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Session Report

Summary:
Test run at: 2024-04-12 16:19:42 GMT
Client Prefix (v4): 192.136.136.x/24
Client AS (v4): 10745 (ARIN-ASH-CHA)
IPv4 Probes: 66
Client Prefix (v6): 2001:500:xx::/40
Client AS (v6): 395418 (ARIN-CHA)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedunknown
Routable blockedunknown
Largest spoofable neighbor prefix length nonenone
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.
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 (192.136.136.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
192.136.136.x/24/3110745natblock
192.136.136.x/24/3010745natblock
192.136.136.x/24/2910745natblock
192.136.136.x/24/2810745natblock
192.136.136.x/24/2710745natblock
192.136.136.x/24/2610745natblock
192.136.136.x/24/2510745natblock
192.136.136.x/24/2410745natblock
192.136.137.x/24/23749natblock
192.136.138.x/24/22749natblock
192.136.140.x/24/2146375natblock
192.136.128.x/24/20749natblock
192.136.152.x/24/19UNROUTEDnatblock
192.136.168.x/24/1833728natblock
192.136.200.x/24/1711427natblock
192.136.8.x/24/16UNROUTEDnatblock
192.137.136.x/24/15UNROUTEDnatblock
192.138.136.x/24/14UNROUTEDnatblock
192.140.136.x/24/13UNROUTEDnatblock
192.128.136.x/24/12UNROUTEDnatblock
192.152.136.x/24/11UNROUTEDnatblock
192.168.136.x/24/10UNROUTEDnatblock
192.200.136.x/24/936001natblock
192.8.136.x/24/836224natblock

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.

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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:500:xx::/40/120395418no
2001:500:xx::/40/112395418no
2001:500:xx::/40/104395418no
2001:500:xx::/40/96395418no
2001:500:xx::/40/88395418no
2001:500:xx::/40/80395418no
2001:500:xx::/40/72395418no
2001:500:xx::/40/64395418no
2001:500:xx::/40/56395418no
2001:500:xx::/40/48395418no
2001:500:xx::/40/40UNROUTEDno
2001:500:80xx::/40/32UNROUTEDno
2001:580:xx::/40/241798no
2001:8500:xx::/40/161221no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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