The standard telnet utilities that are present in linux or windows can connect to services running on TCP ports. They do not support udp ports. However the utility netcat can be used to connect and work with udp ports in the same way as the telnet command. The telnet command can connect to a host… 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 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 have configuration options to enable port forwarding. Testing Port Forwarding After setting up port… 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
In a previous article we saw how to . Now here we shall see how to perform a whois for an ip address from the terminal. Get your ip address from ipmango.com. I got this IP : 59.93.210.154 Little Theory The information about any ip or ip range is stored in the Regional Internet Registry…. Read More »
Whois is often used to find out the details of the owners or the registrants of a domain name. The details includes name, address, telephone number etc. Whenever a domain is registered by a user, the user has to fill out own details at the domain registrar. These details are fed into the whois system,… Read More »
Switches, Routers, Wires and speed As usual internet was fast on ubuntu as it used to be till I needed to plug more PCs into the adsl route lying nearby. After connecting all computers and the adsl router to a switch I noticed that on one of the PC (Ubuntu 8.04) internet became really slow…. Read More »