What Is an Error Code?

Error (error) refers to a phenomenon in which software and hardware cannot operate normally when people use software and hardware. Because there are many types of errors, in order to distinguish between errors, the system sets an error code. If an error occurs during the operation of software and hardware, it will be judged and identified through its original settings and an error code. The display mode is provided to the operator. The operator can identify the specific reason why the software and hardware cannot operate normally by identifying the error code.

For example, common error codes are

Some simple ways to deal with error 678/651/815

First of all, you can suggest that the user try to restart the PC (computer) or MODEM to eliminate the accidental failure of the user's PC or MODEM.

Check the lighting status of the modem:

Step 1: Check whether the power light is normal. Turn to the second step stably. If it is off, the user may forget to turn on the MODEM power switch, plug in the power cord, or the power regulator is loose. After instructing the user to adjust, if it still does not work, it belongs to MODEM.

Step 2: Check whether the DSL light is on normally. If it is steady on, go to step 3. If the DSL light keeps flashing, it means that the ADSL line is being connected or cannot be connected all the time. This is a line problem. The most common case is the user's splitter incoming line and receiving a call. The wrong port is connected. At this time, you can instruct the user to check the splitter, change the wiring port, and then check whether the indoor telephone line connector is in poor contact, or cancel the splitter, directly connect the household line to the modem, and then restart the modem. Still can not solve the problem. Check the outside line. ;

Step 3: Check the LAN light. If it is not on, go to Step 4. If it is steady on, there may be a problem with the dial-up software of the computer. It is recommended that users reinstall the dial-up software and still cannot solve the problem.

Step 4: If the LAN light is off, it is the connection between the modem and the computer. Please re-plug the network cable from the modem to the computer. If the problem still cannot be solved, check the order.

Some simple methods of error 691/619/629

Errors 691/619/629 are mostly caused by inconsistent account passwords, arrears, account hangs, or port errors.

Some simple handling of error 769/797

Error 769/797 is usually a disabled network card or a problem with the driver (XP system is 769, windows2000 system is 797).

Solution: For my computer on the desktop, click on the properties of my computer hardware (this step is not available on 98 systems) device manager network adapter. If the network adapter has a red cross ×, double-click the red cross and then click "Enable". The second is that the network adapter is marked with a yellow question mark or exclamation mark, which means that the computer cannot recognize the network card, which may be a problem with the driver of the network card. It is recommended that users reinstall the network card driver. The third is that the network adapter cannot be found in the device manager, which means that the computer cannot find the network card, which is generally a problem with the network card. It is recommended that the user reseat the network card or ask the computer company to handle it (because the network card is in the host, if the user does not Familiar, please guide users to find a computer company to deal with).

No error code:

It is recommended that users try to restart the PC (computer) or MODEM to eliminate accidental failure of the user's PC or MODEM. First of all, first confirm whether the user uses routing. If using routing, it is recommended that users temporarily cancel the routing and switch to stand-alone dial-up Internet testing (because the use of routing does not require dialing, so the error code will not be reflected). If there is no error code, please check whether the light of the modem is normal. If the modem lights are on normally, please check whether the local connection in the lower right corner of the computer is connected. If the local connection prompts that the local cable is not plugged in, do not indicate that the line is not connected, and then replug the network cable. Processed according to 691 ^[2]

Summary of the meaning of IIS status codes

When a user attempts to access content on a server running Internet Information Services (IIS) via HTTP or File Transfer Protocol (FTP), IIS returns a numeric code indicating the status of the request. This status code is recorded in the IIS log and may also be displayed in a web browser or FTP client. The status code can indicate whether the specific request was successful, and can reveal the exact reason why the request failed. More information

Location of log files

By default, IIS places its log files in the% WINDIR \ System32 \ Logfiles folder. Each World Wide Web (WWW) site and FTP site has a separate directory under this directory. By default, log files are created in these directories every day, and log files are named with dates (for example, exYYMMDD.log).

HTTP

1xx-Information

Represents a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.

100-continued.

101-Switch protocol.

2xx- success

Indicates that the server successfully accepted the client request.

200-OK. The client request was successful.

201-Created.

202-Accepted.

203-Non-authoritative information.

204-No content.

205-Reset content.

206-Partial content.

3xx-redirect

The client browser must take more action to fulfill the request. For example, the browser may have to request a different page on the server or repeat the request through a proxy server.

301-The object has been permanently removed, ie it is permanently redirected.

302-The object has been temporarily moved.

