3.6. Troubleshooting Setup
This appendix deals with connection problems that might occur when connecting a
management workstation to a Clavister Security Gateway.
If the management interface does not respond after the Clavister Security Gateway has powered
up and CorePlus has started, there are a number of simple steps to troubleshoot basic
connection problems:
1. Check that the correct interface is being used.
The most obvious problem is that the wrong Clavister Security Gateway interface has been used
for the initial connection. Only the first interface found by CorePlus is activated for the initial
connection from a browser after CorePlus starts for the first time.
2. Check that interface characteristics match.
If a Clavister Security Gateway's interface characteristics are configured manually then the
interface on a switch to which it is connected should be configured with the same characteristics.
For instance, the link speeds and half/full duplex settings must match. If they don't,
communication will fail. This problem will not occur if the interfaces are set for automatic
configuration on both sides and automatic is always the Clavister factory default setting.
3. Check that the workstation IP is configured correctly.
The second most obvious problem is if the IP address of the workstation running the web
browser is not configured correctly.
4. Is the management interface properly connected?
Check the link indicator lights on the management interface. If they are dark then there may be a
cable problem.
5. Check the cable type connected to the management interface.
Is the management interface connected directly to the management workstation or another
router or host? In this case, an Ethernet "cross-over" cable may be needed for the connection,
depending on the capabilities of the interface.
6. Using the ifstat CLI command.
To investigate a connection problem further, connect the a console to the RS-232 port on the
Clavister Security Gateway after CorePlus starts. When you press the enter key, CorePlus should
respond with the a standard CLI prompt. Now enter the following command a number of times:
Device:/> ifstat <if-name>
Where
<if-name>
is the name of the management interface. This will display a number of
counters for that interface. The
ifstat
command on its own can list the names of all the interfaces.
If the
Input
counters in the hardware section of the output are not increasing then the error is
likely to be in the cabling. However, it may simply be that the packets are not getting to the
Clavister Security Gateway in the first place. This can be confirmed with a packet sniffer if it is
available.
If the
Input
counters are increasing, the management interface may not be attached to the
correct physical network. There may also be a problem with the routing information in any
connected hosts or routers.
7. Using the arpsnoop CLI command.
Chapter 3: CorePlus Configuration
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Страница 64: ...Chapter 3 CorePlus Configuration 64...
Страница 72: ...Chapter 4 Product Maintenance 72...
Страница 79: ...Appendix B Declarations of Conformity 79...
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