Windows Diary

Centos Squid Error Log Solutions

Posted on by Dean Cuni

 

Here are some easy ways to fix the Centos-Squid error log issue.

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    centos squid error log

    F. How can I view file signal from Squid proxy on CentOS Linux Server 5.0?

    A. squid is a powerful caching proxy for web clients that supports FTP, Gopher and HTTP data objects. Unlike typical caching software, Squid handles all requests in a single, non-blocking I / O-driven process.

    / Var / Log / Squid / Log File For Directory

    Logs are a valuable source of information about Squid workloads and performance. Logs record not only access information, but also system configuration errors and attacks on resources (e.g. RAM, hard disk space). Squid maintains multiple log files. Some of them can be explicitly enabled for the entire time taken together, others can be safely disabled during that time.neither.

    • /var/log/squid/access.log, it has been found that most log file analyzers rely on entries in access.log. You can use this file to find out who is using the Squid server, but what are they doing, etc.
    • /var/log/squid/cache.log: The cache.log file contains debug and error messages generated by Squid. If you build your Squid with vbulletin overridden by default with RunCache, or if you run it with the -s tell it to line option, some text will be copied to your syslog settings. It is a private matter whether the alternatives use a separate file for Squid log data.
    • /var/log/squid/store.log: store.log includes a folder with items that are currently stored on the hard drive or, alternatively, have been deleted. As an inexpensive type of transaction log, it is commonly used for debugging purposes. A definitive statement about whether there is something on your disks is possible only after analyzing the entire log file. Stopping (deleting) an object can only be recorded at the moment of our movement (writing to disk).

    How Can I View The Squid Log / Protocol Files?

    centos squid error log

    Standard UNIX / Linux commands such as grep / tail can be used to display calendar files. You will also need to be logged in as root and run sudo to view the log files.

    Show Live Recording Files

    Use fees like this:
    # tail -f /var/log/squid/access.log
    OR
    $ sudo bottom -f /var/log/squid/access.log

    Find Log Files

    Show File Files

    Finally, you can use a text editor like while vi to view the log files:
    # test template / var / log / squid / access. log

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    Squid Log Files

    Logs are definitely a great source of information about Squid and workloads. The logs record not only calls, but also information, system errors and resource consumption (for example, RAM, hard disk space). There are several filesThe logs that Squid. Some must be explicitly enabled at compile time, others can be safely disabled at runtime.

    All test files have a few things in common. Unless otherwise noted, the timestamps written to the log files are usually UTC seconds. The start timestamp usually includes milliseconds.

    cache.log

    The manual cache.log file contains debug and error information generated by Squid. Running Squid with the -s command line response will return copies of some of the messages to your syslog settings. Using each different file type for Squid Log bandwidth is definitely a matter of personal preference.

    The cache.File log does not offer much in the area of ​​automatic parsing of log files. Typically you look in this file for automatic error messages, Squid programming, testing new features, or even the reasons for the supposed amount you went through, etc.

    Squid News

    Error messages come in many forms. Debug traces do not saturateat level 0 or 1. These levels are reserved for important and very important administrative messages.

    • FATAL messages indicate which experts claim the problem killed the Squid process. Affects all current client traffic that is delivered to this Squid instance.

      • If they appear when starting or configuring a Squid step, you must of course fix them before you can start Squid.

    • ERROR messages indicate a serious problem that aborted one user’s transaction and could indirectly affect other clients. But “did not completely stop all traffic services.

      • This can still occur when starting or configuring Squid components. In this case, all service actions that this component would provide will not be performed while they are allowed and Squid reconfigured.
      • NOTE: Some zero-level logging error messages inherited from older versions of Squid do not have a prioritization tag.

    • WARNING messages indicate problems that can cause problems with the client,but Squid can be used automatically. They usually only display from log level 1.

      • NOTE. Some protocol level 1 warning messages from older versions of Squid do not have a tag priority.

    • SECURITY ERROR messages indicate a problem handling the client request using the precautions that were used to configure Squid. An impossible condition is to pass the safety test.

      • This often happens when checking whether a programmatic request will be accepted due to certain response details that will not be widely available until the future.

    • SECURITY ALERT messages indicate detected security attack situations. This only applies to obvious health problems. “Attacks” whose signatures easily appear in normal traffic are recorded as normal WARNINGS.

      • A complete solution to this problem usually requires the client to be locked in place, which may not be possible.
      • Administrative workarounds (additional firewall program rules, etc.) can help with Squid to reduce the damage to network performance.
      • Attack detection may seem pretty critical, but it happens at level 1 because Squid also has a workaround that it can actually do anyway.

    • SECURITY INSTRUCTIONS may appear during and after migration at startup to indicate security issues when configuring the configuration file. These packages contain tips for better customization where possible, and an indication of what Squid will do instead of this customized action.

    Some of the constantly questioned messages and their meanings are described in the knowledge base:

    access.log

    Most test file scanning programs are based on entries in the access.log.

    Squid-2.7 and Squid-3.2 allow administrators to customize their log file format and log output method with great flexibility. Earlier versions offered very limited functionality.

    Squid Result Codes

    The final Squid code consists of multiple tag clouds (separated by n “ Strikethrough ”) that describe the solution sent to the client. Author

    • such a tag still exists to describe how it was delivered:

      TCP

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      • Requests for the HTTP port (usually 3128).

      centos squid error log

      UDP

      Send requests over the ICP port (usually 3130) or HTCP (usually 4128). If ICP logging is disabled using the log_icp_queries parameter, ICP responses are not logged.

      NO

      Squid gave an unusual answer or didn’t answer at all. Appears due to Cachemgr requests and errors, usually when a transaction fails before it is categorized into one of the above results. Also saw views with CONNECT queries.

    • These tags have always been optional and describe why the appropriate finalization was performed or why

       

       

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