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Session Report

Summary:
Test run at: 2020-08-20 00:37:47 GMT
Client Prefix (v4): 193.138.218.x/24
Client AS (v4): 39351 (ESAB-AS)
IPv4 Probes: 75
Client Prefix (v6): 2a03:1b20:xx::/40
Client AS (v6): 39351 (ESAB-AS)
IPv6 Probes: 68
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
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.

Warnings:

IPv4 Adjacent Netblock Testing:

Your host (193.138.218.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
193.138.218.x/24/3139351natblock
193.138.218.x/24/3039351natblock
193.138.218.x/24/2939351natblock
193.138.218.x/24/2839351natblock
193.138.218.x/24/2739351natblock
193.138.218.x/24/2639351natblock
193.138.218.x/24/2539351natblock
193.138.218.x/24/2439351natblock
193.138.219.x/24/2339351natblock
193.138.216.x/24/2239351natblock
193.138.222.x/24/21UNROUTEDnatblock
193.138.210.x/24/2034284natblock
193.138.202.x/24/1934273natblock
193.138.250.x/24/1831477natblock
193.138.154.x/24/17197393natblock
193.138.90.x/24/16UNROUTEDnatblock
193.139.218.x/24/15UNROUTEDnatblock
193.136.218.x/24/141930natblock
193.142.218.x/24/1342664natblock
193.130.218.x/24/12UNROUTEDnatblock
193.154.218.x/24/111901natblock
193.170.218.x/24/101853natblock
193.202.218.x/24/9UNROUTEDnatblock
193.10.218.x/24/81653natblock

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 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a03:1b20:xx::/40/12039351natblock
2a03:1b20:xx::/40/11239351natblock
2a03:1b20:xx::/40/10439351natblock
2a03:1b20:xx::/40/9639351natblock
2a03:1b20:xx::/40/8839351natblock
2a03:1b20:xx::/40/8039351natblock
2a03:1b20:xx::/40/7239351natblock
2a03:1b20:xx::/40/6439351natblock
2a03:1b20:xx::/40/5639351natblock
2a03:1b20:xx::/40/4839351natblock
2a03:1b20:xx::/40/40UNROUTEDnatblock
2a03:1b20:80xx::/40/32UNROUTEDnatblock
2a03:1ba0:xx::/40/24UNROUTEDnatblock
2a03:9b20: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.
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