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Session Report

Summary:
Test run at: 2017-08-11 08:24:51 GMT
Client Prefix (v4): 193.163.102.x/24
Client AS (v4): 39839 (DK-HOSTMASTER)
IPv4 Probes: 132
Client Prefix (v6): 2a01:630:xx::/40
Client AS (v6): 39839 (DK-HOSTMASTER)
IPv6 Probes: 86
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
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.

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 (193.163.102.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
193.163.102.x/24/3139839natblock
193.163.102.x/24/3039839natblock
193.163.102.x/24/2939839natblock
193.163.102.x/24/2839839natblock
193.163.102.x/24/2739839natblock
193.163.102.x/24/2639839natblock
193.163.102.x/24/2539839natblock
193.163.102.x/24/2439839natblock
193.163.103.x/24/23UNROUTEDnatblock
193.163.100.x/24/223292natblock
193.163.98.x/24/21UNROUTEDnatblock
193.163.110.x/24/20UNROUTEDnatblock
193.163.118.x/24/193292natblock
193.163.70.x/24/18UNROUTEDnatblock
193.163.38.x/24/173292natblock
193.163.230.x/24/1644328natblock
193.162.102.x/24/15UNROUTEDnatblock
193.161.102.x/24/142119natblock
193.167.102.x/24/131741natblock
193.171.102.x/24/121853natblock
193.179.102.x/24/115588natblock
193.131.102.x/24/103244natblock
193.227.102.x/24/941506natblock
193.35.102.x/24/8197694natblock

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
2a01:630:xx::/40/12039839no
2a01:630:xx::/40/11239839no
2a01:630:xx::/40/10439839no
2a01:630:xx::/40/9639839no
2a01:630:xx::/40/8839839no
2a01:630:xx::/40/8039839no
2a01:630:xx::/40/7239839no
2a01:630:xx::/40/6439839no
2a01:630:xx::/40/5639839no
2a01:630:xx::/40/4839839no
2a01:630:xx::/40/4039839no
2a01:630:80xx::/40/3239839no
2a01:6b0:xx::/40/2415772no
2a01:8630:xx::/40/16UNROUTEDno

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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