Re: How Nping works at the OS/ kernel level

[Jack Dangler <tdldev () gmail com>]

On 8/2/23 08:55, Subhra Das wrote:
> Hi,
>
> I carried out the below experiment. Could anyone help me to find out 
> which process (at user/ kernel level) on the remote node is responding 
> to nping TCP packets. Is there any flow diagram to understand the same
>
> a) On Node 1 installed nping tool
>
> b) On Node 2 removed nping tool
>
> c) Executed the *below* command on Node 1. It still works. Could you 
> please let us know how should we go about finding which process is 
> responding to nping tcp packets on Node 2, which doesn’t have the 
> nping module installed
>
> *nping -c 1 --tcp -p 13567 <IP Address on Node 2>*
>
>
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Unless I am mistaken, nping doesn't need to be installed at both ends. 
nping is issuing a ping request to the other node. When ping runs, it 
sends an ICMP "Echo" request to the interface and waits to get a 
response. Once the target receives the request, it (should) respond by 
sending a "Reply" packet.


Jack

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