Logo

Session Report

Summary:
Test run at: 2022-06-14 07:21:34 GMT
Client Prefix (v4): 41.191.101.x/24
Client AS (v4): 37089 (ALINK-CM-AS)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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 (41.191.101.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
41.191.101.x/24/3137089rewritten
41.191.101.x/24/3037089rewritten
41.191.101.x/24/2937089rewritten
41.191.101.x/24/2837089rewritten
41.191.101.x/24/2737089natblock
41.191.101.x/24/2637089rewritten
41.191.101.x/24/2537089rewritten
41.191.101.x/24/2437089rewritten
41.191.100.x/24/23UNROUTEDrewritten
41.191.103.x/24/2237089rewritten
41.191.97.x/24/2137087rewritten
41.191.109.x/24/2036974rewritten
41.191.117.x/24/1937185rewritten
41.191.69.x/24/1837190rewritten
41.191.37.x/24/1736974rewritten
41.191.229.x/24/1630844rewritten
41.190.101.x/24/1536999rewritten
41.189.101.x/24/1436974rewritten
41.187.101.x/24/1320928rewritten
41.183.101.x/24/1237028rewritten
41.175.101.x/24/1130844rewritten
41.159.101.x/24/1016058rewritten
41.255.101.x/24/921003rewritten
41.63.101.x/24/837277rewritten

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.
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.
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