Logo

Session Report

Summary:
Test run at: 2019-04-30 02:19:58 GMT
Client Prefix (v4): 120.29.100.x/24
Client AS (v4): 17639 (CONVERGE-AS)
IPv4 Probes: 93
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 (120.29.100.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
120.29.100.x/24/3117639rewritten
120.29.100.x/24/3017639rewritten
120.29.100.x/24/2917639rewritten
120.29.100.x/24/2817639natblock
120.29.100.x/24/2717639rewritten
120.29.100.x/24/2617639rewritten
120.29.100.x/24/2517639natblock
120.29.100.x/24/2417639rewritten
120.29.101.x/24/2317639rewritten
120.29.102.x/24/2217639rewritten
120.29.96.x/24/2117639natblock
120.29.108.x/24/2017639rewritten
120.29.116.x/24/1917639rewritten
120.29.68.x/24/1817639rewritten
120.29.36.x/24/179313rewritten
120.29.228.x/24/1638764natblock
120.28.100.x/24/15132199rewritten
120.31.100.x/24/1438372natblock
120.25.100.x/24/1337963natblock
120.21.100.x/24/12133612rewritten
120.13.100.x/24/114837rewritten
120.61.100.x/24/1017813natblock
120.93.100.x/24/97514rewritten
120.157.100.x/24/81221rewritten

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