Re: Socket type not supported..

[Ronald Huizer <ronald.huizer () wxs nl>]

Lamont Granquist wrote:

> On Thu, 14 Jan 1999, Hroi Sigurdsson wrote:
> > This occurs everytime when run as root:
> >
> > [root@io hroi]# nmap -v localhost
>
> well, don't run it against localhost for starters (unless you use -sT or
> run as non-root).
>
> > Starting nmap V. 2.03 by Fyodor (fyodor () dhp com, www.insecure.org/nmap/)
> > pcap_open_live: socket: Socket type not supported
> > QUITTING!
>
> i'm going to guess that nmap is passing the loopback device to
> pcap_open_live and that SOCK_PACKET is (naturally) not supported on the
> loopback device.  try scanning something other than localhost:
>
> nmap -vF -sS -P0 www.microsoft.com
>
> > Only tested on linux 2.2.0-pre and nmap 2.03 and 2.04. Something missing
> > in the kernel perhaps? Or is it a bug in pcap/nmap?
>
> if that doesn't work, then my guess would be that SOCK_PACKET wasn't
> compiled into the kernel, but there doesn't seem to be an option to do
> that in 2.0.36 that i can find (and i wouldn't expect one to have been
> added in 2.2.0, but i haven't looked at the 2.2.0 kernel yet...)
>
> --
> Lamont Granquist                       lamontg () raven genome washington edu
> Dept. of Molecular Biotechnology       (206)616-5735  fax: (206)685-7344
> Box 352145 / Universi[root@localhost /root]# nmap -v localhost
>
>
> PGP pubkey: finger lamontg () raven genome washington edu | pgp -fka

I do not know what the problem is, but nmap seems to be able to scan my
localhost (yes, as root).
Probabely something in the kernel then.

[root@localhost /root]# nmap -v localhost

Starting nmap V. 2.03 by Fyodor (fyodor () dhp com, www.insecure.org/nmap/)
No scantype specified, assuming vanilla tcp connect() scan. Use -sP if you
really don't want to portscan (and just want to see what hosts are up).
Host localhost (127.0.0.1) appears to be up ... good.
Initiating TCP connect() scan against localhost (127.0.0.1)
Adding TCP port 515 (state Open).
The TCP connect scan took 1 seconds to scan 1034 ports.
Interesting ports on localhost (127.0.0.1):
Port    State       Protocol  Service
515     open        tcp        printer

Nmap run completed -- 1 IP address (1 host up) scanned in 1 second


Ronald Huizer - Delft University of Technology -
tw374044 () student twi tudelft nl