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LDAP: Understand the Protocol and Work With Entries Last week we explained how LDAP directories work, without really explaining how to use them. This week we’ll show how LDAP queries work, after explaining how the protocol works. The LDAP protocol supports just a few fairly easy to understand operations. Knowing what’s available provides administrators with the ability to surmise how various applications are using LDAP, troubleshoot issues, and construct their own search queries and filters more effectively. |
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Free DNS Services Overview Free DNS for your client resolving needs: there is more than one game in town, now. DNS Advantage, a NeuStar, Inc service, has just come online. Should you think about switching away from OpenDNS? Should OpenDNS be worried? First, some background is in order. OpenDNS, which we wrote about back in June, is the leading provider of free DNS services. DNS services of this nature may be called client resolving, recursive DNS, and we've recently heard the confusing term, "external DNS." |
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LDAP Introduction
LDAP directory services are nearly ubiquitous these days. Every sysadmin should know how to work with directories, understand how they are constructed, and have a certain level of familiarity with the LDAP protocol itself. In this, part one of two, we will introduce LDAP and explain how entries and schemas work. Next week, the second part will cover the LDAP protocol, working with LDAP entries, and searching and storing data. |
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Increase Security With Proper Authentication Policies Infrastructure security is more than just firewalls and security patches. Most IT environments have some type of remote access. VPN, e-mail, and many other services expose your user accounts to the world. This article will focus on how to deal with user accounts of your current and former employees.
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Networking 101: Understand BGP The Border Gateway Protocol is the routing protocol of the Internet. The protocol itself isn’t too complex, but the concepts behind AS-based routing can be strange to newcomers. In this article we hope to provide a short overview of how BGP works, along with the problems it solves and causes. |
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Malware Ecosystem: Botnet Clients Botnets would not exist without software vulnerabilities; this we can all agree on. The true source of the problem, however, is far from decided. As was alluded to in the first part of this series, the actual blame does not completely lie with a single company's products. This installment will cover botnet motivations, client infection and survival methods, and why this problem would exist without Windows. |
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