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Session Report

Summary:
Test run at: 2020-08-20 14:31:57 GMT
Client Prefix (v4): 185.65.134.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 (185.65.134.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
185.65.134.x/24/3139351natblock
185.65.134.x/24/3039351natblock
185.65.134.x/24/2939351natblock
185.65.134.x/24/2839351natblock
185.65.134.x/24/2739351natblock
185.65.134.x/24/2639351natblock
185.65.134.x/24/2539351natblock
185.65.134.x/24/2439351natblock
185.65.135.x/24/2339351natblock
185.65.132.x/24/2239351natblock
185.65.130.x/24/21201358natblock
185.65.142.x/24/20207367natblock
185.65.150.x/24/19197068natblock
185.65.166.x/24/18201508natblock
185.65.198.x/24/17197637natblock
185.65.6.x/24/1621235natblock
185.64.134.x/24/15201679natblock
185.67.134.x/24/1439906natblock
185.69.134.x/24/1361031natblock
185.73.134.x/24/12UNROUTEDnatblock
185.81.134.x/24/113348natblock
185.97.134.x/24/1060268natblock
185.1.134.x/24/9UNROUTEDnatblock
185.193.134.x/24/8UNROUTEDnatblock

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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