11 Systat(On some UNIX machines, creating a TCP connection to this port will dump the active processes and who launched them)
15 Netstat(A variant of systat)
25 STMP Mail(Mail server, you can access them via telnet)
53 DNS(Doman Name System, aka NameServer)
79 Finger(Port to finger someone through)
80 HTTP(HyperText Transfer Protocol, Hypertext is electronic text with cross-referenced links between collections of text)
110 POP3(Post Office Protocol, TCP)
113 Ident(used to identify the "owner" of a connection. Reveals a lot of information to hackers.)
139 NetBIOS(Windows File and Printer Sharing, This is the most dangerous port. All "File and Printer Sharing" on Windows runs over this port)
443 Secure HTTP(This is the default port used when you do credit card transactions with an e-commerce site)
1080 Socks(Most scans for port 1080 are actually looking for WinGate, a popular firewall/proxy for Windows)
12345 Netbus(A trojan horse used by newbees)
8080 Proxy(This is a common port that contains HTTP servers and proxies)
27374 SubSeven(A trojan horse used by newbees)
23 Telnet(you find the program telnet in C:/windows)
22 SSH(the default port for some pcAnywhere services. Note that there is not relationship with pcAnywhere and ssh.)
43 Whois(Whois, Nickname)
21 File Tranfer Protocol
