Original issue: BUG-134040 Reproduction steps: Given: You have a working SOCKS5 proxy which is prepared to proxy Second Life traffic. Attempt to configure a SOCKS5 proxy via Preferences -> Setup -> Adjust proxy settings . Attempt to use Second Life Expected: The viewer is able to proxy UDP traffic through SOCKS5 Actual: Proxy does not work Note, this problem appears to be from a race condition when performing a handshake between the proxy and viewer. This may succeed on some machines and fail on others.