We have updated our Artifactory from 5.2.0 to 5.10.2. Since that, all remote repository test connection failed with Proxy error 407.
The proxy is correctly set in Admin section, the Proxy has been set for all repo. login/password are valid.
There's no log error except this one :
20180419151212|30|REQUEST|172.22.50.135|usertst|POST|/ui/admin/repositories/testremote|HTTP/1.1|400|1610
Unfortunately I can't bypass the proxy.
It used to work so I don't understand why it doesn't work anymore since the update.
This is a bug that has been reported. You may want to vote & watch the JIRA for updates.