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Session Report

Summary:
Test run at: 2021-02-27 16:43:48 GMT
Client Prefix (v4): 45.56.157.x/24
Client AS (v4): 36351 (SOFTLAYER)
IPv4 Probes: 69
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 (45.56.157.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
45.56.157.x/24/3136351natblock
45.56.157.x/24/3036351yes
45.56.157.x/24/2936351yes
45.56.157.x/24/2836351yes
45.56.157.x/24/2736351yes
45.56.157.x/24/2636351yes
45.56.157.x/24/2536351yes
45.56.157.x/24/2436351yes
45.56.156.x/24/23262287natblock
45.56.159.x/24/22UNROUTEDnatblock
45.56.153.x/24/2136351natblock
45.56.149.x/24/2036351natblock
45.56.141.x/24/19133752natblock
45.56.189.x/24/18394868natblock
45.56.221.x/24/1713768natblock
45.56.29.x/24/1616591natblock
45.57.157.x/24/1555286natblock
45.58.157.x/24/1446844natblock
45.60.157.x/24/1319551natblock
45.48.157.x/24/1220001natblock
45.40.157.x/24/11398101natblock
45.24.157.x/24/107018natblock
45.120.157.x/24/9134835natblock
45.184.157.x/24/8269794natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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.
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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