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Cisco Router and Security Device Manager Version 2.2 User’s Guide
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Chapter30 More About....
Services and Ports
•IP Services
•Services That Can Be Specified in Inspection Rules
TCP Services
TCP Service Port Number Description
bgp 179 Border Gateway Protocol.BGP exchanges reachability
information with other systems that use the BGP protocol
chargen 19 Character generator.
cmd 514 Remote commands. Similar to exec except that cmd has
automatic authentication
daytime 13 Daytime
discard 9 Discard
domain 53 Domain Name Serv ice. System used on the Internet for
translating names of etwork nodes into addresses.
echo 7 Echo request. Message sent when ping command is issued.
exec 512 Remote process execution
finger 79 Finger. Application that determines whether a person has an
account at a particular internet site.
ftp 21 File Transfer Protocol. Application-layer protocol used for
transferring files between network nodes.
ftp-data 20 FTP data connections
gopher 70 Gopher. A distributed document delivery system.
hostname 101 NIC hostname server
ident 113 Ident Protocol
irc 194 Internet Relay Chat. A world-wide protocol that allows users to
exchange text messages with each other in real time.
klogin 543 Kerberos login. Kerberos is a developing stand ard for
authenticating network users.
kshell 544 Kerberos shell
login 513 Login