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)
Summary of Contents for Access Server
Page 24: ...Contents Access Server Administrators Reference Guide 24 ...
Page 28: ...About this guide Model 2960 RAS Getting Started Guide 28 ...
Page 58: ...5 Authentication Access Server Administrators Reference Guide 58 Static User Authentication ...
Page 94: ...7 Dial In Access Server Administrators Reference Guide 94 Dial In User Statistics window ...
Page 110: ...8 Dial Out Access Server Administrators Reference Guide 110 Dial Out User Statistics window ...
Page 134: ...12 Filter IP Access Server Administrators Reference Guide 134 Defining a filter ...
Page 174: ...17 MFR Version 2 Access Server Administrators Reference Guide 174 ...
Page 184: ...17 MFR Version 2 Access Server Administrators Reference Guide 184 MFR Version 2 Modify ...
Page 190: ...18 RIP Version 2 Access Server Administrators Reference Guide 190 RIP Version 2 Statistics ...
Page 196: ...19 SNMP Access Server Administrators Reference Guide 196 Out ...
Page 248: ...23 TCP Access Server Administrators Reference Guide 248 TCP Details ...
Page 252: ...24 UDP Access Server Administrators Reference Guide 252 Introduction ...
Page 258: ...26 License Access Server Administrators Reference Guide 258 End User License Agreement ...