TCP/IP




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		COMMON TCP/IP SOCKET NUMBERS
SERVICE NAME	NUMBER	COMMENT
FTP	21	FILE TRANSFER PROTOCOL
TELNET	23	LOGIN SERVICE FOR UNIX, SOMETIMES NT OR NOVELL
SMTP	23	INTERNET-STYLE SERVER-TO-SERVER E-MAIL
DOMAIN	53	DNS SERVICES (UDP AND TCP)
GOPHER	70	INTERNET GOPHER
HTTP	80	HYPERTEXT TRANSFER PROTOCOL (WEB)
POP2	109	POST OFFICE PROTOCOL VERSION 2 (USER E-MAIL)
POP3	110	POST OFFICE PROTOCOL VERSION 3 (USER EMAIL)
NNTP	119	USENET NEWS
NETBIOS-NS	137	NETBIOS NAME SERVICE
NETBIOS-DGM	138	NETBIOS “DATAGRAM” SERVICE
NETBIOS-SSN	139	NETBIOS “SESSION” SERVICE
IMAP	143	INTERACTIVE MAIL ACCESS PROTOCOL (USER E-MAIL)
SHELL	514	“RLOGIN” SOCKET - UNIX OR NT
PRINTER	515	LINE PRINTER DAEMON - NETWORK PRINTING FOR UNIX
SOCKS	1080	SOCKS PROXY SERVER (SOX 4 AND SOCKS 5)


	CLICK HERE *FOR THE COMPLETE* IANA LIST OF PORTS 1 THROUGH 65,535**

UTILITY	FUNCTION
PING + host or IP	USED TO CHECK THE CONNECTIVITY BETWEEN TWO HOSTS; USES ICMP MESSAGES FOR RESPONSE
ROUTE + host or IP	DISPLAYS THE ROUTING TABLE ON A COMPUTER
TRACERT + host or IP	TRACES THE PATH A PACKET TAKES THROUGH THE NETWORK HOP BY HOP (WINDOWS)
TRACEROUTE + host or IP	FOR UNIX
NETSTAT	DISPLAYS IP INFORMATION FOR A COOMPUTER INCLUDING CONNECTED SESSIONS. *VERY IMPORTANT*
NBSTAT	DISPLAYS NETBIOS OVER TCP/IP SETTINGS, USE -R TO RELOAD NETBIOS CACHE
IPCONFIG	DISPLAYS THE IP CONFIGURATION FOR A COMPUTER. USED TO RELEASE A DHCP LEASE.
ARP	DISPLAYS OR MODIFIED THE ARP CACHE ON A COMPUTER.
IPCONFIG	SHOWS UNIX NETWORK TCP/IP CONFIGURATION
IPCONFIG	SHOWS WINDOWS NT TYPE TCP/IP CONFIGURATION
WINIPCFG	SHOWS WINDOWS 9x TCP/IP CONFIGURATION
TELNET + hostname	CHECKS A TCP SERVICE TO SEE IF IT’S AVAILABLE
ETHSTAT	SHOWS ETHERNET STATISTICS (SOME UNIX)


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