304-Not modified.

307-Temporary redirect.

4xx-client error

An error occurred and the client appears to be having problems. For example, the client requests a page that does not exist, and the client did not provide valid authentication information. 400-Bad request.

401-Access is denied. IIS defines many different 401 errors, which indicate more specific error causes. These specific error codes are displayed in the browser, but not in the IIS logs:

401.1-Login failed.

401.2-Server configuration causes login failure.

401.3-Unauthorized due to ACL restrictions on resources.

401.4-Filter authorization failed.

401.5-ISAPI / CGI application authorization failed.

401.7-Access is denied by a URL authorization policy on the web server. This error code is specific to IIS 6.0.

403-Forbidden: IIS defines many different 403 errors, which indicate more specific reasons for the error:

403.1-Executive access is forbidden.

403.2-Read access is forbidden.

403.3-Write access is forbidden.

403.4-SSL is required.

403.5-Requires SSL128.

403.6-The IP address was rejected.

403.7-Client certificate required.

403.8-Site access is denied.

403.9-Too many users.

403.10-The configuration is invalid.

403.11-Password change.

403.12-Access denied mapping table.

403.13-The client certificate is revoked.

403.14-Reject directory listing.

403.15-Exceeded client access permissions.

403.16-The client certificate is untrusted or invalid.

403.17-The client certificate has expired or is not yet valid.

403.18-The requested URL cannot be executed in the current application pool. This error code is specific to IIS 6.0.

403.19-CGI cannot be performed for clients in this application pool. This error code is specific to IIS 6.0.

403.20-Passport login failed. This error code is specific to IIS 6.0.

404-Not found.

404.0- (none)-No files or directories were found.

404.1-Cannot access the Web site on the requested port.

404.2-Web service extension locking policy prevents this request.

404.3-MIME mapping policy blocks this request.

405-The HTTP predicate used to access this page is not allowed (method is not allowed).

406-The client browser does not accept the MIME type of the requested page.

407-Proxy authentication required.

412-Prerequisite failed.

413-The requesting entity is too large.

414-The request URI is too long.

415Unsupported media type.

416-The requested range cannot be met.

417-Execution failed.

423Locked error.

5xx- server error

The server was unable to complete the request because it encountered an error.

500-Internal server error.

500.12-The application is busy restarting on the web server.

500.13-Web server is too busy.

500.15-Direct requests to Global.asa are not allowed.

500.16UNC authorization credentials are incorrect. This error code is specific to IIS 6.0.

500.18-URL authorization store cannot be opened. This error code is specific to IIS 6.0.

500.100-Internal ASP error.

501-Header value specifies unimplemented configuration.

502-The web server received an invalid response when it was used as a gateway or proxy server.

502.1-CGI application timed out.

502.2-CGI application error. application.

503-Service is unavailable. This error code is specific to IIS 6.0.

504-Gateway timeout.

505-HTTP version is not supported.

FTP

1xx-Yes initial response

These status codes indicate that an operation has started successfully, but the client expects another response before proceeding with the new command.

110 restart mark reply.

120 service is ready to start after nnn minutes.

125The data connection is open and the transfer is starting.

150 file status is normal, ready to open data connection.

2xx-yes complete reply

An operation has completed successfully. The client can execute new commands.

200 commands OK.

202 Command not executed, too many commands on site.

211 System status, or system help reply.

212 Directory status.

213 file status.

214 help message.

215NAME system type, where NAME is the official system name listed in the AssignedNumbers document.

220 The service is ready to perform the request of the new user.

221 Service closed control connection. If appropriate, log out.

225 The data connection is open and no transmission is in progress.

226 Close the data connection. The requested file operation was successful (for example, transferring or discarding a file).

227 enters passive mode (h1, h2, h3, h4, p1, p2).

230 users have logged in and continue.

250 The requested file operation is correct and completed.

257 "PATHNAME" has been created.

3xx-Affirmative intermediate response The command was successful, but the server needs more information from the client to complete the processing of the request.

331 The username is correct and requires a password.

332 requires login account.

350 The requested file operation is waiting for further information.

4xx-Transient negative completion response The command was unsuccessful, but the error was temporary. If the client retries the command, it may succeed.

421 Service is unavailable and the control connection is being closed. If the service determines that it must shut down, it will send this response to any command.

425 Unable to open the data connection.

426Connectionclosed; transferaborted.

450 The requested file operation was not performed. The file is unavailable (for example, the file is busy) ^[3] .