Cisco OL-4015-08 User Manual page 571

Chapter 30 More About....
TCP Services
TCP Service
bgp
chargen
cmd
daytime
discard
domain
echo
exec
finger
ftp
ftp-data
gopher
hostname
ident
irc
klogin
kshell
login
OL-4015-08
IP Services
•
Services That Can Be Specified in Inspection Rules
•
Port Number Description
179 Border Gateway Protocol.BGP exchanges reachability
information with other systems that use the BGP protocol
19 Character generator.
514 Remote commands. Similar to exec except that cmd has
automatic authentication
13 Daytime
9 Discard
53 Domain Name Service. System used on the Internet for
translating names of etwork nodes into addresses.
7 Echo request. Message sent when ping command is issued.
512 Remote process execution
79 Finger. Application that determines whether a person has an
account at a particular internet site.
21 File Transfer Protocol. Application-layer protocol used for
transferring files between network nodes.
20 FTP data connections
70 Gopher. A distributed document delivery system.
101 NIC hostname server
113 Ident Protocol
194 Internet Relay Chat. A world-wide protocol that allows users to
exchange text messages with each other in real time.
543 Kerberos login. Kerberos is a developing standard for
authenticating network users.
544 Kerberos shell
513 Login
Cisco Router and Security Device Manager Version 2.2 User's Guide
Services and Ports
30-7