Date: Thu, 2 Feb 2023 13:29:47 +0000 From: "J. Hellenthal" <jhellenthal@dataix.net> To: Sambuddho Chakravarty <sambuddho@iiitd.ac.in> Cc: freebsd-security@freebsd.org Subject: Re: help regarding IP address spoofing (when using nmap) Message-ID: <Y9u6yyIfz8nHpb5c@DataIX.net> In-Reply-To: <CAK1-MKcNetGHrg5VpHpmrE%2BXDf%2BSvn1pp-rWd%2BTzU9ay76frfw@mail.gmail.com> References: <CAK1-MKcNetGHrg5VpHpmrE%2BXDf%2BSvn1pp-rWd%2BTzU9ay76frfw@mail.gmail.com>
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[-- Attachment #1 --] 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. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQFUBAEBCAA+FiEEeBtiLAqm/fi0bzsxMu77BFzgpwgFAmPbusogFIAAAAAAFgAB amhlbGxlbnRoYWxARGF0YUlYLm5ldCEACgkQMu77BFzgpwjuBAgAjk+xf1w1TxdG nf8V9I+YYjfanuZrnrz0kr//RjppPE5nwL5nD/k/tjGRK4gaBW3cyZMDIUIKBMhJ 3lD+Cb/5WtObFGh8ARuBdJl0z9IB56OipUZWLPdKIyaYazD8gbPgjZ2wqlhHzDsK kK1KFibIngaC0AJBdBfun3tsEG5aim6I2obRJXV1JWQsrqOCMsLC2c0IYohgCrEt sKEdvlNe4ZKmOVd+uDwdtBeMVsyz1GGfRYxuLoY32oXAeJY+SlmX39TQjV+svFf6 KQlqzd3SpvgCokkR4zTX5GvibKY/QfUbxF18aSTlV14V49k3BMzdjLA/DMogoDpW SYSKXmEdzQ== =+2Q8 -----END PGP SIGNATURE-----help
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