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Session Report

Summary:
Test run at: 2017-06-11 15:13:48 GMT
Client Prefix (v4): 195.181.219.x/24
Client AS (v4): 24806 (INTERNET-CZ)
IPv4 Probes: 131
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /24
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 Adjacent Netblock Testing:

Your host (195.181.219.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
195.181.219.x/24/3124806yes
195.181.219.x/24/3024806yes
195.181.219.x/24/2924806yes
195.181.219.x/24/2824806yes
195.181.219.x/24/2724806yes
195.181.219.x/24/2624806yes
195.181.219.x/24/2524806yes
195.181.219.x/24/2424806yes
195.181.218.x/24/2324806no
195.181.217.x/24/2224806no
195.181.223.x/24/2124806no
195.181.211.x/24/2024806no
195.181.203.x/24/1943016no
195.181.251.x/24/1848689no
195.181.155.x/24/17203424no
195.181.91.x/24/1648159no
195.180.219.x/24/156659no
195.183.219.x/24/142686no
195.177.219.x/24/1360168no
195.189.219.x/24/1241024no
195.165.219.x/24/111759no
195.149.219.x/24/1034347no
195.245.219.x/24/9UNROUTEDno
195.53.219.x/24/83352no

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)

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.
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