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Session Report

Summary:
Test run at: 2020-10-08 17:00:44 GMT
Client Prefix (v4): 172.111.181.x/24
Client AS (v4): 199524 (GCORE)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /9
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 (172.111.181.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
172.111.181.x/24/31199524yes
172.111.181.x/24/30199524yes
172.111.181.x/24/29199524yes
172.111.181.x/24/28199524yes
172.111.181.x/24/27199524yes
172.111.181.x/24/26199524yes
172.111.181.x/24/25199524yes
172.111.181.x/24/24199524yes
172.111.180.x/24/2346562yes
172.111.183.x/24/229009yes
172.111.177.x/24/2132489yes
172.111.189.x/24/209009yes
172.111.165.x/24/1940676yes
172.111.149.x/24/189009yes
172.111.245.x/24/179009yes
172.111.53.x/24/16UNROUTEDno
172.110.181.x/24/15UNROUTEDno
172.109.181.x/24/145650yes
172.107.181.x/24/1340676yes
172.103.181.x/24/1225668yes
172.127.181.x/24/117018yes
172.79.181.x/24/105650yes
172.47.181.x/24/921928yes
172.239.181.x/24/8UNROUTEDno

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
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 able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
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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