Important communication ports

On any dedicated server or computer system you have number of ports which are used for communicating with other computer over a network. Each port have its specific function and is unique. You have Port numbers ranging from 0 to 65535. Ports 0 to 1024 are reserved which are used for certain privileged services. Such as you have port 80 which is defined for HTTP service as a default, you don’t have to specify this port number while accessing any domain name or url.

80 WebServer Port 80
When a user types in your IP address or Host Name in the browser, the browser will search for the IP address on port 80 by default for the web pages.

81  WebServer Alternate Port 81
Whenever a user types in your IP address or Host Name in the browser, the browser will look at the IP address on port 80 which is default port and if this Port is blocked, port 81 is used as an alternate port for hosting a website.

21  FTP Server Port 21 
When someone try to connect to your FTP Server, the FTP client will try to establish  connection on Port 21 by default. Thus Port 21 must be open for standard FTP clients to log in and connect to your server.

22 
SSH Secure Shell Port 22
If you want to run a SSH Secure Shell then you should keep open port 22 as this port is required for the SSH Client to connect to your server.

23  Telnet Server Port 23
If you run a Telnet server, this port is required for the Telnet Client so that they can connect to your server. In order to use telnet for remote admin and login, port 23 must be open.

25   SMTP Server Port 25
When someone sends a mail message to your SMTP Server, the mail will attempt to come in to your server on Port 25. This is the standard SMTP (Simple Mail Transport protocol) port.

2525  SMTP Alternate Server Port 2525
When someone sends a mail message to your SMTP Server, the mail will attempt to come in to your server on Port 25. Port 2525 is an alternate port used by TZO for the Store and forward services. This is a non-standard port, but useful if the standard SMTP (Simple Mail Transport protocol) port is blocked

110  POP Server Port 110
When you run a mail server, users will typically log into that machine via POP3 (Post Office Protocol) or IMAP4 (Internet Message Access Protocol) to retrieve their mail. POP3 is the most popular protocol for accessing mailboxes.

119   News (NNTP) Server Port 119
When you run a News server, typically News Clients wanting to connect to your news server will connect on port 119. This port needs to be open to run your own news server.

3389   Remote Desktop port 3389
Port 3389 is used for Windows Remote Desktop. If you want to remotely connect to your computer for remote control, using the free XP Remote desktop requires port 3389 to be open.

389  LDAP Server Port 389
LDAP or Lightweight Directory Access Protocol is becoming popular for Directory access, or Name, Telephone, Address directories. For Example LDAP://LDAP.Bigfoot.Com is a LDAP directory server.

143   IMAP4 Server Port 143
IMAP4 or Internet Message Access Protocol is becoming more popular and is used to retrieve Internet Mail from a remote server. It is more disk intensive, since all messages are stored on the server, but it allows for easy online, offline and disconnected use.

443   Secure Sockets Layer (SSL) Server Port 443
When you run a secure server, SSL Clients wanting to connect to your Secure server will connect on port 443. This port needs to be open to run your own Secure Transaction server.

1503 &1720   Microsoft NetMeeting and VOIP Ports 1503 and 1720
MS NetMeeting and other VOIP allows you to host an Internet call or VideoConference with other NetMeeting or VOIP users. NetMeeting is a free product that can be found on the Microsoft Website at http://www.microsoft.com
5631  PCAnywhere Port 5631
When a PCAnywhere server is set up to receive remote requests, it listens on TCP port 5631. This allow you to run a PCAnywhere host and use the Internet to connect back and remotely control your PC.

5900  Virtual Network Computing (VNC) Port 5900
When you run an VNC server to remotely control your PC, it uses port 5900. VNC is very useful if you want to control your server remotely.

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This post was written by on November 26, 2008

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Blogging Tips

Blogging is growing at lightning speed and every other webmaster is looking for getting his blog famous, now you have setup your blog and want to update it so as to attract more visitors for your blog. As a blogger you should try to add new content every day, some blog lover try to update it very frequently even try to add new content more then once a day so that his blog will have latest content and that would boost traffic for his blog. It all depends on you, how you can manage your blog and how much you LOVE it.
bloggg Blogging TipsIf you are full time blogger and just love blogging then it would not take much time for you to add content for your blog else you can update your blog as you get free time. While writing blog content you should not have any other worries or workload before you this may affect your writing skill which will adversely affect your content. So prepare yourself before you start for blogging. Its always better to write about the filed/industry you have good knowledge and is of your interest else you cant create readable attractive content for your blog, you may have to spend time on research for writing an irrelevant content for your blog. You should come up with different idea of interest for your blog so that you can have enough readable material on your blog for catching attention of your blog visitor. You should try to update your blog with unique post frequently else your blog reader may distract from your blog, making blog reader to visit your blog again and again is very difficult task so make your blog attractive by having useful, interesting content, you can also embed few relevant graphics/images for creating attractive post. Pictures can explain more then words so try to add as many images as possible, don’t overload your blog with huge number of images else it may slowdown yoru blog loading time on poor internet connection. You can visit forums, message boards of your blog theme and can pick up latest happenings and can add them into your blog. Try to visit few social bookmarking sites such as StumbleUpon, Facebook, or Digg and get few blogging ideas. Technorati.com is also a place for you to visit where you can get top popular searches, news stories, blogs, and topics which you can rewrite for your blog. You can also get latest information for your subject through TV shows, radios and talks shows try to get most out of it. You can even join few chat rooms where you can get your targeted audiences. Most important try to invite guest bloggers and get your blog huge popularity and at top position in search engines.

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This post was written by on November 6, 2008

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Playing with colors for your console window

You are fed up of black & white screen which you get for your command window on Microsoft Windows OS. Windows provides you a command using which you can simply change the color of console output. Thus you can change default WHITE color console output with Red, Green, Blue etc… you just have to fire a command at command prompt for required console color to be appear.
Just follow following steps :
•    Press Start
•    Click on Run
•    Type Cmd and press Enter.
•    Type Color 9 ( this will change the color of the console output to Blue. ) you have many such options for getting required color for your console.

win console color Playing with colors for your console window

General syntax : General syntax of COLOR command is : COLOR [attr] where attr specifies color attribute of console output.

You can use following attribute with Color command and can get your preferred color for your windows console.

Color command attributes :

windows console color Playing with colors for your console window

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This post was written by on October 26, 2008

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Hello world!

Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!

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This post was written by on February 24, 2008