http://www.cyberciti.biz/tips This is a Linux sys admin journal by Vivek about sys admin work, Linux tips & tricks, hacks, news and more. Fri, 03 Feb 2012 22:45:35 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://www.cyberciti.biz/tips/linux-unix-bsd-mac-filtering.html http://www.cyberciti.biz/tips/linux-unix-bsd-mac-filtering.html#comments Tue, 17 Feb 2009 18:37:21 +0000 Vivek Gite http://www.cyberciti.biz/tips/?p=4452 MAC Filtering (layer 2 address filtering) refers to a security access control methodology whereby the 48-bit address assigned to each network card is used to determine access to the network. Iptables, pf, and IPFW can block a certain MAC address on a network, just like an IP. One can deny or allow from MAC address like 00:1e:2a:47:42:8d using open source firewalls. MAC address filtering is often used to secure LAN or wireless network / devices. Is this technique effective? ]]> http://www.cyberciti.biz/tips/linux-unix-bsd-mac-filtering.html/feed 14 http://www.cyberciti.biz/tips/ping-tunnel-ping-proxy.html http://www.cyberciti.biz/tips/ping-tunnel-ping-proxy.html#comments Mon, 17 Dec 2007 13:30:07 +0000 Vivek Gite http://www.cyberciti.biz/tips/ping-tunnel-ping-proxy.html http://www.cyberciti.biz/tips/ping-tunnel-ping-proxy.html/feed 1 http://www.cyberciti.biz/tips/perform-simple-manipulation-of-ip-addresse.html http://www.cyberciti.biz/tips/perform-simple-manipulation-of-ip-addresse.html#comments Mon, 19 Nov 2007 08:01:48 +0000 Vivek Gite http://www.cyberciti.biz/tips/perform-simple-manipulation-of-ip-addresse.html Multiple address and netmask input formats. => Retrieving of address information from interfaces. => Classfull and CIDR output. => Multiple address and netmask output formats (dotted quad, hex, number of [...]]]> http://www.cyberciti.biz/tips/perform-simple-manipulation-of-ip-addresse.html/feed 5 http://www.cyberciti.biz/tips/nixcraft-faq-roundup-11.html http://www.cyberciti.biz/tips/nixcraft-faq-roundup-11.html#comments Tue, 06 Feb 2007 18:22:09 +0000 Vivek Gite http://www.cyberciti.biz/tips/nixcraft-faq-roundup-11.html Shell command or script to write simple output on screen under Linux and UNIX => Delete a log files in Linux or UNIX => VSFTPD limit the number of simultaneous vsftpd connections for a single IP address => Gnome Desktop Keyboard Shortcut Keys => Disable Advanced power management [...]]]> http://www.cyberciti.biz/tips/nixcraft-faq-roundup-11.html/feed 0 http://www.cyberciti.biz/tips/lighttpd-restrict-or-deny-access-by-ip-address.html http://www.cyberciti.biz/tips/lighttpd-restrict-or-deny-access-by-ip-address.html#comments Tue, 12 Dec 2006 18:01:39 +0000 Vivek Gite http://www.cyberciti.biz/tips/lighttpd-restrict-or-deny-access-by-ip-address.html http://www.cyberciti.biz/tips/lighttpd-restrict-or-deny-access-by-ip-address.html/feed 13 http://www.cyberciti.biz/tips/linux-how-to-bind-qmail-to-specific-ip-address.html http://www.cyberciti.biz/tips/linux-how-to-bind-qmail-to-specific-ip-address.html#comments Sun, 05 Dec 2004 16:18:00 +0000 nixcraft http://www.cyberciti.biz/tips/linux-how-to-bind-qmail-to-specific-ip-address.html http://www.cyberciti.biz/tips/linux-how-to-bind-qmail-to-specific-ip-address.html/feed 6