Where do I configure my client proxy settings?

Configure proxy settings in the servers file (created when Subversion is installed on your system).

The server file is created when you install TortoiseSVN, Eclipse or command-line Subversion. Use the appropriate path from the installation folder to configure proxy settings:

CLI Unix/Linux /home/<username>/.subversion/servers
CLI Windows C:\Documents and Settings\<username>\Application Data\Subversion\servers
Eclipse Window > Preferences > General > Network Connections
IE (6/7) Tools > Options > Advanced Network > Connection Settings
Firefox Tools > Internet Options > Connections tab > LAN Settings
TortoiseSVN Windows Explorer > File > TortoiseSVN > Settings > Network (by default, TSVN uses browser proxy settings)