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P-660H/HW/W-T Series User’ Guide
Chapter 11 Firewall Configuration
148
11.11 Anti-Probing
If an outside user attempts to probe an unsupported port on your Prestige, an ICMP response
packet is automatically returned. This allows the outside user to know the Prestige exists. The
Prestige supports anti-probing, which prevents the ICMP response packet from being sent.
This keeps outsiders from discovering your Prestige when unsupported ports are probed.
Internet Control Message Protocol (ICMP) is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP)
datagrams, but the messages are processed by the TCP/IP software and directly apparent to the
application user.
for more information.
Click
Firewall
in the navigation panel and click
Anti Probing
to display the screen as shown.
SMTP(TCP:25)
Simple Mail Transfer Protocol is the message-exchange standard for
the Internet. SMTP enables you to move messages from one e-mail
server to another.
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)
Simole Service Discovery Protocol (SSDP) is a discovery service
searching for Universal Plug and Play devices on your home network
or upstream Internet gateways using DUDP port 1900.
SSH(TCP/UDP:22)
Secure Shell Remote Login Program.
STRMWORKS(UDP:1558)
Stream Works Protocol.
SYSLOG(UDP:514)
Syslog allows you to send system logs to a UNIX server.
TACACS(UDP:49)
Login Host Protocol used for (Terminal Access Controller Access
Control System).
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.
Table 42
Predefined Services (continued)
SERVICE
DESCRIPTION
Содержание P-660H - VERSION 3.40
Страница 1: ...P 660H HW W T Series ADSL 2 Gateway User s Guide Version 3 40 6 2005...
Страница 9: ...P 660H HW W T Series User Guide 9 Customer Support...
Страница 31: ...P 660H HW W T Series User Guide 31 List of Figures...
Страница 37: ...P 660H HW W T Series User Guide 37 List of Tables...
Страница 41: ...P 660H HW W T Series User Guide 41 Introduction to DSL...
Страница 61: ...P 660H HW W T Series User Guide 61 Chapter 3 Wizard Setup for Internet Access...
Страница 89: ...P 660H HW W T Series User Guide 89 Chapter 5 Wireless LAN...
Страница 131: ...P 660H HW W T Series User Guide 131 Chapter 10 Firewalls...
Страница 161: ...P 660H HW W T Series User Guide 161 Chapter 13 Remote Management Configuration...
Страница 175: ...P 660H HW W T Series User Guide 175 Chapter 14 Universal Plug and Play UPnP...
Страница 181: ...P 660H HW W T Series User Guide 181 Chapter 15 Logs Screens...
Страница 195: ...P 660H HW W T Series User Guide 195 Chapter 16 Media Bandwidth Management Advanced Setup...
Страница 207: ...P 660H HW W T Series User Guide 207 Chapter 17 Maintenance...
Страница 217: ...P 660H HW W T Series User Guide 217 Chapter 19 Menu 1 General Setup...
Страница 221: ...P 660H HW W T Series User Guide 221 Chapter 20 Menu 2 WAN Backup Setup...
Страница 225: ...P 660H HW W T Series User Guide 225 Chapter 21 Menu 3 LAN Setup...
Страница 229: ...P 660H HW W T Series User Guide 229 Chapter 22 Wireless LAN Setup...
Страница 235: ...P 660H HW W T Series User Guide 235 Chapter 23 Internet Access...
Страница 249: ...P 660H HW W T Series User Guide 249 Chapter 25 Static Route Setup...
Страница 253: ...P 660H HW W T Series User Guide 253 Chapter 26 Bridging Setup...
Страница 269: ...P 660H HW W T Series User Guide 269 Chapter 27 Network Address Translation NAT...
Страница 285: ...P 660H HW W T Series User Guide 285 Chapter 29 Filter Configuration...
Страница 305: ...P 660H HW W T Series User Guide 305 Chapter 32 System Information and Diagnosis...
Страница 317: ...P 660H HW W T Series User Guide 317 Chapter 33 Firmware and Configuration File Maintenance...
Страница 323: ...P 660H HW W T Series User Guide 323 Chapter 34 System Maintenance...
Страница 327: ...P 660H HW W T Series User Guide 327 Chapter 35 Remote Management...
Страница 337: ...P 660H HW W T Series User Guide 337 Chapter 36 IP Policy Routing...
Страница 341: ...P 660H HW W T Series User Guide 341 Chapter 37 Call Scheduling...
Страница 353: ...P 660H HW W T Series User Guide 353 Chapter 38 Troubleshooting Figure 232 Security Setting ActiveX Controls...
Страница 357: ...P 660H HW W T Series User Guide 357 Appendix A...
Страница 359: ...P 660H HW W T Series User Guide 359 Appendix B...
Страница 383: ...P 660H HW W T Series User Guide 383 Appendix D...
Страница 387: ...P 660H HW W T Series User Guide 387 Appendix F...
Страница 393: ...P 660H HW W T Series User Guide 393 Appendix G...
Страница 397: ...P 660H HW W T Series User Guide 397 Appendix H...
Страница 400: ...P 660H HW W T Series User Guide Appendix I 400...
Страница 401: ...P 660H HW W T Series User Guide 401 Appendix I...
Страница 455: ...P 660H HW W T Series User Guide 455 Appendix M...