North Sydney library patrons and staff hoping to search for books or use the internet this week are out of luck, as the library's IT network, known as Shorelink, went down.
The Shorelink Library Network, a consortium of five public libraries on Sydney's lower North, has been down since Sunday 10 April, and affected wireless, internet and library management systems.
"It is believed to be a problem with the Websense proxy server at the data centre which hosts the server," a North Sydney Council spokeswoman said in a statement.
"Shorelink is working with our IT provider Bluefire to identify and rectify the problem."
The network utilises a shared IT infrastructure, which includes information about library holdings such as books, ebooks, music and DVDs.
Shorelink is used by five councils, which are Lane Cove, Manly, Mosman, North Sydney and Willoughby councils.
The network was still down as of today.
In a statement, a Websense spokesperson said that no component of the vendor's equipment had caused the system to crash within the Shorelink Library Network.
"However, Websense is offering its continued technical support to rectify this internal administration error," he said.
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