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ERROR: "404 - Page cannot be displayed" when launching Biology and Chemistry


Article ID 2948
Product PLATO Web Learning Network
Issue When you try to run Biology or Chemistry Series lessons, the message "404 - Page cannot be displayed" appears on your screen, and the lessons will not run.
Resolution Configure Cisco Pix firewall and content filter

Details

Resolution

The Cisco PIX firewall is blocking the PWLN URL.   The PWLN URL can be extremely long.   When a PIX firewall is configured to work with filtering software, long URLs are truncated by default.

 

To prevent the platoweb.com/platoweb01.com URLs from passing through the filter (i.e. bypass the filter) and send them directly through the Cisco Pix Firewall, enter the following commands in the Cisco Pix Firewall configuration file:

 

Filter URL Except 0.0.0.0 0.0.0.0 63.241.29.0 255.255.255.0 Allow

 

(If you want to add the actual IPs individually and not the whole range they are 0 through 127)

 

Filter URL except http 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 longurl-truncate

 

NOTE: The line above includes four sets of four zeros each, with a space between each set.

 

 

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