Re: Force TCP traceroute

[Fyodor <fyodor () nmap org>]

On Fri, Oct 16, 2015 at 6:35 AM, Jochen Bartl <jochenbartl () mailbox org>
wrote:

> I would like to be able to trace the path via TCP-syn packets to figure
> out,
> which firewall in the path is most likely filtering the packets.

Perhaps this is a job for Nping (https://nmap.org/nping/), which comes with
Nmap and is designed for special case low-level packet crafting like this.
Use a command like:

nping --tcp -p [portnum] --traceroute [host]

Nping will start with a TTL of 1 and increase it for each packet sent.  And
it shows you each packet sent and received so you know exactly what is
going on.

Cheers,
Fyodor

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