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<p>QGIS doesn't use username and password inserted in the "options dialog" for proxy connections, to use with WMS connections.<br>
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This problem affects 1.6.0 and trunk versions, on Linux and Windows.<br>
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In the SQUID log, I see this when I try to connect to NASA WMS with Qgis:<br>
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1306326384.090 1 192.168.11.118 TCP_DENIED/407 1987 GET <a href="http://onearth.jpl.nasa.gov/browse.cgi?">http://onearth.jpl.nasa.gov/browse.cgi?</a> - NONE/- text/html<br>
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as you see, the username is not sent.<br>
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If I use the browser (Firefox 3.6) with the same url:<br>
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1306326543.606 446 192.168.11.118 TCP_MISS/200 1385 GET <a href="http://onearth.jpl.nasa.gov/browse.cgi?">http://onearth.jpl.nasa.gov/browse.cgi?</a> manganelll DIRECT/onearth.jpl.nasa.gov text/html<br>
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this is correct (manganelll is my username).<br>
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I remember that in previous versions of QGIS this was working.</body></html>