Well Knowned Port Number

We have to memorize the famous well known ports because sometime we need to configure these port number in router .

We can set block or permit these port number at router ( act as firewall to block/permit the port number ).

To open certain port for specific workstation ( need to know this workstation static IP address )
is called "port forwarding" ( will be discussed in separate topic ) .

The following are the well known ports that we should memorize for Network+ .


Port Number
Description
1
TCP Port Service Multiplexer (TCPMUX)
5
Remote Job Entry (RJE)
7
ECHO
18
Message Send Protocol (MSP)
20
FTP -- Data
21
FTP -- Control
22
SSH Remote Login Protocol
23
Telnet
25
Simple Mail Transfer Protocol (SMTP)
29
MSG ICP
37
Time
42
Host Name Server (Nameserv)
43
WhoIs
49
Login Host Protocol (Login)
53
Domain Name System (DNS)
69
Trivial File Transfer Protocol (TFTP)
70
Gopher Services
79
Finger
80
HTTP
103
X.400 Standard
108
SNA Gateway Access Server
109
POP2
110
POP3
115
Simple File Transfer Protocol (SFTP)
118
SQL Services
119
Newsgroup (NNTP)
137
NetBIOS Name Service
139
NetBIOS Datagram Service
143
Interim Mail Access Protocol (IMAP)
150
NetBIOS Session Service
156
SQL Server
161
SNMP
179
Border Gateway Protocol (BGP)
190
Gateway Access Control Protocol (GACP)
194
Internet Relay Chat (IRC)
197
Directory Location Service (DLS)
389
Lightweight Directory Access Protocol (LDAP)
396
Novell Netware over IP
443
HTTPS
444
Simple Network Paging Protocol (SNPP)
445
Microsoft-DS
458
Apple QuickTime
546
DHCP Client
547
DHCP Server
563
SNEWS
569
MSN
1080
Socks