Prestige 661H/HW Series User’s Guide
Chapter 12 Firewall Configuration
160
12.11 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.
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 45
Predefined Services (continued)
SERVICE
DESCRIPTION
Summary of Contents for Prestige 661H Series
Page 37: ...Prestige 661H HW Series User s Guide 37 List of Tables...
Page 41: ...Prestige 661H HW Series User s Guide 41 Introduction to DSL...
Page 51: ...Prestige 661H HW Series User s Guide 51 Chapter 1 Getting To Know Your Prestige...
Page 67: ...Prestige 661H HW Series User s Guide 67 Chapter 3 Wizard Setup for Internet Access...
Page 81: ...Prestige 661H HW Series User s Guide 81 Chapter 5 LAN Setup...
Page 125: ...Prestige 661H HW Series User s Guide 125 Chapter 8 Network Address Translation NAT Screens...
Page 143: ...Prestige 661H HW Series User s Guide 143 Chapter 11 Firewalls...
Page 165: ...Prestige 661H HW Series User s Guide 165 Chapter 12 Firewall Configuration...
Page 169: ...Prestige 661H HW Series User s Guide 169 Chapter 13 Content Filtering...
Page 175: ...Prestige 661H HW Series User s Guide 175 Chapter 14 Introduction to IPSec...
Page 203: ...Prestige 661H HW Series User s Guide 203 Chapter 15 VPN Screens...
Page 207: ...Prestige 661H HW Series User s Guide 207 Chapter 16 Remote Management Configuration...
Page 221: ...Prestige 661H HW Series User s Guide 221 Chapter 17 Universal Plug and Play UPnP...
Page 227: ...Prestige 661H HW Series User s Guide 227 Chapter 18 Logs Screens...
Page 241: ...Prestige 661H HW Series User s Guide 241 Chapter 19 Media Bandwidth Management Advanced Setup...
Page 265: ...Prestige 661H HW Series User s Guide 265 Chapter 21 Maintenance...
Page 275: ...Prestige 661H HW Series User s Guide 275 Chapter 23 Menu 1 General Setup...
Page 279: ...Prestige 661H HW Series User s Guide 279 Chapter 24 Menu 2 WAN Backup Setup...
Page 283: ...Prestige 661H HW Series User s Guide 283 Chapter 25 Menu 3 LAN Setup...
Page 287: ...Prestige 661H HW Series User s Guide 287 Chapter 26 Wireless LAN Setup...
Page 293: ...Prestige 661H HW Series User s Guide 293 Chapter 27 Internet Access...
Page 307: ...Prestige 661H HW Series User s Guide 307 Chapter 29 Static Route Setup...
Page 311: ...Prestige 661H HW Series User s Guide 311 Chapter 30 Bridging Setup...
Page 327: ...Prestige 661H HW Series User s Guide 327 Chapter 31 Network Address Translation NAT...
Page 343: ...Prestige 661H HW Series User s Guide 343 Chapter 33 Filter Configuration...
Page 363: ...Prestige 661H HW Series User s Guide 363 Chapter 36 System Information and Diagnosis...
Page 381: ...Prestige 661H HW Series User s Guide 381 Chapter 38 System Maintenance...
Page 385: ...Prestige 661H HW Series User s Guide 385 Chapter 39 Remote Management...
Page 395: ...Prestige 661H HW Series User s Guide 395 Chapter 40 IP Policy Routing...
Page 399: ...Prestige 661H HW Series User s Guide 399 Chapter 41 Call Scheduling...
Page 411: ...Prestige 661H HW Series User s Guide 411 Chapter 42 VPN IPSec Setup...
Page 415: ...Prestige 661H HW Series User s Guide 415 Chapter 43 SA Monitor...
Page 431: ...Prestige 661H HW Series User s Guide 431 Appendix A...
Page 451: ...Prestige 661H HW Series User s Guide 451 Appendix C IP Subnetting...
Page 455: ...Prestige 661H HW Series User s Guide 455 Appendix E Command Interpreter...
Page 461: ...Prestige 661H HW Series User s Guide 461 Appendix F Firewall Commands...
Page 464: ...Prestige 661H HW Series User s Guide Appendix G NetBIOS Filter Commands 464...
Page 465: ...Prestige 661H HW Series User s Guide 465 Appendix G NetBIOS Filter Commands...
Page 479: ...Prestige 661H HW Series User s Guide 479 Appendix H VPN Setup...
Page 482: ...Prestige 661H HW Series User s Guide Appendix I Splitters and Microfilters 482...
Page 483: ...Prestige 661H HW Series User s Guide 483 Appendix I Splitters and Microfilters...
Page 537: ...Prestige 661H HW Series User s Guide 537 Appendix M Internal SPTGEN...