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Information for Linux System Administration 

Smbind: Web management for DNS

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Manage your DNS server and tables from a web browser with Simple Managment for BIND (Smbind)...
Smbind is a PHP-based software tool for managing DNS zones for BIND via the web interface. This supports the per-user administration of zones, error checking, and a PEAR DB database backend.
read more...
permapage | score:9045 | -Ray, April 26, 2007

PDNSD HowTo: A DNS Caching Personal Server

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PDNSD is a non authoritative caching DNS server. It maintains a disk cache of the queries that your system performs and subsequent queries will be faster from the cache. It is safe enough to be used on a personal Unix/Linux system as a home Desktop or a Laptop. read more...
permapage | score:8982 | -falko, December 16, 2011

Install PowerDNS and Poweradmin on Ubuntu 8.10

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This article shows how you can install the PowerDNS nameserver (with MySQL backend) and the Poweradmin control panel for PowerDNS on an Ubuntu 8.10 system. PowerDNS is a high-performance, authoritative-only nameserver - in the setup described here it will read the DNS records from a MySQL database (similar to MyDNS), although other backends such as PostgreSQL are supported as well. Poweradmin is a web-based control panel for PowerDNS. read more...
permapage | score:8904 | -falko, January 30, 2009

Install PowerDNS, MySQL and Poweradmin on Ubuntu 9.10

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This article shows how you can install the PowerDNS nameserver (with MySQL backend) and the Poweradmin control panel for PowerDNS on an Ubuntu 9.10 system. PowerDNS is a high-performance, authoritative-only nameserver - in the setup described here it will read the DNS records from a MySQL database (similar to MyDNS), although other backends such as PostgreSQL are supported as well. Poweradmin is a web-based control panel for PowerDNS. read more...
permapage | score:8897 | -falko, April 16, 2010

Tutorial: DHCP Server and Dynamic DNS with BIND in Debian

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This tutorial will explain Howto setup DHCP Server and Dynamic DNS with BIND in Debian.
First you need to install DHCP, BIND servers using the following command:

#aptitude install dhcp3-server bind9

This will complete the installation.

This is the network configuration of our DHCP/DNS server we are using for our tutorial...
read more...
permapage | score:8813 | -gg234, July 29, 2008

Configure DNSSEC on BIND9 on Debian 6, Ubuntu 11.10

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This guide explains how you can configure DNSSEC on BIND9 on Debian Squeeze and Ubuntu 11.10. It covers how to enable DNSSEC on authoritative nameservers (master and slave) and on resolving nameservers, creation of keys (KSKs and ZSKs), signing of zones, key rolling with rollerd, zone file checking with donuts, creation of trust anchors, using DLV (DNSSEC look-aside validation), and getting your DS records into the parent's zone. read more...
permapage | score:8801 | -falko, April 19, 2012

Clean djbDNS DNS Server on CentOS: dnscache, tinydns

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What is djbDNS? And why do we use djbDNS? There is a new point of view to serve the dns service - each of the dns server functions is a separate service, like authority, cache, forward and so on. The other difference is the daemon-tools which will rapidly restart services to prevent zombies. read more...
permapage | score:8562 | -falko, August 6, 2010

MyDNSConfig 1.0: Manage DNS through a web interface

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MyDNSConfig is a free web-interface written in PHP that allows to administrate/create/delete DNS records easily. All data is stored in a MySQL database, and this MySQL database is used by the MyDNS name server to retrieve the DNS records which means: no zone files, no server reloads.

The software lets you manage the following record types:
  • A records
  • ALIAS records
  • CNAME records
  • HINFO records
  • MX records
  • NS records
  • PTR records (for reverse lookups)
  • RP records
  • SRV records
  • TXT records (and therefore also SPF records)
MyDNSConfig has just been initially released in version 1.0.0 under a BSD license and is maintained by the ISPConfig (http://www.ispconfig.org) development team.

