Ethical Hacking Learn to find vulnerabilities before the bad guys do! Gain real world hands on hacking experience in our state of the art hacking lab. Course designed and taught by expert instructors with years of penetration testing experience. 12 student maximum in every class. Certification attempt included in every package. | Computer Forensics Training at InfoSec Institute Gain the in-demand skills of a certified computer examiner, learn to recover trace data left behind by fraud, theft, and cybercrime perpetrators. Discover the source of computer crime and abuse at your organization so that it never happens again. All of our class sizes are guaranteed to be 12 students or less to facilitate one-on-one interaction with one of our expert instructors. |

| Subject: | Re: nmap udp scan time |
|---|---|
| Date: | 10 Nov 2007 18:23:24 -0000 |
Hello Kevin, I wish to say something about UDP scan. In UDP scanning, Open port is detected with no response and a Closed port is detected with ICMP PORT UNREACHABLE (Code 3, Type 3) response. Linux kernels limit ICMP error message rates, with Port Unreachable set to 80 per 4 seconds, thereafter implementing a 1/4 second penalty if the count is exceeded. This makes the scan slow !! --- Nikhil Wagholikar Information Security Analyst NII Consulting Web: http://wwww.niiconsulting.com ------------------------------------------------------------------------ This list is sponsored by: Cenzic Need to secure your web apps NOW? Cenzic finds more, "real" vulnerabilities fast. Click to try it, buy it or download a solution FREE today! http://www.cenzic.com/downloads ------------------------------------------------------------------------
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | CanSecWest 2008 CFP (deadline Nov 30, conf Mar 26-28) and PacSec Dojo's, Dragos Ruiu |
|---|---|
| Next by Date: | What does a network having all identical MAC addresses mean?, Paul Greene |
| Previous by Thread: | CanSecWest 2008 CFP (deadline Nov 30, conf Mar 26-28) and PacSec Dojo's, Dragos Ruiu |
| Next by Thread: | What does a network having all identical MAC addresses mean?, Paul Greene |
| Indexes: | [Date] [Thread] [Top] [All Lists] |