Logo

Session Report

Summary:
Test run at: 2023-11-24 13:08:40 GMT
Client Prefix (v4): 191.241.23.x/24
Client AS (v4): 263541
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
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 (191.241.23.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.241.23.x/24/31263541rewritten
191.241.23.x/24/30263541rewritten
191.241.23.x/24/29263541rewritten
191.241.23.x/24/28263541rewritten
191.241.23.x/24/27263541rewritten
191.241.23.x/24/26263541rewritten
191.241.23.x/24/25263541rewritten
191.241.23.x/24/24263541rewritten
191.241.22.x/24/23263541rewritten
191.241.21.x/24/22263541rewritten
191.241.19.x/24/21268976rewritten
191.241.31.x/24/20263664rewritten
191.241.7.x/24/19263663rewritten
191.241.55.x/24/18263667rewritten
191.241.87.x/24/1753076rewritten
191.241.151.x/24/16262784rewritten
191.240.23.x/24/1528202rewritten
191.243.23.x/24/14263276rewritten
191.245.23.x/24/1322085rewritten
191.249.23.x/24/1218881rewritten
191.225.23.x/24/1126615rewritten
191.209.23.x/24/1027699rewritten
191.177.23.x/24/928573rewritten
191.113.23.x/24/87418rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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