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Linux Firewall IPTABLES Block nmap scanning
This is a discussion on Linux Firewall IPTABLES Block nmap scanning within the Networking, Firewalls and Security forums, part of the Mastering Servers category; I want to know 2 things regarding to Linux iptables filtering. 1> How to restrict port scanning from any users ...
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22-09-2008, 03:23 PM
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Linux Firewall IPTABLES Block nmap scanning
I want to know 2 things regarding to Linux iptables filtering.
1> How to restrict port scanning from any users (like nmap etc very good port scanner). 2> I m facing some problem regarding to Remote FTP server login . How to make such kind of Iptables firewalling , so that local users can upload / download / login to remote FTP servers. Here remote FTP server's ip information is blocked and FTP default port is also changed . my Lan interface -> eth1 & Wan interface -> eth0 . Here How to access that remote FTP server through iptables firewall. I read in internet about IPTABLES Connection Tracking Module . But its totally unware to me . Please help me regarding above 2 matters. 
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24-09-2008, 11:51 PM
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Have you checked this link:
psad: Linux Detect And Block Port Scan Attacks In Real Time
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