Appendix D Common Services
Table 238 Commonly Used Services (continued)
NAME | PROTOCOL | PORT(S) | DESCRIPTION |
|
|
|
|
TELNET | TCP | 23 | Telnet is the login and terminal emulation |
|
|
| protocol common on the Internet and in |
|
|
| UNIX environments. It operates over TCP/ |
|
|
| IP networks. Its primary function is to allow |
|
|
| users to log into remote host systems. |
TFTP | UDP | 69 | Trivial File Transfer Protocol is an Internet |
|
|
| file transfer protocol similar to FTP, but |
|
|
| uses the UDP (User Datagram Protocol) |
|
|
| rather than TCP (Transmission Control |
|
|
| Protocol). |
VDOLIVE | TCP | 7000 | Another videoconferencing solution. |
|
|
|
|
656 |
| |
ZyWALL 2 Plus User’s Guide |
| |
|
|
|