DS-790WN

User's Guide

> Solving Problems > Problems when Preparing Network Scanning > Cannot Access Web Config

Cannot Access Web Config

The IP address is not assigned to the scanner.

Solutions

A valid IP address may not be assigned to the scanner. Configure the IP address using the scanner’s control panel. You can confirm the current setting information from the scanner’s control panel.

Web browser does not support the Encryption Strength for SSL/TLS.

Solutions

SSL/TLS has the Encryption Strength. You can open Web Config by using a web browser that supports bulk encryptions as indicated below. Check you are using the a supported browser.

  • 80bit: AES256/AES128/3DES

  • 112bit: AES256/AES128/3DES

  • 128bit: AES256/AES128

  • 192bit: AES256

  • 256bit: AES256

CA-signed Certificate is expired.

Solutions

If there is a problem with the expiration date of the certificate, "The certificate has expired" is displayed when connecting to Web Config with SSL/TLS communication (https). If the message appears before its expiration date, make sure that the scanner's date is configured correctly.

The common name of the certificate and the scanner do not match.

Solutions

If the common name of the certificate and the scanner do not match, the message "The name of the security certificate does not match···" is displayed when accessing Web Config using SSL/TLS communication (https). This happens because the following IP addresses do not match.

  • The scanner's IP address entered to common name for creating a Self-signed Certificate or CSR

  • IP address entered to web browser when running Web Config

For Self-signed Certificate, update the certificate.

For CA-signed Certificate, take the certificate again for the scanner.

The proxy server setting of local address is not set to web browser.

Solutions

When the scanner is set to use a proxy server, configure the web browser not to connect to the local address via the proxy server.

  • Windows:

    Select Control Panel > Network and Internet > Internet Options > Connections > LAN settings > Proxy server, and then configure not to use the proxy server for LAN (local addresses).

  • Mac OS:

    Select System Preferences > Network > Advanced > Proxies, and then register the local address for Bypass proxy settings for these Hosts & Domains.

    Example:

    192.168.1.*: Local address 192.168.1.XXX, subnet mask 255.255.255.0

    192.168.*.*: Local address 192.168.XXX.XXX, subnet mask 255.255.0.0

DHCP is disabled in the computer's settings.

Solutions

If the DHCP for obtaining an IP address automatically is disabled on the computer, you may not be able to access Web Config. Enable DHCP.

Example for Windows 10:

Open the Control Panel and then click Network and Internet > Network and Sharing Center > Change adapter settings. Open the Properties screen of the connection you are using, and then open the properties screen forInternet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6). Check that Obtain an IP address automatically is selected on the displayed screen.