Appendix D Services
AX/DX/EX/PX Series User’s Guide
540
NFS UDP 2049 Network File System - NFS is a client/server distributed 
file service that provides transparent file sharing for 
network environments.
NNTP TCP 119 Network News Transport Protocol is the delivery 
mechanism for the USENET newsgroup service.
PING User-Defined 1 Packet INternet Groper is a protocol that sends out 
ICMP echo requests to test whether or not a remote 
host is reachable.
POP3 TCP 110 Post Office Protocol version 3 lets a client computer 
get email from a POP3 server through a temporary 
connection (TCP/IP or other).
POP3S TCP 995 This is a more secure version of POP3 that runs over 
SSL.
PPTP TCP 1723 Point-to-Point Tunneling Protocol enables secure 
transfer of data over public networks. This is the 
control channel.
PPTP_TUNNEL (GRE) User-Defined 47 PPTP (Point-to-Point Tunneling Protocol) enables 
secure transfer of data over public networks. This is the 
data channel.
RCMD TCP 512 Remote Command Service.
REAL_AUDIO TCP 7070 A streaming audio service that enables real time 
sound over the web.
REXEC TCP 514 Remote Execution Daemon.
RLOGIN TCP 513 Remote Login.
ROADRUNNER TCP/UDP 1026 This is an ISP that provides services mainly for cable 
modems.
RTELNET TCP 107 Remote Telnet.
RTSP TCP/UDP 554 The Real Time Streaming (media control) Protocol 
(RTSP) is a remote control for multimedia on the 
Internet.
SFTP TCP 115 The Simple File Transfer Protocol is an old way of 
transferring files between computers.
SMTP TCP 25 Simple Mail Transfer Protocol is the message-
exchange standard for the Internet. SMTP enables 
you to move messages from one email server to 
another.
SMTPS TCP 465 This is a more secure version of SMTP that runs over SSL.
SNMP TCP/UDP 161 Simple Network Management Program.
SNMP-TRAPS TCP/UDP 162 Traps for use with the SNMP (RFC:1215).
SQL-NET TCP 1521 Structured Query Language is an interface to access 
data on many different types of database systems, 
including mainframes, midrange systems, UNIX 
systems and network servers.
SSDP UDP 1900 The Simple Service Discovery Protocol supports 
Universal Plug-and-Play (UPnP).
SSH TCP/UDP 22 Secure Shell Remote Login Program.
STRM WORKS UDP 1558 Stream Works Protocol.
SYSLOG UDP 514 Syslog allows you to send system logs to a UNIX server.
Table 205   Examples of Services (continued)
NAME PROTOCOL PORT(S) DESCRIPTION