22.13 Warning Log
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## 22.13 Warning Log

The Warning log displays warning messages about errors of little significance. Warnings can display for example reports about invalid user login (invalid username or password), error in communication of the server and Web administration interface, etc.

Events recalling warning messages in this log do not seriously affect WinRoute functionality. However, they can point at current or possible problems. The Warning log can help if for example a user is complaining that certain services are not working.

Each warning message is identified by its numerical code (`code xxx:`). The following warning categories are defined:

- `1000-1999` — system warnings (e.g. an application found that is known as conflicting)

- `2000-2999` — WinRoute configuration problems (e.g. HTTP rules require user authentication, but the WWW interface is not enabled)

- `3000-3999` — warning from individual WinRoute modules (e.g. DHCP server, anti-virus check, user authentication, etc.)

- `4000-4999` — license warnings (subscription expiration, forthcoming expiration of WinRoute's license, ISS OrangeWeb Filter license, or the McAfee anti-virus license)

  Note: License expiration is considered to be an error and it is logged into the Error log.

### Examples of Warning logs

`[15/Apr/2008 15:00:51] (3004) Authentication subsystem warning: Kerberos 5 auth: user james@company.com not authenticated`

`[15/Apr/2008 15:00:51] (3004) Authentication subsystem warning: Invalid password for user admin`

`[16/Apr/2008 10:53:20] (3004) Authentication subsystem warning: User jflyaway doesn't exist`

- The first log informs that authentication of user `jsmith` by the Kerberos system in the `company.com` domain failed

- The second log informs on a failed authentication attempt by user `admin` (invalid password)

- The third log informs on an authentication attempt by a user which does not exist (`johnblue`)

Note: With the above three examples, the relevant records will also appear in the `Security` log.

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