Relevant Alarms
None.
Relevant Logs
None.
10.6.3 Internal Host with a Conflicting IP Address Fails to Access
an External Server
Common Causes
This fault is commonly caused by one of the following:
l Inbound and outbound interfaces through which internal users access the public network
go Down.
l Outbound NAT is incorrectly configured on the outbound interface.
l NAT ALG is disabled for the DNS protocol.
l The DNS mapping entry is configured incorrectly. For example, the corresponding public
address is different from the IP address of an external server.
l The route between the temporary address pool and the outbound interface is not configured.
Troubleshooting Flowchart
Figure 10-16 shows the troubleshooting flowchart.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 10 Security
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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