Logo

Session Report

Summary:
Test run at: 2021-07-30 18:04:01 GMT
Client Prefix (v4): 205.155.69.x/24
Client AS (v4): 2152 (CSUNET-NW)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /31

Meaning of result status in column:

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.
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 (205.155.69.x/24) can spoof 1 neighboring addresses (within your /31 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
205.155.69.x/24/312152yes
205.155.69.x/24/302152natblock
205.155.69.x/24/292152natblock
205.155.69.x/24/282152natblock
205.155.69.x/24/272152natblock
205.155.69.x/24/262152natblock
205.155.69.x/24/252152natblock
205.155.69.x/24/242152natblock
205.155.68.x/24/232152natblock
205.155.71.x/24/222152natblock
205.155.65.x/24/21257natblock
205.155.77.x/24/202152natblock
205.155.85.x/24/192152natblock
205.155.101.x/24/182152natblock
205.155.5.x/24/1714212natblock
205.155.197.x/24/162152natblock
205.154.69.x/24/152152natblock
205.153.69.x/24/14UNROUTEDnatblock
205.159.69.x/24/13UNROUTEDnatblock
205.147.69.x/24/127385natblock
205.139.69.x/24/113561natblock
205.187.69.x/24/107029natblock
205.219.69.x/24/93561natblock
205.27.69.x/24/88003natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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