Logo

Session Report

Summary:
Test run at: 2022-08-01 13:59:33 GMT
Client Prefix (v4): 83.144.71.x/24
Client AS (v4): 6830 (LibertyGlobal)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /8
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 (83.144.71.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
83.144.71.x/24/316830natblock
83.144.71.x/24/306830natblock
83.144.71.x/24/296830yes
83.144.71.x/24/286830yes
83.144.71.x/24/276830yes
83.144.71.x/24/266830yes
83.144.71.x/24/256830yes
83.144.71.x/24/246830yes
83.144.70.x/24/236830yes
83.144.69.x/24/226830yes
83.144.67.x/24/216830yes
83.144.79.x/24/206830yes
83.144.87.x/24/196830yes
83.144.103.x/24/186830yes
83.144.7.x/24/17196773yes
83.144.199.x/24/1633965yes
83.145.71.x/24/1512670yes
83.146.71.x/24/1428745yes
83.148.71.x/24/138866yes
83.152.71.x/24/1212322yes
83.128.71.x/24/1115435yes
83.176.71.x/24/101257yes
83.208.71.x/24/95610yes
83.16.71.x/24/85617yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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 able to spoof routable, non-adjacent source addresses through the first 10 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