Configure a GPRS dialer in Linux using wvdial / gnome-ppp

Accessing internet from linux pc using GPRS connectivity is easy in latest Linux distributions like ubuntu. Some of the Linux distributions are not integrated any of those dialers. Some days back i faild to dial out from my backtrack 5, that inspired me to find out the possibilities and write the possible solutions. I have [...]

[ More ] July 27th, 2011 | 1 Comment | Posted in Internet |

Secure file transfer from Windows to Linux using RSA key

PSCP is a command line application which is a free implementation  of scp for win 32 platform  . This tool is used for securely copying between computer systems. It uses the SSH (secure shell) protocol, which makes it impossible for other people on the network to snoop on your password or on the data you [...]

[ More ] April 1st, 2011 | Your thoughts are welcome | Posted in Security |

Root password recovery of Debian

If you don’t know the root password of Debian, how are you going to change it? You need to know a method of password recovery for the Debian Linux operating system. What this method does is reboot your machine into what is called “single user mode”. Single user mode is also referred to as maintenance [...]

[ More ] February 17th, 2011 | 2 Comments | Posted in Security |

Boot an ISO from Hard disk using GRUB 2

I was googling on how to boot an ISO in hard disk/USB disk, so that I can avoid the hectic CD/DVD burning process to test my favorite GNU/Linux distribution, but sadly I couldn’t find any straight forward method  to achieve this. I am blessed to attend  ILUG-cochin (Indian Libre User Group) meeting on 4th Sunday [...]

[ More ] February 1st, 2011 | 5 Comments | Posted in Misc |

Redhat linux hardening tips & bash script

From the time a servers goes to live environment its prone to too many attacks from the hands of crackers (hackers) also as a system administrator you need to secure your Linux server to protect and save your data, intellectual property, and time here server hardening comes into effect. Securing a server is much different [...]

[ More ] January 18th, 2011 | 2 Comments | Posted in Security, Servers |

PfSense advanced configuration with SquidGuard and Lightsquid

Here i am explaining how to integrate SquidGuard and Lightsquid  in a pfsense Squid Server.  Earlier we have published an article about the how to setup a proxy with pfSense Firewall distribution. as we know SquidGuard is a URL redirector used to use blacklists with the Squid. Squid can perform better with SquidGuard. LightSquid is [...]

[ More ] December 21st, 2010 | 3 Comments | Posted in Servers |

Prevent accidental reboots in Linux Servers

CTRL+ATL+DELETE will be the most commonly used shortcut key when we work on windows . Watch out that you never use this key (CTRL+ATL+DELETE) on linux server. The default Linux installation treats CTRL+ATL+DELETE command to immediately reboot the Linux system without any warning signals. To avoid this to happen we need to edit  the inittab [...]

[ More ] December 6th, 2010 | Your thoughts are welcome | Posted in Security |

Disabling runlevel system services on Linux Servers

When Linux server boots up a large amount of services keeps running in its background . Some services are essential to the operation of your server, while other services are considered non-essential and will cause no problems to your server by disabling them.  Some services takes a lot of time and may affect the working [...]

[ More ] December 1st, 2010 | Your thoughts are welcome | Posted in Security |

Securing SSH in Linux Servers

SSH security has to be taken care when Linux server is up and running. Most administrators tend to install an SSH server and leave it at its default settings, typically to allow password authentication and root logins . There are few parameters in /etc/ssh/sshd_config which can be changed to securing SSH. Open /etc/ssh/sshd_config and add [...]

[ More ] November 26th, 2010 | Your thoughts are welcome | Posted in Security |

Connectbot SSH client for android

ConnectBot is an open sourse Secure Shell client for the Android platform. Using this SSH client you can manage your SSH enabled servers / devices. You can monitor utilization, restart services, analyze logs etc .It can also use as a secure file transfer application. ConnectBot is must tool for system administrators and webmasters who manage [...]

[ More ] November 22nd, 2010 | Your thoughts are welcome | Posted in Mobile |