14 • ICMP
Access Server Administrators’ Reference Guide
150
Introduction
Introduction
Under normal circumstances, IP makes very efficient use of system resources. However errors, congestion and
system malfunctions occur periodically. ICMP (Internet Control Message Protocol) assists network managers
with IP routing by sending control and error reporting messages between IP hosts. The statistics listed on the
access server
ICMP
window (see figure 46) comprise those contained in RFC 792—Internet Control Message
Protocol (ICMP). Implementation of the ICMP group is mandatory for all TCP/IP networks.
Figure 46. ICMP window
Click on
ICMP
under the
Configuration Menu
to monitor access server ICMP statistics.
Modify ICMP redirect action
This section is where you configure how the access server handles ICMP redirects. Enabling the access server to
receive redirected messages is generally considered a security breach.
Block ICMP redirects (boxBLockIcmpRedirects)
The following options are available:
•
allowredirects(0)
•
stopredirects(1)
ICMP Receive/Send Messages window
The ICMP window displays the ICMP message counters. ICMP messages are displayed in the window as col-
umns comprising two types of messages:
•
Messages received by the access server (InMibVariable)
•
Messages sent by the access server (OutMibVariable)
Содержание Access Server
Страница 24: ...Contents Access Server Administrators Reference Guide 24 ...
Страница 28: ...About this guide Model 2960 RAS Getting Started Guide 28 ...
Страница 32: ...1 Introduction Access Server Administrators Reference Guide 32 Saving HTTP HTML Object Changes ...
Страница 37: ...37 Chapter 3 Import Export Chapter contents Introduction 38 Export Configuration 38 Import Configuration 40 ...
Страница 48: ...4 Alarms Access Server Administrators Reference Guide 48 Modify Alarms Configuring alarm severity levels ...
Страница 58: ...5 Authentication Access Server Administrators Reference Guide 58 Static User Authentication ...
Страница 94: ...7 Dial In Access Server Administrators Reference Guide 94 Dial In User Statistics window ...
Страница 110: ...8 Dial Out Access Server Administrators Reference Guide 110 Dial Out User Statistics window ...
Страница 114: ...9 Drop and Insert Access Server Administrators Reference Guide 114 Drop and Insert main window ...
Страница 134: ...12 Filter IP Access Server Administrators Reference Guide 134 Defining a filter ...
Страница 148: ...13 Frame Relay Access Server Administrators Reference Guide 148 Link Status and the IP Forwarding ...
Страница 174: ...17 MFR Version 2 Access Server Administrators Reference Guide 174 ...
Страница 184: ...17 MFR Version 2 Access Server Administrators Reference Guide 184 MFR Version 2 Modify ...
Страница 190: ...18 RIP Version 2 Access Server Administrators Reference Guide 190 RIP Version 2 Statistics ...
Страница 196: ...19 SNMP Access Server Administrators Reference Guide 196 Out ...
Страница 248: ...23 TCP Access Server Administrators Reference Guide 248 TCP Details ...
Страница 252: ...24 UDP Access Server Administrators Reference Guide 252 Introduction ...
Страница 253: ...253 Chapter 25 About Chapter contents Introduction 254 Patton Electronics Company contact information 254 ...
Страница 258: ...26 License Access Server Administrators Reference Guide 258 End User License Agreement ...