How do I block particular IP addresses or host with the iptables command under Linux?
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servers
How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?
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I have installed FreeBSD 8.x on my Laptop with Windows 7 in dual boot mode. But I’m unable to connect to the LAN or Internet using Atheros AR8132 card. How do I configure this card under FreeBSD?
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I‘ve tons of images, css and javascript hosted at backend server IP 192.168.1.5 and 192.168.1.6. How do I make sure nginx reverse proxy load balancer always send all http_user_agent requests coming from “Mozilla” to server 192.168.1.5 and MSIE to server 192.168.1.6 only?
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BIND9 dynamic updates allow remote servers to add, delete, or modify any entries in my zone file. How do I disable dynamic updates under BIND 9 (named) for any zone?
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NFS was not designed with security in mind, and has a number of weaknesses, both in terms of the protocol itself and because any NFS installation must expose several daemons, running on both servers and clients, to network attack. I use my CentOS based server only to server web pages and nothing else. How do I disable NFS services under RHEL / CentOS / Fedora Linux?
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