D-Link has been known to roll out some fairly significant firmware updates
for its routers in the past, and while this latest won't exactly breath new life into your old clunker, it does at least break a tiny bit of new ground in its own little way. While the company is obviously quick to point out that its routers are already some of the most secure around, it apparently thought they could still do with a bit of added protection, so it's now added some annoying but reliable CAPTCHA tests to a number of its existing models. That includes the DIR-615, DIR-625, DIR-628, DIR-655, DIR-825, DIR-855, DIR-685, and DGL-4500, which can each be upgraded with the new firmware that's now freely available on D-Link's website, and will no doubt become standard issue on all future D-Link routers.
[Via Engadget Spanish