A-12
Cisco ASA 5500 Series Configuration Guide using ASDM
AppendixA Addresses, Protocols, and Ports
TCP and UDP Ports
•To assign a port for DNS access, use the domain literal value, not dns. If you use dns, the ASA
assumes you meant to use the dnsix literal value.
Port numbers can be viewed online at the IANA website:
http://www.iana.org/assignments/port-numbers
TableA-7 Port Literal Values
Literal TCP or UDP? Value Description
aol TCP 5190 America Online
bgp TCP 179 Border Gateway Protocol, RFC 1163
biff UDP 512 Used by mail system to notify users that new mail is
received
bootpc UDP 68 Bootstrap Protocol Client
bootps UDP 67 Bootstrap Protocol Server
chargen TCP 19 Character Generator
citrix-ica TCP 1494 Citrix Independent Computing Architecture (ICA)
protocol
cmd TCP 514 Similar to exec except that cmd has automatic
authentication
ctiqbe TCP 2748 Computer Telephony Interface Quick Buffer
Encoding
daytime TCP 13 Day time, RFC 867
discard TCP, UDP 9 Discard
domain TCP, UDP 53 DNS
dnsix UDP 195 DNSIX Session Management Module Audit
Redirector
echo TCP, UDP 7 Echo
exec TCP 512 Remote process execution
finger TCP 79 Finger
ftp TCP 21 File Transfer Protocol (control port)
ftp-data TCP 20 File Transfer Protocol (data port)
gopher TCP 70 Gopher
https TCP 443 HTTP over SSL
h323 TCP 1720 H.323 call signalling
hostname TCP 101 NIC Host Name Server
ident TCP 113 Ident authentication service
imap4 TCP 143 Internet Message Access Protocol, version 4
irc TCP 194 Internet Relay Chat protocol
isakmp UDP 500 Internet Security Association and Key Management
Protocol
kerberos TCP, UDP 750 Kerberos