Networking | Planet Admon

Using VETH instead of VENET in OpenVZ

Posted by joseph on April 8, 2010 · 0 Comment

By default OpenVZ is using VENET as network device. It does packet switching based on IP header, which makes it look like a point-to-point connection between VPS and the physical host. An alternative device is Virtual Ethernet device (a.k.a. VETH).

Filed in: Networking, System Tuning, Virtualization

Failover Firewalls with OpenBSD and CARP

Posted by joseph on December 30, 2009 · 0 Comment

Warning – this post was original created by Jason Dixon some yrs ago, its copyright is fully held by samag.com. I copied it here for a track record, If there’s any issue, please let me know. As the pictures in this post had lost already, it’s suggested to check its PDF version here. Firewalls [...]

Filed in: Networking, System Tuning

Set timezone date and time in Linux

Posted by joseph on December 13, 2009 · 0 Comment

Your computer has two timepieces; a battery-backed one that is always running (a.k.a. the hardware, BIOS, or CMOS clock), and another that is maintained by the operating system currently running, it’s called system clock. This document explains how to set your system clock, your timezone, and other [...]

Filed in: Networking, System Tuning

Postfix: Manage transport mapping table

Posted by joseph on December 9, 2009 · 0 Comment

I have some web servers running for productive purpose, and they all have to send out mails. So a problem comes, how can I config mail forwardings for these servers with only internal network to send out mails to the public network? Luckily it’s easy to implement with the help of either sendmail [...]

Filed in: Networking, System Tuning

13th Workshop on High Performance Transaction Systems

Posted by joseph on November 25, 2009 · 0 Comment

The 13th international workshop on HPTS held at October 25-28, 2009, Pacific Grove, CA. It’s all about real systems problems for real systems builders! The papers are listed at its official website. These papers are really really very informative, it’s suggested to have a read! Every two [...]

Filed in: Databases, Networking, System Tuning

What network issues should be monitored?

Posted by joseph on September 11, 2009 · 0 Comment

Network is the basis of the communication to your customers, page viewers. without network, computers are of no usage at all, arent they? But most of the guys always pay very little attention to the health of their networks. Generally, there are some type of networks issues should special pay attention:

Filed in: Networking, System Tuning

Common wget usage examples

Posted by joseph on September 8, 2009 · 0 Comment

Wget is one of my favorite tools in Linux/Unix world. Sometimes, you want to download all the rpm, deb, iso, or tgz files and save them into a directory. Sometimes you need to use it to check your web server status. Here are some of my favorite wget usage examples: $ wget -i filename.txt Put the URLs [...]

Filed in: Applications, Networking

Setup OpenVPN in one minute

Posted by joseph on September 8, 2009 · 0 Comment

This article will guide you on creating a client-2-server OpenVPN instance. Our goal is to redirect all client traffic to VPN server. That means VPN server would serve as a gateway for local traffic. It’s useful to bypass some STUPID National firewalls,or to test IP-restricted applications.

Filed in: Networking

Linux NFSv4 Overview, FAQ and HOWTO

Posted by joseph on September 8, 2009 · 0 Comment

This document provides an introduction to NFS as implemented in the Linux kernel. It links to developers’ sites, mailing list archives, and relevant RFCs, and provides guidance for quickly configuring and getting started with NFS on Linux.

Filed in: Networking

Howto use dig check PTR record

Posted by joseph on September 8, 2009 · 4 Comments

dig (as known as “domain internet groper”) is a utility that can talk directly to name servers in order to gather detailed domain name related information. DNS is used to resolve a host name or alias into IP address,so that your computer can find the resource you’re looking for. However, [...]

Filed in: Networking