Media Gateway Control Protocol (MGCP)â€”MGCP is a client-server call control protocol, built on centralized control architecture. All the dial plan information resides on a separate call agent. The call agent, which controls the ports on the gateway, performs call control. The gateway does media translation between the Public Switched Telephone Network (PSTN) and the VoIP [...]
Session Initiation Protocol (SIP)â€”SIP is an application-layer control (signaling) protocol that creates, modifies, and terminates sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences. SIP, as defined by the Internet Engineering Task Force (IETF), enables VoIP calls. SIP works with Session Description Protocol (SDP) for call signalling. [...]
This tip shows you some interesting ways to kill stubborn processes. Never let it be said that you can’t kill a process again! The first way is the old boring way that most people probably use. Use the command ps aux, look through the process list until you find the PID you want and issue the kill command. How tedious!
How do you edit the .htaccess file? Before you upload an .htaccess file to your server, make sure there is not already one there. Your host panel or perhaps a script you have uploaded may have already changed the htaccess for some reason so you donâ€™t want to overwrite it as doing so could change [...]
If you have a lot of files in a directory but there is no index file, your server will list all the files in that server. This can cause a lot of problems. For example, one of the most common directories which webmasters forget to hide is the images folder. This allows everyone to view all the images in their images folder. This isnâ€™t usually a major problem though you may have more important files in a directory, perhaps important documents or software.
Change the default application install path Change the default Win2000 install path A warmer welcome Tell Win2000 where to find the service pack files Remove Unwanted programs from Add/Remove Programs Open My Computer icon in Explorer view Keep the Print Spooler service from displaying dialog boxes Stop Print Job Logging in the Event Log Disable [...]
Before configuring, you must have development versions of the given packages installed. For example, for mcrypt support, you must install mcrypt-devel. In the list below, this applies to zlib-devel, libxml2-devel, mysql-devel, bzip2-devel, httpd-devel, and mhash-devel. Some configure options below didn’t require a development version. View configure options ./configure –help Many configure options allow an optional [...]
How to check Windows NT, 2000, and XP Computers (workstations and servers) for missing security fixes.
Hfnetchk.exe – Is a utility from Microsoft that checks Windows NT, 2000, and XP Computers (workstations and servers) for missing security fixes. Â It is a command line utility that is run from a command prompt. Â For a full description of Hfnetchk see the MS links below. Note: A company called Shavlik Technologies is the company [...]
1. How to know which ports are listening from your IP address? # nmap -sT -O your-ip-address 2. How to grep an exact match? # grep -w textfile.txt 3. How to reverse grep matches? # grep -v textfile.txt # 4. How to know which service name is what port? Assuming port 443 # cat testfile.txt [...]
1. How to you change file ownership and chown files recursively? # chown user:user folder -R 2. How to view queued mail in sendmail or postfix? # mailq 3. How to show which alternative binary program does your machine executes first? # alternatives –display program-name 4. How to create public/private rsa key pair? # ssh-keygen [...]
If you’ve just bought a new desktop or laptop, and the box says the box is powered by 2 processors, you can actually verify that. Here’s how to display the number of processor of your linux box. Simply issue as root # cat /proc/cpuinfo | grep processor Everything in linux is files. This command simply [...]
Issue these commands to get more details of your hardware memory. # cat /proc/meminfo # free -l Here’s what I have: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ MemTotal: 1034748 kB MemFree: 105860 kB Buffers: 162688 kB Cached: 132020 kB SwapCached: 18908 kB Active: 709068 kB Inactive: 160420 kB HighTotal: 130848 kB HighFree: 260 kB LowTotal: 903900 kB LowFree: 105600 kB [...]
Server SSH log files provides us information from simple system to critical system security message. Here are quick ways of doing it via CLI terminal. These examples could serve also as starting point to parse more search key strings not only from any ssh log files, but also to other daemon service log file such [...]
We all know that /dev/null acts like a black hole in the universe. Anything you throw at it would be totally gone forever. Any attempts to read or write from it result to nothing. This means any data written to this /dev/null is just discarded and gone. This also mean that any data reads from [...]
A very old tip and trick on blocking yahoo chat messenger from connecting to internet, as per request. Considering an approved management policies, there are several ways to block yahoo chat messenger from connecting to internet coming from inside your network, depending on what equipment and boxes you have on ground. If you happen to [...]