GE 23954 Manuel D’Utilisation

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10.4  TROUBLESHOOTING WEB ACCESS 
Refer to the following table for troubleshooting most common problems in accessing the embedded 
web interface. Please note that proper browser configuration is responsibility of the user – this section 
aims to give guidance to understanding the common access problems and browser errors. 
 
Problem Recommended 
resolution 
Browser error: 
”Connection refused” 
”No page to display” 
”Could not connect to server” 
”The page cannot be displayed” 
”Cannot find server” 
Check the correctness of the specified URL. The 
URL should specify either the adapter IP address 
or the hostname: 
•  Plain HTTP access, example 
http://192.168.10.10 or http://SnmpAdapter 
•  HTTPS (SSL) access, example 
https://192.168.10.10 or https://SnmpAdapter 
Check that the web interface service has been 
enabled on the SNMP/Web adapter. If using 
HTTPS, verify it has been enabled on the adapter. 
Verify username and password used.  
Browser error: 
”Unauthorized” 
Check that the user has been correctly defined 
and configured by the administrator – that is, 
web interface access is allowed. 
When accessing the web interface using HTTPS, 
the browser verifies that: 
Security alert  
•  The issuing Certificate Authority (CA) is on its 
list of trusted CAs.  
•  The server's certificate is valid 
•  The adapter IP-Address/DNS-name matches 
the name on the certificate 
If one of these checks fails the browser will issue 
a security alert. The Encryption section explains 
out to download the CA Root Certificate for 
installation in the browser trusted CA repository. 
 
 
10.5  TROUBLESHOOTING DATE&TIME (NTP)  
When NTP server connection is configured and enabled, the SNMP/Web adapter will periodically re-
synch its internal date and time settings with the NTP server. Should you experience problems with this 
functionality, perform the following checks: 
•  Verify that the NTP server is correctly working in the specified node 
•  Force a date/time update either by running an ntpdate command through the command line 
interface or pressing the ‘Update Now’ button on the Date&Time web page. If unsuccessful, 
there is a communication problem between the adapter and the NTP server: 
Verify that the NTP server can be reached from the adapter. This can be easily verified by 
running a ping command through the command-line interface 
If a symbolic name is used in place of an IP address for the NTP server, verify that the name 
is resolved in the correct IP address through DNS connection. This can be easily verified by 
running a nslookup command, either through the command-line interface or the web 
interface. 
•  If the update is successful, but the actual time does not correspond to the expected value, verify 
that time-zone setting. Note that the time-zone setting also controls the daylight saving setting. 
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OPM_CNT_SNM_BAS_CRD_1GB_V012.doc 
Operating Manual SNMP/Web Adapter