Home page logo
/

nmap-dev logo Nmap Development mailing list archives

Re: Nmap on VPS
From: Shinnok <admin () shinnok com>
Date: Fri, 24 Jun 2011 00:18:20 +0300

Hi,

Nmap defaults to simple CONNECT scan if not run as root on a default
scan with no additional arguments.
If run with root privileges then nmap does a SYN scan[1], thus I would suspect
some firewall settings on your office network that mitigate the SYN scan.
Run nmap with the -v argument to get more detailed output.

Also look for the line:
Not shown: XXX filtered/closed ports.

Filtered would hint that yes, a firewall is in place and could potentially block
the SYN scan.

[1] http://nmap.org/book/man-port-scanning-techniques.html

On 6/23/2011 6:14 PM, Jo�o Daniel Neves wrote:
Hello,
I have a virtualized server (VPS). I use this server to host my blog. I have installed Nmap...But it looks like that 
Nmap is not working proprety. When I scan my office (without root privileges), Nmap reports me some open ports. No 
problem yet. But if I scan as root, Nmap say that allscaned ports are closed.
I did the same kind of scan for both (priviliged e non priviliged)I scan a OPEN port with root privileges and Nmap port 
report filtred.
The truth is that some ports are really open.
BTW: I did a normal installation: yum install nmap5.21.rpm
Does anybody knows what is happening?                                   
_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/

_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault