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

Page 548 highlights

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

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22 Problem Solving
Cause
Remedy
Cannot access the proxy server,
The following types of access control are used. Confirm the
firewall, or Web server as a
configured access control.
result of 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
Remedy
The setting to use the proxy
server is not configured.
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.
The setting to use a proxy
server is configured even
though the environment does
not use a 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.
The proxy server address is
incorrect.
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.
When the proxy server access
requires authentication, you
cannot connect to the server
because the user name or
password is incorrect.
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