Archive for the ‘Linux router’ Category

Smtp forwarding tool for PLC controllers and simple devices.

Nowadays thanks to email spammers, sending emails can be a nightmare if one wants to use own server. Very often our home or automation devices like video recorders, routers, cameras and PLC controllers are able to send email message using simple email protocol without fancy TLS/SSL encryption and sometimes even without authentication. These devices are […]

SSH login using pair of key with no password

In this paper I will present the easiest way to use key pair for loggin to ssh servers. Everything is done in linux operating system. On client computer we generate our public and private key: course. ssh-keygen -t rsa -b 4096 Now to use our key for logging we have to upload it to the […]

Gmail ipv6 no PTR record rejected emails.

If You get the following message on the ISPconfig server running postfix: „Our system has detected that this message does 550-5.7.1 not meet IPv6 sending guidelines regarding PTR records” Then i suggest following work-around: Go to /etc/postfix/ find line: smtp unix – – – – – smtp and change it to: smtp unix – – […]

Howto copy linux os to new hard drive with GPT partition table.

This method was tested on linux lubuntu. All debian like system schould do the same. Use gparted to create partitions on new hard drive. Remember to create first partition 100 MB in size fat32 (vfat) as type, and set boot flag to it! We assume that You have connected new hard drive to your working […]

Howto make power led not blinking in sleep mode.

Hi, recently I have bought asrock H97 chipset motherboard. What is strange for me manufacturer has changed default power led behaviour. I have good night led option: enabled/auto – power led is off – equal to unplugging led disabled – power led is on when pc is on, led is blinking when in sleep mode […]

Howto autostart and shutdown virtualbox machines gracefully with host shutdown – Lubuntu

Hi, recently I have encountered problem how to shutdown virtual machines when host machine I shutting down. There are many script solutions out there, but the simplest is to use Lubuntu virtualbox package. Then in /etc/default/virtualbox You have to add these to lines at the bottom of the file: SHUTDOWN_USERS=”user names separated by space” SHUTDOWN=”savestate” […]

High performance Linux router with optional LMS web panel and radius server in 5 minutes.

High performance Linux router with optional LMS web panel and radius server in 5 minutes. Every network administrator managing a pool of many routers, knows how important configuration repeatability is. For this reason I have presented how to install high performance router under Debian Linux OS with configuration done in an easily editable text files […]

How To Use UUID To Mount Partition in Linux

UUID benefits: System maps partitions correctly even if hard drive is re-attached to different disk controller. You system will always boot even if You add new hard drive, change sata port, etc. To list UUID use command: blkid Then You can use UUID number in fstab: UUID=0f75c223-cb58-4586-a3cz-aad0c3f4f80f / ext3 errors=remount-ro 0 1 UUID=05e1cdb9-7818-4e26-bbd4-9601ecdffcdc none swap […]

Debian 6 linux installation in 26 figures for beginners.

In this article it is described how to install Linux Debian 6 on the computer equipped in one hard drive in the most simple configuration. We boot computer from a netinstall.iso cd. Make sure that computer is properly connected to the router with dhcp server running, so installer can access Internet to download updates and […]

Cure for VMware „STOP: 0x0000007B” error

A problem has been detected and windows has been shut down to prevent damage to your computer. If this is the first time you’ve seen this stop error screen, restart your computer. If this screen appears again, follow these steps: Check for viruses on your computer. Remove any newly installed hard drivers or hard drive […]