IP Spoof on TZ400

DisaRicks

Hi everybody,

i 've a probleme with a Packet.

"IP Spoof Checker failed recorded in module network"

i realy don't know where to look to find the solution.

My Ip is 172.20.85.40

My second IP is 172.20.30.40 (another NIC in the same computer)

If i create a route in my computer to go to the gateway 172.20.85.254 and make a TELNET 77.62.163.231 10511, i find the red lines in the packet Monitor

If i remove the route in the computer, i use the original gateway 172.20.30.254. With the same telnet 77.62.163.231 10511, il see the black lines in the packet monitor.

How can i resolve this issue?

I'm completly lost....

Thank you very much for your further help.

Eric

BWC

Eric@DisaRicks I assume 172.20.85.254 and 172.20.30.254 are bound to your SonicWall? 172.20.30.254 to Interface X4 and what about 172.20.85.254?

The SNWL is not expecting 172.20.85.0/24 as src address arriving (ingres) from X4, so I guess 172.20.85.254 is not bound to X4?

--Michael@BWC

Nevyaditha

HI @DisaRicks ,

Please find the KB below :

https://www.sonicwall.com/support/knowledge-base/how-can-i-resolve-drop-code-ip-spoof/180118173855772/