<?xml version="1.0" encoding="UTF-8"?> <rss
version="0.92"> <channel><title>Something New</title><link>http://d33z.com/learn</link> <description>Continuing Education through Self Motivation</description> <lastBuildDate>Thu, 04 Mar 2010 17:25:58 +0000</lastBuildDate> <docs>http://backend.userland.com/rss092</docs> <language>en</language> <item><title>opie keys: One-time Passwords In Everything</title> <description><![CDATA[OPIE is the initialism of "One time Passwords In Everything". Opie is a mature, Unix-like login and password package installed on the server and the client which makes untrusted networks safer against password-sniffing packet-analysis software like dSniff and safe against Shoulder surfing. It works by circumventing the delayed attack method because the same password is [...]]]></description><link>http://d33z.com/learn/2010/03/04/opie-keys-one-time-passwords-in-everything/</link> </item> <item><title>ipsec: Authentication Header (AH) and Encapsulating Security Payload (ESP)</title> <description><![CDATA[The IPsec suite is a framework of open standards. IPsec uses the following protocols to perform various functions:Internet key exchange (IKE and IKEv2) to set up a security association (SA) by handling negotiation of protocols and algorithms and to generate the encryption and authentication keys to be used by IPsec.Authentication Header (AH) to provide connectionless [...]]]></description><link>http://d33z.com/learn/2010/02/02/ipsec-authentication-header-ah-and-encapsulating-security-payload-esp/</link> </item> <item><title>Virtual Private Dialup Network (VPDN)</title> <description><![CDATA[A VPDN is a network that extends remote access to a private network using a shared infrastructure. VPDNs use Layer 2 tunnel technologies (L2F, L2TP, and PPTP) to extend the Layer 2 and higher parts of the network connection from a remote user across an ISP network to a private network. VPDNs are a cost [...]]]></description><link>http://d33z.com/learn/2010/01/22/virtual-private-dialup-network-vpdn/</link> </item> <item><title>l2tp: layer 2 tunneling protocol</title> <description><![CDATA[In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs). It does not provide any encryption or confidentiality by itself; it relies on an encryption protocol that it passes within the tunnel to provide privacy.[1]
Although L2TP acts like a Data Link Layer protocol in the OSI [...]]]></description><link>http://d33z.com/learn/2009/12/29/l2tp-layer-2-tunneling-protocol/</link> </item> <item><title>protocol overhead</title> <description><![CDATA[Additional Reading:
http://sd.wareonearth.com/~phil/net/overhead/
http://en.wikipedia.org/wiki/Protocol_overhead
]]></description><link>http://d33z.com/learn/2009/12/18/protocol-overhead/</link> </item> <item><title>Iptables : Remove an entry</title> <description><![CDATA[Sorry it's been a while.
You can either delete by number or by recreating the rule. "iptables -D
INPUT 3" will remove the 3rd (counting from 1) rule. Or "iptables -D
INPUT -s 65.75.152.40 -j DROP" will remove the corresponding entry
independent of location. The rules must match exactly though or you'll
get a "Bad rule" error.http://www.plug.org/pipermail/plug/2004-November/010606.html
http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/s1-iptables-options.html
http://netfilter.org/documentation/HOWTO/packet-filtering-HOWTO-7.html
]]></description><link>http://d33z.com/learn/2009/11/17/iptables-remove-an-entry/</link> </item> <item><title>xargs and find</title> <description><![CDATA[xargs is a command on Unix and most Unix-like operating systems. It is useful when one wants to pass a large number of arguments to a command. Until Linux kernel 2.6.23, arbitrarily long lists of parameters could not be passed to a command [1], so xargs will break the list of arguments into sublists small [...]]]></description><link>http://d33z.com/learn/2009/11/16/xargs-and-find/</link> </item> <item><title>tail -f multiple files</title> <description><![CDATA[Pass more than one filename to tail -f and it will follow each file and let you know when one changes.
daniel@mycomputer:~$ tail -f /var/log/dmesg /var/log/kern.log
==&#62; /var/log/dmesg &#60;==
[   14.951256] type=1505 audit(1256945274.318:9): operation="profile_load" name="/usr/sbin/tcpdump" name2="default" pid=2001
[   16.052417] e1000e 0000:00:19.0: irq 2300 for MSI/MSI-X
[   16.108300] e1000e 0000:00:19.0: irq 2300 for MSI/MSI-X
[   16.108533] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   [...]]]></description><link>http://d33z.com/learn/2009/11/03/tail-f-multiple-files/</link> </item> <item><title>Bash Numeric Comparison</title> <description><![CDATA[Do not use &#62; or &#60; when comparing numbers in BASH. It doesn't work. It tries to redirect output instead of performing the comparison. Use -lt or -gt instead.
Additional Reading:
http://fvue.nl/wiki/Bash:_Numeric_comparison
http://tldp.org/LDP/abs/html/
]]></description><link>http://d33z.com/learn/2009/11/02/bash-numeric-comparison/</link> </item> <item><title>policy based routing</title> <description><![CDATA[When a router receives a packet it normally decides where to forward it based on the destination address in the packet, which is then used to look up an entry in a routing table. However, in some cases, there may be a need to forward the packet based on other criteria. For example, a network [...]]]></description><link>http://d33z.com/learn/2009/11/01/policy-based-routing/</link> </item> </channel> </rss>
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