Eduroam with username without @ will end April 28
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As of April 28, it is no longer possible to use the wireless Eduroam network with only a U- or S-number as username, without appending the domain @ru.nl. Until then, this works, but only on RU campus, because the RU RADIUS server then assumed the RADIUS realm @ru.nl. When one uses a username with a RADIUS realm like @ru.nl or @science.ru.nl, one can use Eduroam at all Eduroam connected institutions. How to add the RADIUS realm @ru.nl to your Eduroam settings can be found in the ISC announcement.