List of Important Protocols and Port Numbers

By admin on Feb 22, 2011 with Comments 1

Important Protocols -Port Numbers (L4):

Protocol	Service Expansion	Port No(TCP/UDP)
FTP	File Transfer Protocol	21/21/TCP
SSH	Secure Shell	22/22/TCP
TELNET	Terminal Network	23/23/TCP
SMTP	Simple Mail Transfer Protocol	25/25/TCP
DNS	Domain Naming System	53/53/TCP & UDP
DHCP	Dynamic Host Configuration Protocol	67/67/UDP –Server 68/UDP for Client
TFTP	Trivial File Transfer Protocol	69/69/UDP
HTTP	Hypertext Transfer Protocol	80/80/TCP
POP3	Post Office Protocol	110/110/TCP
NTP	Network Time Protocol	123/123/UDP
IMAP	Internet Message Access Protocol	143/143/TCP
SNMP	Simple Network Management Protocol	161/161/TCP
HTTPS	HTTP secure	443/443/TCP
SYSLOG	System Log	514/514/UDP
LPD	Line Printer Daemon	515/TCP
RSTP	Real Time Stream Protocol	554/TCP
IPP	Internet Printing Protocol	631/TCP
Flexlm	FLEXible License Manager	744/UDP
SWAT	Samba Web Administration Tool	901/TCP
IMAPS	Interactive Mail Access Protocol Secure version 4	993/TCP
IRCS	Internet Relay Chat Secure	994/TCP
POP3s	Post Office Protocol Secure version 3	995/TCP
NFS	Network File System by Sun)	613/TCP&UDP
CVSPserver	Concurrent Version System Password server	2401/TCP
X11	X window system server	6000/TCP–6063/TCP
HTTP-ALT	Alternative http	8080/TCP

Important Protocols – Port Numbers (L3):

Protocol	Expansion	Port No
IP	Internet Protocol	0
ICMP	Internet Control Message Protocol	1
TCP	Transmission Control Protocol	6
UDP	User Datagram Protocol	11/17
RIP	Routing Information Protocol	520
EIGRP	Enhanced Integrated Gateway Routing Protocol	88
OSPF	Open Shortest Path First	89
BGP	Border Gateway Protocol	179