The release of the software is accompanied by a HowtoForge tutorial that describes how to install and configure the MyDNS nameserver and MyDNSConfig: http://www.howtoforge.com/mydns_name_server

MyDNSConfig can be downloaded from http://www.mydnsconfig.org. read more...
mail this link | permapage | score:8480 | -falko, February 6, 2006

Tutorial: A MySQL based DNS Server: MyDNS

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In this tutorial I will describe how to install and configure MyDNS, a DNS server that uses a MySQL database as backend instead of configuration files like, for example, Bind or djbdns. This has the advantage that you can easily use web-based frontends to administrate your DNS records. You could even write your own frontend, e.g. using PHP, to interact with the MyDNS database. MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted! This is a major advantage.

I will also show how to set up a secondary DNS server, but I will not use normal zone transfers to get the records from the primary to the secondary DNS server; instead, I will use MySQL database replication. I will simply replicate the data from the primary to the secondary server.

There are multiple web frontends to MyDNS. Of course, you can use phpMyAdmin for the MyDNS administration, or you can use the web frontend that comes with MyDNS (which is not for beginners because it lacks the field descriptions), or you can use MyDNSConfig, a tool written by myself. I will show how to install each of them. read more...
mail this link | permapage | score:8456 | -falko, January 23, 2006

Dynamic DNS on Linux

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Need to connect remotely to your Linux system -- but you don't have a static IP address?
The solution is to choose your own hostname for your PC, set up a record for it with a dynamic DNS service provider, and set up your PC to check its own IP address regularly and send an update message to the dynamic DNS server when it changes. Then you can SSH to myhost.unclenatesdomain.org and be assured it will reach your PC.

Choosing which dynamic DNS provider to go with can be as confusing as picking a Web hosting provider...
read more...
mail this link | permapage | score:8302 | -Ray, July 20, 2006

Tutorial: Setting Up A DNS Server

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An introduction to the Domain Name Service and how to use it..
There are a couple of ``gotchas'' that normally are avoided with name lookups that are often seen when setting up reverse zones. Before you go on you need reverse lookups of your machines working on your own nameserver. If it isn't go back and fix it before continuing.

I will discuss two failures of reverse lookups as seen from outside your network...
read more...
permapage | score:8279 | -Ray, May 11, 2001 (Updated: September 8, 2004)

Tutorial: Build a Web, Email, DNS, MySQL Database Cluster server on Debian 6.0

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This tutorial describes the installation of a clustered web, email, database and DNS server to be used for redundancy, high availability and load balancing on Debian 6 with the ISPConfig 3 control panel. MySQL Master/Master replication will be used to replicate the MySQL client databases between the servers and Unison will be used to Sync the /var/www (websites) and /var/vmail (email account data) folders. read more...
permapage | score:8265 | -falko, February 16, 2012

Install PowerDNS, MySQL, Poweradmin on Debian

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This article shows how you can install the PowerDNS nameserver (with MySQL backend) and the Poweradmin control panel for PowerDNS on a Debian Lenny system. PowerDNS is a high-performance, authoritative-only nameserver - in the setup described here it will read the DNS records from a MySQL database (similar to MyDNS), although other backends such as PostgreSQL are supported as well. Poweradmin is a web-based control panel for PowerDNS. read more...
permapage | score:8163 | -falko, July 17, 2010

Set up Caching DNS with djbdns on FreeBSD

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Building a local DNS cache will speed up your internet connection since the time for the translation job (converting domain names into IP addresses) will become negligible with the assumption that the DNS cache gets the information from the parent DNS. read more...
permapage | score:8154 | -falko, May 8, 2007

