dns caching

HOWTO: Persistent DNS Caching with pdnsd.

location: ubuntuforums.com - date: January 5, 2007
A common complaint on the Ubuntu forums (and many other Linux sites, it seems) is the slow DNS look-up performance, especially compared with the same hardware running Windows. One way of improving performance is to provide DNS caching on the local machine, so that repeated look-ups are quicker -- a local request rather than a trip out to the Internet and back. Although some client programs do this for themselves (notably web browsers), many don't (notably mail clients, it seems to me). This being Linux, there are many ways to achieve local DNS caching, of course, ranging from the simple to the complicated. I have looked at several methods and this is the one that suits my needs. I'm running a desktop installation on a small home network and the machine is rebooted daily. This means that I need a solution that remembers its cache after a reboot -- I don't want to have to cache everything every morning. This requirement for persistence let me to pdnsd (p for persistent ), but

Setting up a Firewall, Gateway, DHCP Server, Proxy Server, DNS Caching Server

location: ubuntuforums.com - date: December 9, 2008
The purpose of this post is to provide a “How To” guide for assembling and configuring a Firewall, Gateway, DHCP Server, Proxy Server, DNS Caching Server in Ubuntu 8.10 ”Intrepid” Here is the hardware we chose for our machine: Intel D945GCL2 motherboard with integrated LAN, video and processor(http://www.intel.com/Products/Deskto...2-overview.htm) 10/100/1000 PCI network card 2 gigabyte stick of so-dim RAM 750 gigabyte SATA hard drive DVD writer/ reader Apex MI-100 mini-itx case(http://www.apextechusa.com/products.asp?pID=115) Once the hardware was installed in the computer case we proceeded to install Ubuntu 8.10 "Intrepid" using a live CD. At this point a decision needs to be made as to whether the entire hard drive is going to be used for the file system or if only a part of it will be used. If only part of the hard drive will be used, a possible option is to use the extra space as a recovery partition for the device using the g parted applicatio

DNS Caching?

location: ubuntuforums.com - date: July 16, 2012
My network is not very fast (6Mbps) and is pretty overloaded most of the time. It often takes ten or fifteen minutes to get a particular web page loaded. Not all the time, sometimes things run pretty well and it only takes a minute or two, but trying to connect with my bank in the U.S. in the early afternoon is terribly frustrating, and my comics page often has problems. A big part of the problem is DNS lookup. I hate watching the status bar in Firefox: "looking up gocomics.com" (35 sec) "connecting to gocomics.com" (1sec) "looking up googleads.com" (45 sec) "looking up gocomics.com" (2 min) "connecting to gocomics.com" (5sec) "looking up gocomics.com" (40 sec)... Back in the 1990s I remember seeing articles about setting up caching nameservers to solve this problem, which was very common then. I want to do that, but I really don't want to set up BIND9. I had some experience with BIND4 or 5, and it wasn't fun. I can do it i

DNS caching in linux

location: linuxexchange.com - date: June 13, 2012
I am confused about dns caching. I am writing a small forward proxy server and want to use OS dns cache on linux system. If I understand correctly then there is dns caching at the browser level.Then there is dns caching at OS level (Windows has it. I am not sure if linux distros have it by default). So, how does a browser/proxy_server use OS dns caching? I am trying to find if I can rely on linux for dns caching instead of doing it on my own inside my proxy. Thanks

HOWTO: Persistent DNS Caching with pdnsd.

location: ubuntuforums.com - date: January 5, 2007
A common complaint on the Ubuntu forums (and many other Linux sites, it seems) is the slow DNS look-up performance, especially compared with the same hardware running Windows. One way of improving performance is to provide DNS caching on the local machine, so that repeated look-ups are quicker -- a local request rather than a trip out to the Internet and back. Although some client programs do this for themselves (notably web browsers), many don't (notably mail clients, it seems to me). This being Linux, there are many ways to achieve local DNS caching, of course, ranging from the simple to the complicated. I have looked at several methods and this is the one that suits my needs. I'm running a desktop installation on a small home network and the machine is rebooted daily. This means that I need a solution that remembers its cache after a reboot -- I don't want to have to cache everything every morning. This requirement for persistence let me to pdnsd (p for persistent ), but

DNS Caching?

location: ubuntuforums.com - date: July 16, 2012
My network is not very fast (6Mbps) and is pretty overloaded most of the time. It often takes ten or fifteen minutes to get a particular web page loaded. Not all the time, sometimes things run pretty well and it only takes a minute or two, but trying to connect with my bank in the U.S. in the early afternoon is terribly frustrating, and my comics page often has problems. A big part of the problem is DNS lookup. I hate watching the status bar in Firefox: "looking up gocomics.com" (35 sec) "connecting to gocomics.com" (1sec) "looking up googleads.com" (45 sec) "looking up gocomics.com" (2 min) "connecting to gocomics.com" (5sec) "looking up gocomics.com" (40 sec)... Back in the 1990s I remember seeing articles about setting up caching nameservers to solve this problem, which was very common then. I want to do that, but I really don't want to set up BIND9. I had some experience with BIND4 or 5, and it wasn't fun. I can do it i

Total Newbie to configue caching, forwarding DNS server using BIND

location: ubuntuforums.com - date: March 20, 2011
Hello community, As stated in the title, I'm a two-day-old newbie to Ubuntu and to Linux. I am almost ready to sit for ICND2 (CCNA) so I am familiar with Cisco IOS CLI, but this Linux stuff is confusing me. Two days ago I was thrust into a project: To get BIND running as a caching and forwarding DNS server. It must forward to servers at OpenDNS and/or Google. I must show evidence of it resolving a public FQDN (output from DIG is preferred). And I must provide the content of any configuration file I had to edit or create. I have found most of the major configurations needed to complete the assignment, however, I don't know the simplest of commands to connect the dots, so to speak. So far, the things I know that I don't know are: >how to uncomment in gedit >how to save a configuration so that I can come back to it after eating, walking the dogs, etc. >how to save the terminal session output to something like notepad To elaborate on my ignorance of Linux, I don't understand

Caching DNS server error (lame server resolving)

location: linuxquestions.com - date: February 23, 2005
Slackware 10.1 I have been trying to get this DNS server up and running for a few days now, but I keep getting these "lame server resolving" errors. I have tried to use the prepackaged caching-nameserver-example that comes with Slackware, but it didn't work. I have tried the TLDP's DNS Howto for the Caching DNS setup, but, again, no luck. I have been examining my log an have noticed this error whenever I try to do a lookup: Code:

[SOLVED] [SOLVED] How to create a caching dns server in centos

location: linuxquestions.com - date: January 2, 2013
Hello all, I would like to setup a caching dns server on my existing Linux server, ( Centos 6.3) in order to increase the speed of browsing websites for the rest of the network. Can please someone help me with that? Where should I start? Thank you in advance! Cheers, Leo

Moving from CentOS 5.7 to Ubuntu 10.04 for LAMP, DNS, Murmur, Minecraft server

location: ubuntuforums.com - date: September 30, 2011
I've been using CentOS 5.X as a LAMP server for a few years now. I've been considering switching to Ubuntu 10.04 because it seems to have more packages that I use than CentOS does. I'm at the stage where everything I know about running the server is from writing down things I've learned from scouring the net when a problem comes up. I've done things like enable test repos and built programs from source to get things running (like murmur and ICE) when I know ubuntu already has packages available. I've been wondering how much of a security or stability risk my CentOS server is now. For this reason I've been thinking the smart thing to do may be to swap to using Ubuntu and just learn the differences between the two OS's. I'd like to know what others' opinions are on this.