Proxychains

is Article description::force any tcp connections to flow through a proxy (or proxy chain). One of tools used for secure internet connection.

Installation
does not have USE flags right now.

DNS requests
Proxy chains has "proxy_dns" option in /etc/proxychains.conf to prevent "DNS leaks", but this options will work only if application support "Proxy DNS when using socks5", like Firefox has.

To test if application leaks DNS you can use Tcpdump tool.

To block all DNS request for user ff (simple sandbox for Firefox) in nftables: