Caching proxies were the first kind of proxy server. Squid is a caching and forwarding HTTP web proxy. Wikipedia uses Nginx as its SSL termination proxy. Another useful feature is to proxy SSL connections. Techniques involving a proxy server are also used. CAS allows multi-tier authentication via proxy address. Unlike an SSH tunnel, shadowsocks can also proxy UDP traffic. It is also quite helpful to have dynamic IPs for proxy servers. Tools to do WHOIS proxy searches have become common. A traditional solution is to customize an HTTP proxy (or web proxy) to filter content. Some of advantages of using Proxy chains include scalability improvements, policy implementations and capability adjustments. The support app is nothing more than a proxy on the PC buffering the download. In 2013, researchers began warning about the security risks of proxy auto-config. This is also called transitive proxy or delegate cascade. Hoyte abolished overseas voting and the provisions for widespread proxy and postal voting.