Re: help regarding IP address spoofing (when using nmap)

It was running as root only...

Also, no the address didn't belong to the interface,  and I was spoofing
it...

So is there no way to spoof packet IP addresses ?

On Thu, 2 Feb 2023, 18:59 J. Hellenthal, <[email protected]> wrote:

> On Thu, Feb 02, 2023 at 04:19:57PM +0530, Sambuddho Chakravarty wrote:
> >    Hi All
> >     I am a relatively newbie to FreeBSD (earlier was running
> >    Linux). I am running FreeBSD 13.1.
> >    I am trying to run nmap with source IP address spoofing
> >    (for some academic purposes). It works fine with Linux
> >    but on FreeBSD I get the following error:
> >    # nmap -e re0 -S 192.168.17.92 -sS 143.110.249.18  -p 8080 -Pn
> >    Starting Nmap 7.93 ( https://nmap.org ) at 2023-02-02 16:04 IST
> >    NSOCK ERROR [0.0170s] mksock_bind_addr(): Bind to 192.168.17.92:0
> failed
> >    (IOD #1): Can't assign requested address (49)
> >    NSOCK ERROR [0.0170s] mksock_bind_addr(): Bind to 192.168.17.92:0
> failed
> >    (IOD #2): Can't assign requested address (49)
> >    It works fine without the source spoofing but doesn't when I use
> >    it. I can however use my own machine's source IP address with
> >    the '-S' option.
> >    --
> >    best,
> >    sambuddho
>
> sudo(8) or su(1) ?
>
> An address should also be assigned to a interface for it to be bound to.
>
> --
> The fact that there's a Highway to Hell but only a Stairway to Heaven says
> a lot about anticipated traffic volume.
>