Logo

Session Report

Summary:
Test run at: 2018-05-30 06:35:47 GMT
Client Prefix (v4): 213.172.96.x/24
Client AS (v4): 25394 (MK-NETZDIENSTE-AS)
IPv4 Probes: 99
Client Prefix (v6): 2001:1640:xx::/40
Client AS (v6): 25394 (MK-NETZDIENSTE-AS)
IPv6 Probes: 65
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedblocked
Routable blockedblocked
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.
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 (213.172.96.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
213.172.96.x/24/31UNROUTEDnatblock
213.172.96.x/24/30UNROUTEDnatblock
213.172.96.x/24/29UNROUTEDnatblock
213.172.96.x/24/28UNROUTEDnatblock
213.172.96.x/24/2725394rewritten
213.172.96.x/24/26UNROUTEDnatblock
213.172.96.x/24/25UNROUTEDnatblock
213.172.96.x/24/24UNROUTEDnatblock
213.172.97.x/24/23UNROUTEDnatblock
213.172.98.x/24/22UNROUTEDnatblock
213.172.100.x/24/21UNROUTEDnatblock
213.172.104.x/24/20UNROUTEDnatblock
213.172.112.x/24/19UNROUTEDnatblock
213.172.64.x/24/18UNROUTEDnatblock
213.172.32.x/24/17UNROUTEDnatblock
213.172.224.x/24/16UNROUTEDnatblock
213.173.96.x/24/15UNROUTEDnatblock
213.174.96.x/24/14UNROUTEDnatblock
213.168.96.x/24/13UNROUTEDnatblock
213.164.96.x/24/12UNROUTEDnatblock
213.188.96.x/24/11UNROUTEDnatblock
213.140.96.x/24/10UNROUTEDnatblock
213.236.96.x/24/9UNROUTEDnatblock
213.44.96.x/24/8UNROUTEDnatblock

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.
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 probes:
Spoofed source addressDestinationReceived
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:1640:xx::/40/120UNROUTEDnatblock
2001:1640:xx::/40/112UNROUTEDnatblock
2001:1640:xx::/40/104UNROUTEDnatblock
2001:1640:xx::/40/96UNROUTEDnatblock
2001:1640:xx::/40/88UNROUTEDnatblock
2001:1640:xx::/40/80UNROUTEDnatblock
2001:1640:xx::/40/72UNROUTEDnatblock
2001:1640:xx::/40/64UNROUTEDnatblock
2001:1640:xx::/40/56UNROUTEDnatblock
2001:1640:xx::/40/48UNROUTEDnatblock
2001:1640:xx::/40/40UNROUTEDnatblock
2001:1640:80xx::/40/32UNROUTEDnatblock
2001:16c0:xx::/40/24UNROUTEDnatblock
2001:9640:xx::/40/16UNROUTEDnatblock

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.
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