Logo

Session Report

Summary:
Test run at: 2019-06-23 08:05:37 GMT
Client Prefix (v4): 199.91.196.x/24
Client AS (v4): 27500 (ICANN-MEETINGS)
IPv4 Probes: 93
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
Largest spoofable neighbor prefix length none
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 (199.91.196.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.91.196.x/24/3127500sendto
199.91.196.x/24/3027500natblock
199.91.196.x/24/2927500sendto
199.91.196.x/24/2827500sendto
199.91.196.x/24/2727500natblock
199.91.196.x/24/2627500natblock
199.91.196.x/24/2527500sendto
199.91.196.x/24/2427500natblock
199.91.197.x/24/2327500natblock
199.91.198.x/24/2227500sendto
199.91.192.x/24/2127500sendto
199.91.204.x/24/2040727natblock
199.91.212.x/24/1936493natblock
199.91.228.x/24/18397422natblock
199.91.132.x/24/17UNROUTEDnatblock
199.91.68.x/24/1610480sendto
199.90.196.x/24/156559sendto
199.89.196.x/24/1411215sendto
199.95.196.x/24/133356sendto
199.83.196.x/24/1246650natblock
199.75.196.x/24/113356natblock
199.123.196.x/24/10UNROUTEDsendto
199.27.196.x/24/953586natblock
199.219.196.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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