Originally Posted by hirohitosan
I can browse Internet but I cannot connect through ftp.
In my case I had the same problem with ftp. But I thought the root case of it is ftp works through the Internet directly.
I tried to solve it just set empty FTP field in KDE proxy settings but it does not help. Then I tried to setup proxy using .xprofile for both root & user account, just add next variables:
export HTTP_PROXY="http://<you IP address>:8080"
in case of ftp does not have direct connection try please to add
then reboot to load new environment variables.
Go to Proxy settings and choose load proxy settings from environment variables instead of set up it manually, repeat for root (really for user it is not necessary but do it just in case).
Try run update manager.