68.91.x/24/184538rewritten
211.68.59.x/24/174538rewritten
211.68.251.x/24/164538rewritten
211.69.123.x/24/154538rewritten
211.70.123.x/24/144538rewritten
211.64.123.x/24/134538rewritten
211.76.123.x/24/129924rewritten
211.84.123.x/24/114538rewritten
211.100.123.x/24/10UNROUTEDrewritten
211.4.123.x/24/92516rewritten
211.196.123.x/24/84766rewritten

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 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.

  

  
IPv6 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242yes
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::247yes
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::1592001:610:510:115:192:42:115:98yes
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:45a6yes
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6yes
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6yes
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4yes
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4yes
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4yes
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
2001:da8:2xx::/40/12024348yes
2001:da8:2xx::/40/11224348yes
2001:da8:2xx::/40/10424348yes
2001:da8:2xx::/40/9624348yes
2001:da8:2xx::/40/8824348yes
2001:da8:2xx::/40/8024348yes
2001:da8:2xx::/40/7224348yes
2001:da8:2xx::/40/6424348yes
2001:da8:2xx::/40/5624348yes
2001:da8:2xx::/40/4824348yes
2001:da8:2xx::/40/4023910yes
2001:da8:82xx::/40/3223910yes
2001:d28:2xx::/40/249621no
2001:8da8:2xx::/40/161221no

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
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