Many applications do not directly support the use of socks proxy. Torsocks enables such applications to use the tor socks proxy. Shell wrapper to simplify the use of the torsocks library to transparently allow an application to use a SOCKS proxy. Torsocks gets installed along with the tor package on ubuntu for example $ sudo… Read More »
In a previous article we saw how a windows netbook/laptop can be used to share a tata photon connection with other computers on a LAN. Now we shall do the same thing on Ubuntu. The technique is very simple and uses a tool called firestarter. Internet connection sharing can be setup on linux by adding… Read More »
Wired Network Lets say you have an existing wired network setup at your workstation or home somewhat like this Adsl Modem/Router (192.168.1.1) => Switch => Multiple Pcs (192.168.1.10, 192.168.1.20 …) Now you want to add a wireless access point to this existing wired network so that you can connect to the internet wirelessly from your… Read More »
Tcpdump Tcpdump is a commandline network analyzer tool or more technically a packet sniffer. It can be thought of as the commandline version of wireshark (only to a certain extent, since wireshark is much more powerful and capable). As a commandline tool tcpdump is quite powerful for network analysis as filter expressions can be passed… Read More »
The standard telnet utilities that ship with linux or windows allow to telnet to services running on TCP ports. They do not support udp ports. However the utility netcat can be used for working with udp ports in a very similar manner to default telnet utility. The telnet utility works like this $ telnet localhost… Read More »
The speed of your internet browsing depends on the dns servers to a certain extent. Whenever a url is opened in the browser, the browser has to first perform a dns request to get the ip address of that particular url’s domain name. For example www.google.com. It is only after the ip address is found,… Read More »
Port forwarding is a configuration in the router of a LAN such that any connections to a specific port number on the public/wan ip of the router may be forwarded to a specific machine/ip inside the LAN. Most routers allow configuration options to set port forwarding. After setting up port forwarding its necessary to check… Read More »
PHP Handlers PHP handlers are a link between a webserver(say Apache) and the PHP libraries. PHP handlers enable a webserver to load the PHP library in a certain manner and execute the PHP code and return the output to the webserver. There are many different kind of PHP handler setups available. Each has its own… Read More »
Monitor the network bandwidth used by each process with nethogs command on Linux
Firestarter is an easy to install firewall application for Ubuntu which also has to the option to enable Internet Connection Sharing at the click of a mouse. Install firestarter $ sudo apt-get install firestarter Launch the application firestarter. The wizard will come up on the first run. Enable Internet Connection Sharing in the wizard, and… Read More »