Logwatch - httpd level error - was ist das?

[technotravel]

In meinen logwatch Nachrichten taucht immer ein Eintrag auf wie dieser:

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HTTPD Errors
Level error :      4 Time(s)

Ich kann damit nicht viel anfangen und konnte auch nichts Verständliches dazu finden. Muss wohl was mit dem Apache sein - aber was ist es? Muss ich mir Sorgen machen?

[Jolinar]

Da Logwatch die Daten aus den Logfiles aggregiert, könntest du mal direkt ins Logfile schauen und nach Einträgen mit

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HTTPD

suchen.
Die entsprechenden Logfileeinträge sollten dir weitere Informationen liefern.

[technotravel]

Nix gefunden - weder httpd noch level

[Fezzi]

Ich habe das mal bei eingegeben... die KI SUMA https://www.perplexity.ai spuckt das dazu aus...

To address HTTPD errors, particularly focusing on error logging in Apache, it's essential to understand the types of errors and how to configure logging effectively.

## Types of HTTPD Errors

HTTPD errors can be categorized primarily into two groups:

1. **Client Errors (4xx)**:
- These errors indicate that the client made a bad request. Common examples include:
- **404 Not Found**: The requested resource could not be found.
- **403 Forbidden**: The server understood the request, but it refuses to authorize it.
- **429 Too Many Requests**: The user has sent too many requests in a given amount of time.

2. **Server Errors (5xx)**:
- These errors signify that the server failed to fulfill a valid request. Common examples include:
- **500 Internal Server Error**: A generic error message when the server encounters an unexpected condition.
- **503 Service Unavailable**: The server is currently unable to handle the request due to temporary overload or maintenance.

## Apache Error Logging

### Log Levels

Apache provides various log levels that determine the verbosity of the logs. The levels include:

- **emerg**
- **alert**
- **crit**
- **error**
- **warn**
- **notice**
- **info**
- **debug**

For instance, setting the log level to `error` will only log error messages, while `debug` will log detailed information useful for troubleshooting[1][4].

### Configuring Error Logs

The location of the Apache error log varies by operating system:

- **Red Hat/CentOS/Fedora**: `/var/log/httpd/error_log`
- **Debian/Ubuntu**: `/var/log/apache2/error.log`

You can configure the log location using the `ErrorLog` directive in the Apache configuration file. The format of the error log can also be customized using the `ErrorLogFormat` directive, allowing you to include timestamps, process IDs, and client information[1][4].

### Viewing and Analyzing Logs

To effectively analyze Apache error logs:

- Regularly monitor the logs for patterns in errors.
- Use tools or scripts to filter and summarize log entries for easier analysis.
- Consider adjusting the log level temporarily to `debug` during troubleshooting to capture more detailed information about errors[3][4].

### Common Issues and Solutions

- **Frequent 404 Errors**: Check for missing files or incorrect URLs.
- **500 Errors**: Investigate server configurations, permissions, and backend service availability.
- **503 Errors**: Assess server load and consider scaling resources if traffic is high or if the server is under maintenance[2][4].

By understanding these aspects of HTTPD errors and logging, you can maintain a more reliable and resilient web server.

Citations:
[1] https://stackify.com/apache-error-log-explained/
[2] https://umbraco.com/knowledge-base/http-status-codes/
[3] https://www.apachelounge.com/viewtopic.php?t=8637
[4] https://sematext.com/blog/apache-logs/
[5] https://stackoverflow.com/questions/205 ... -message-0
[6] https://www.sumologic.com/blog/apache-error-logs/
[7] https://serverfault.com/questions/66244 ... apache-2-4
[8] https://httpd.apache.org/docs/2.4/logs.html

[technotravel]

Haha - gute Idee, mal KI zu probieren

Dankeschön, damit kann ich was anfangen

[tab-kh]

Ich vermute einfach mal, das ist so etwas wie das hier:

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--------------------- HTTPD Errors Begin ------------------------ 

 
 Level warn  
    warn code: AH01906
       webmail:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?):  3 Time(s)
    warn code: AH01909
       webmail:443:0 server certificate does NOT include an ID which matches the server name:  3 Time(s)
 Level error 
    error code: AH02604
       Unable to configure certificate webmail:443:0 for stapling:  3 Time(s)
    error code: AH02217
       ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: emailAddress=info@keyhelp.de,CN=army.tabserver.de,OU=KeyHelp Control Panel,O=KeyHelp,L=Erfurt,ST=Thuringia,C=DE / issuer: emailAddress=info@keyhelp.de,CN=army.tabserver.de,OU=KeyHelp Control Panel,O=KeyHelp,L=Erfurt,ST=Thuringia,C=DE / serial: 2525EA6183DD588AF4AAF0933312FB1C86660785 / notbefore: Apr  5 20:08:36 2024 GMT / notafter: Apr  3 20:08:36 2034 GMT]:  3 Time(s)

Edit: Einfach mal bei Logwatch "--detail high" oder "--detail 10" setzen für einen Tag, dann siehst du wahrscheinlich schon die Details der Errors. Oder noch einfacher logwatch einmal manuell mit höheren Werten für "--detail" starten und das Ergebnis anschaun.

Edit2: Oder es ist eventuell sowas, schon etwas spannender:

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    error code: AH10244
       invalid URI path (/cgi-bin/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/%%32%65%%32%65/bin/sh):  1 Time(s)
       invalid URI path (/cgi-bin/.%2e/.%2e/.%2e/.%2e/.%2e/.%2e/.%2e/.%2e/.%2e/.%2e/bin/sh):  1 Time(s)
    error code: AH02032
       Hostname meinedomain.de provided via SNI and hostname baike.baidu.com provided via HTTP have no compatible SSL setup:  1 Time(s)

[technotravel]

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--------------------- HTTPD Errors Begin ------------------------ 

 
 Level warn  
    warn code: AH01906
       webmail:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?):  3 Time(s)
    warn code: AH01909
       webmail:443:0 server certificate does NOT include an ID which matches the server name:  3 Time(s)
 Level error 
    error code: AH02604
       Unable to configure certificate webmail:443:0 for stapling:  3 Time(s)
    error code: AH02217
       ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: emailAddress=info@keyhelp.de,CN=army.tabserver.de,OU=KeyHelp Control Panel,O=KeyHelp,L=Erfurt,ST=Thuringia,C=DE / issuer: emailAddress=info@keyhelp.de,CN=army.tabserver.de,OU=KeyHelp Control Panel,O=KeyHelp,L=Erfurt,ST=Thuringia,C=DE / serial: 2525EA6183DD588AF4AAF0933312FB1C86660785 / notbefore: Apr  5 20:08:36 2024 GMT / notafter: Apr  3 20:08:36 2034 GMT]:  3 Time(s)

Jaa - davon habe ich allerdings einige. Wann gibt es endlich LE für das webmail, ohne den Apache verbiegen zu müssen