WhatsMyIP.org Security / Server Port Test

Port	Status	Service	Description
21	Closed	ftp	Port 21 is used for FTP Servers. The File Transfer Protocol is a fairly obsolete and insecure way to transfer files.
22	Open	ssh	Port 22 is used for SSH, a Remote Login Protocol for Unix based machines. If you do not use SSH and Port 22 is open, this is something to look into.
25	Closed	smtp	Port 25 is used for Mail Servers. If you are not running a Mail Server this port should be closed.
53	Closed	DNS	Port 53 is used for Domain Name Servers.
80	Closed	http	Port 80 is the port Web Servers run on. If you are not running a Web Server and your port 80 is open, this is something to look into.
110	Closed	pop3	POP3 (aka POP) is the most common protocol for checking email on a mail server. Most ISP's use pop.
137	Closed	netbios	These three ports are all used for Windows File Sharing over the internet. Most Internet Service Providers block these ports for security so generally you don't have to worry about them. You couldn't open them if you tried.
138	Closed	netbios
139	Closed	netbios
143	Closed	imap	IMAP is one of the two most common protocols used to check email.
443	Closed	https	Port 443 is for Web Servers running over SSL. This encrypts all the data so no one can listen in and steal data.
548	Closed	afp	Port 548 is used for the Apple File Sharing protocol. It allows you to connect to your Macintosh over the internet.
587	Closed	smtp submission	Port 587 is the preferred port for smtp submission (client to server submission). Most systems still use 25 for this. Often 587 is used as the SSL port.
993	Closed	imap ssl	The IMAP mail protocol, used over SSL to encrypt the data transfer (and protect your password etc)
995	Closed	pop ssl	The POP mail protocol, used over SSL to encrypt the data transfer (and protect your password etc)
1433	Closed	mssql	Port 1433 is used by Microsoft's SQL Server. Unless you know you are running MSSQL (Not MySQL), its very important to block this port. It is very vulnerable.
1701	Closed	l2tp	Layer-2 Tunneling Protocol. Used with IPSec to create a secure form of VPN.
1723	Closed	pptp	Point-to-Point Tunneling Protocol. A different form of VPN. Its not as good as IPSec, and MS's PPTP server has MAJOR flaws.
3306	Closed	MySQL	Port 3306 is used by MySQL. Not to be confused with Microsoft's SQL, MySQL if a free, open source, very powerful and very secure Database Server. This site is powered in part by MySQL.
5432	Closed	PgSQL	PostgreSQL. An Open source SQL server, like MySQL, but different. Some people Love PgSQL, some Love MySQL.

Obama '08