Nmap Development mailing list archives
Re: sometimes, a scan shows filtered..
From: root <root () elxsi de>
Date: Sun, 18 Aug 2002 19:14:00 +0200 (CEST)
On Sat, 17 Aug 2002, Roeland Th. Jansen wrote: Hi, have a look at the nmap manpage: <quote> The result of running nmap is usually a list of interest- ing ports on the machine(s) being scanned (if any). Nmap always gives the port's "well known" service name (if any), number, state, and protocol. The state is either 'open', filteredtoday , or a unfilteredfriend . Open means that the target machine will accept() connections on that port. ==> Filtered means that a firewall, filter, or other network obstacle is covering the port and preventing nmap from determining whether the port is open. Unfiltered means that the port is known by nmap to be closed and no fireĀ” wall/filter seems to be interfering with nmap's attempts to determine this. Unfiltered ports are the common case and are only shown when most of the scanned ports are in the filtered state. Martin
of mine and I were experimenting against his windows machine and consecutive scans show consistently all the specified scan ports closed. but sometimes, I see a weird thing. instead of reporting the ports to be closed, it reports : 1214/tcp filtered kazaa 1503/tcp filtered imtc-mcs 1720/tcp filtered h323hostcall 1863/tcp filtered msnp which happen to be the four ports we were experimenting with. since it;'s closed, no problem but it struck me that it was filtered. why ? --------------------------------------------------------------------- For help using this (nmap-dev) mailing list, send a blank email to nmap-dev-help () insecure org . List run by ezmlm-idx (www.ezmlm.org).
--------------------------------- Paranoia heisst nur die Wirklichkeit realer zu sehen, als andere. Name : Martin Kluge email : martin () elxsi info Phone : +49 160 1530201 Projects: http://www.aa-security.de --------------------------------------------------------------------- For help using this (nmap-dev) mailing list, send a blank email to nmap-dev-help () insecure org . List run by ezmlm-idx (www.ezmlm.org).
Current thread:
- sometimes, a scan shows filtered.. Roeland Th. Jansen (Aug 16)
- Re: sometimes, a scan shows filtered.. root (Aug 18)
- Re: sometimes, a scan shows filtered.. Roeland Th. Jansen (Aug 29)
- Re: sometimes, a scan shows filtered.. root (Aug 18)