Tutorial: Install MyDNS-NG, MyDNSConfig on Debian

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This tutorial will describe how to install and configure MyDNS-NG and MyDNSConfig 3 on Debian Squeeze. MyDNS-NG is a DNS server that uses a MySQL database as backend instead of configuration files. The advantage is that MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted. A secondary nameserver can be easily set up by installing a second instance of MyDNS that accesses the same database or, to be more redundant, uses the MySQL master / slave replication features to replicate the data to the secondary nameserver. read more...
mail this link | permapage | score:8131 | -falko, January 20, 2011

dnstop: Monitor DNS Server Network Traffic In Real Time

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dnstop is a great tool when maintaining a DNS server. Log file can give out required information but dnstop is just like top command for monitoring dns traffic. It is a small tool to listen on device or to parse the file savefile and collect and print statistics on the local network's DNS traffic. You can see information about all DNS clients, DNS queries and much more with this tool. read more...
permapage | score:8126 | -nixcraft, August 4, 2008

Using the Domain Name Service (DNS)

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You know my name, look up my number...
...it's estimated that more than 50,000 new domain names are registered each day. The Domain Name Service (DNS, also often referred to as the Domain Name System) was created to help solve this problem. DNS is essentially a huge conga line of servers (called name servers) snaking through the Internet. For any computer connected to the Net, a given DNS server can provide you with that computer's host name and IP address information itself, or the server knows how to find other name servers that will have that information.

In this story we give a general overview of the DNS system, how it's implemented on Linux, and how to configure it. We describe the files that hold the configuration information and host database and where they're located. Sample configuration files are also included to get you started with your own DNS setup.
read more...
mail this link | permapage | score:8111 | -Ray, December 5, 2000 (Updated: August 27, 2003)

Tutorial: Install a Bind9 Master / Slave DNS System

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In this tutorial two Bind DNS servers will be installed, one as the master and the other as a slave server. For security reasons Bind9 will be chrooted in its own jail. Using two servers for a domain is a commonly used setup and in order to host your own domain you are required to have at least two domain servers. If one breaks, the other can continue to serve your domain. read more...
permapage | score:8075 | -falko, August 28, 2006

Linux DNS Tutorial

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This tutorial describes the basics of the Domain Name System (DNS) that Linux system administrators should know of. Front-ends and quick templates to set up domain records have a place in managing sites, but when confronted with DNS configurations already in existence, nothing can substitute for knowing and using the fundamentals. read more...
permapage | score:8068 | -falko, April 10, 2006

Security: Understanding DNS Attacks

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Minimizing the vulnerabilities of the Domain Name System...
Understanding the mechanics behind DNS is important when securing your DNS server. DNS is robust and full featured; understanding what resources each DNS action requires will allow administrators to disable unnecessary features, therefore achieving a minimalist and secure DNS server. This section reviews the basics of DNS mechanics. Domain name information is stored in flat text files called zone files. User requests and server replies are simple text-file searches and take very few system resources. Some newer DNS technologies allow for write access to update record data and other configurations remotely. However, unless write access is explicitly enabled, from an end user perspective DNS should be referred to as a read-only service. DNS is mechanically broken up into records, servers, and their respective chains of authority from the root servers...
read more...
mail this link | permapage | score:8068 | -Ray, May 17, 2004
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Closed Source Linux Distribution Launched

VPS: Xen vs. OpenVZ

Mono-culture and the .NETwork effect

The life cycle of a programmer

Scripting: A parallel Linux backup script

The Real Microsoft Monopoly

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Linux vs. Windows: Why Linux will win

Linux dominates Windows

Space Tyrant: Multithreading lessons learned on SMP hardware

Space Tyrant: A threaded C game project: First Code

Apple to Intel move no threat to Linux

Microsoft to push unlicensed users to Linux

Shadow.sh: A simple directory shadowing script for Linux

The Network Computer: An opportunity for Linux

MiniLesson: An introduction to Linux in ten commands

Space Tyrant: A threaded game server project in C

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Why Programmers are not Software Engineers

Apple DIY Repair

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No, RMS, Linux is not GNU/Linux

Hacker Haiku

Download: Linux 3D Client for Starship Traders

Testing the Digital Ocean $5 Cloud Servers with an MMORPG

Missing the point of the Mac Mini

Tutorial: Introduction to Linux files

 

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