Server with 2 interfaces sends ping to the 2nd interface ?!

Question

Hi,

I have a server 2 interfaces

Interface 1 - [10.21.30.16/24]

interface 2 - [10.21.40.16/24]

I'm trying to ping from the 10.21.30.16 interface to a Server 10.11.30.15, and what happens is the ping goes from 10.21.40.16 to its relataive gateway and fails, because on the firewall side Traffic from [10.21.40.0] to Server 10.21.30.15 is disallowed.

https://imgur.com/a/EjROgG5

What is the reason for this and how to avoid this problem ?

Answer 1

Modify the firewall settings to allow the traffic or update the local routing table to direct the traffic via the other interface (assuming that's allowed)

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hth

Marcin

Answer 2

Hello,

 

Thank you for posting in Q&A forum.

As we can see, when you initiate a ping request, it goes from interface 2 - [10.21.40.16/24] and route to the default gateway.

Please kindly check your routing table and see if there's any route from 10.21.40.1 to 10.11.30.15. If not please try adding a static route on the server and check if this issue still persists.

Meanwhile, please kindly check if you are able to allow traffic from [10.21.40.0] to 10.21.30.15 on the firewall.

Hope this answer can help you well.

 

Best regards，

Jill Zhou