A Google search reveals that altering DNS settings in this "Telstra-nobbled" router appears to be a common problem.
An UnblockUs reply can be seen at .
Perhaps contacting Telstra BigPond Technical Support via the website will provide the information you require.
I understand why some ISP's use customised software in such devices, but it makes altering the defaults very difficult when more "advanced users" wish to do so.
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