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Session Report

Summary:
Test run at: 2018-09-04 08:13:23 GMT
Client Prefix (v4): 213.108.25.x/24
Client AS (v4): 197564 (INTERNETSTIFTELSEN)
IPv4 Probes: 124
Client Prefix (v6): 2001:67c:12xx::/40
Client AS (v6): 197564 (INTERNETSTIFTELSEN)
IPv6 Probes: 82
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 none/64
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 (213.108.25.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
213.108.25.x/24/31197564natblock
213.108.25.x/24/30197564natblock
213.108.25.x/24/29197564natblock
213.108.25.x/24/28197564natblock
213.108.25.x/24/27197564natblock
213.108.25.x/24/26197564natblock
213.108.25.x/24/25197564natblock
213.108.25.x/24/24197564natblock
213.108.24.x/24/23197564natblock
213.108.27.x/24/22206897natblock
213.108.29.x/24/2129311natblock
213.108.17.x/24/2049342natblock
213.108.9.x/24/1949300natblock
213.108.57.x/24/1834360natblock
213.108.89.x/24/1757794natblock
213.108.153.x/24/1649715natblock
213.109.25.x/24/1549583natblock
213.110.25.x/24/1449483natblock
213.104.25.x/24/135089natblock
213.100.25.x/24/121257natblock
213.124.25.x/24/119143natblock
213.76.25.x/24/105617natblock
213.44.25.x/24/95410natblock
213.236.25.x/24/812924natblock

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 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501:ec4:7aff:fea8:71a82001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:67c:12xx::/40/120197564yes
2001:67c:12xx::/40/112197564yes
2001:67c:12xx::/40/104197564yes
2001:67c:12xx::/40/96197564yes
2001:67c:12xx::/40/88197564yes
2001:67c:12xx::/40/80197564yes
2001:67c:12xx::/40/72197564yes
2001:67c:12xx::/40/64197564yes
2001:67c:12xx::/40/56197564no
2001:67c:12xx::/40/48197564no
2001:67c:12xx::/40/40UNROUTEDno
2001:67c:92xx::/40/32UNROUTEDno
2001:6fc:12xx::/40/24UNROUTEDno
2001:867c:12xx::/40/161221no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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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