Thank you for your reply . But still it cannot get through : " #nmap -sS -p 20-80 172.18.0.1 Starting nmap V. 3.00 ( www.insecure.org/nmap/ ) Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 Nmap run completed -- 1 IP address (0 hosts up) scanned in 91 seconds " Can you please help me . On Tue, Sep 29, 2009 at 10:40 AM, Bastian Ballmann <bb at patronas.de> wrote: > Hi, > > turn off your firewall? Than nmap shows open instead of filtered ;) > > greets > > basti > > hadi motamedi schrieb: > > Dear All > > Can you please do me favor and let me know how can I solve my problem > > with nmap , as described below : > > "My CentOS server can ping the network element , but when I try to > > scan its open ports to see which ones are open at now the nmap cannot > > distinguish them and returned as they are being filtered : > > #nmap -sS -p 20-80 172.18.0.1 > > Can you please let me know how can I modify my nmap command to get > > through ? > > Thank you in advance > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > -- > Bastian Ballmann > > PATRONAS Financial Systems GmbH > Schnewlinstr 4 > 79098 Freiburg > > fon +49 (0)761 400688-19 > fax +49 (0)761 400688-50 > > ballmann at patronas.de > http://www.patronas.de > > Amtsgericht Freiburg, HRB 7212 > Geschäftsführung: Heribert Steuer, Carsten Osswald > > This e-mail may contain confidential and/or privileged information. If you > are not the intended recipient (or have received this e-mail in error) > please notify the sender immediately and destroy this e-mail. Any > unauthorized copying, disclosure or distribution of the material in this > e-mail is strictly forbidden. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20090929/24f9df16/attachment-0004.html>