Dell C5765DN Dell Color Laser Multifunction Printer User's Guide - Page 548
IPv4 and IPv6 Connection Problems, When connection to a desired Web server fails
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22 Problem Solving Cause Remedy Cannot access the proxy server, firewall, or Web server as a result of access control. The following types of access control are used. Confirm the configured access control. • Address (port) restriction • SSL restriction • User access restriction (including access right levels) • Content block • Scheme restriction (cannot use HTTP etc.) • Transfer data size restriction • Method restriction (cannot use POST etc.) • HTTP header restriction (only accepting specified browsers etc.) • Time restriction (only available during a specific period of time etc.) When connection to a desired Web server fails Cause The setting to use the proxy server is not configured. The setting to use a proxy server is configured even though the environment does not use a proxy server. The proxy server address is incorrect. When the proxy server access requires authentication, you cannot connect to the server because the user name or password is incorrect. Remedy In the environment using the proxy server, you must configure the machine to use the proxy server to connect to a desired Web server. Make sure that you configure the settings to use the proxy server. In an environment that does not use a proxy server, such as when connecting to an intranet, do not make the settings to use the proxy server. When the settings to use a proxy server are configured, you cannot connect to a desired Web server if the IP address of the proxy server is wrong. Set the correct IP address of the proxy server. Set the user name and password on the machine that allow connection to the proxy server. IPv4 and IPv6 Connection Problems The possible causes and remedies for problems when using an IPv4 or IPv6 address are as follows: Unable to connect using an IPv4 address Symptom Remedy When 0 (zero) is prepended to the head of a value for the IPv4 address (for example: 192.0.2.010), connection fails. Do not prepend 0 (zero) to each value of an IPv4 address. 548