The Most Common Used Firewall Ports

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The Most Common Used Firewall Ports
Post Description: if you are a network administrator, you will find this port helpful. these are the most commonly used ports for firewall and server or computer used today to block ports on your network or system
Tags: the, most, common, used, firewall, ports
This Post Was Posted On Feb 28, 2010 By Hostman #3211
The Most Common Used Firewall Ports by Hostman
if you are a network administrator, you will find this port helpful. these are the most commonly used ports for firewall and server or computer used today to block ports on your network or system. of course this list does not cover all possible ports
if you are interested in the complete list of all possible ports, please let me know and i can post it

i just posted these because these are the most commonly used ports i use when i need to configure a firewall for example



when i was taking the network + exam, this was also helpful to remember these ports as they are in the test.



port numberTCP/UDPPROTOCOLPrograms
20 &21TCPFTPProFTP, WU FTP
22TCPSSHOpenSS, lsh
23TCPTelnetin.telnetd
25TCPSMTPSendmail, Postfix, Exim, qmail
53TCP/
UDP		DNSBIND
67UDPDHCPDHCP
69UDPTFTPin.tftpd
80TCPHTTPDApache, thttpd
Table Created By Webune.com
88TCPKerberosMIT, Kerberos, Heimdal
109 & 110TCPPOP2/POP3UW IMAP
111TCPPortmapperNFS, NIS
113TCPauth/idenidentd
119TCPNNTPINN, Leafnode
123UNTPNTP
137UDPNetBIOS Name ServiceSamba
138UDPNetBIOS DatagramSamba
139TCPNetBIOS SessionSamba
143TCPIMAP 2UW IMAP
177TCPXDMCPXDM, KDM, GDM
220TCPIMAP 3UW IMAP
389TCPLDAPOpenLDAP
443TCPHTTPSApache
445TCPMicrosof DsSamba
514UDPSyslogsyslogd
515TCPSpoolerBSD LDP, LPRng, cups-ldp
melvin
#4482 1
if you are getting ready to take the security plus exam, i would study these ports too

well-known tcp ports
tcp port number service
20 ftp (data channel)
21 ftp (control channel)
22 ssh
23 telnet
25 smtp
49 tacacs authentication service
80 http (used for the world wide web)
110 pop3
119 nntp
139 netbios session service
143 imap
389 ldap
443 https (used for secure web connections)
53 dns name queries
69 trivial file transfer protocol (tftp)
137 netbios name service
138 netbios datagram service
161 snmp
162 snmp trap


commonly used ports
port service/protocol
7 echo
11 systat
15 netstat
19 chargen
20 ftp-data
21 ftp
22 ssh
23 telnet
25 smtp
49 tacacs
53 dns
80 http
110 pop3
111 portmap
137, 138, 139 netbios
161/162 snmp
443 https
445 smb
1,812 radius
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