Пример настройки для rutracker /etc/redsocks.conf:

base {
	log_debug = off;
	log_info = on;
	log = "syslog:daemon";
	daemon = on;
	user = redsocks;
	group = redsocks;
	redirector = iptables;
}
redsocks {
	local_ip = 127.0.0.1;
	local_port = 12345;
	ip = 159.203.50.248;
	port = 1080;
	type = socks5;
}

Настройка iptables:

iptables -t nat -A OUTPUT -p tcp --dport 80 -d 195.82.146.120 -j DNAT --to-destination 127.0.0.1:12345
iptables -t nat -A OUTPUT -p tcp --dport 80 -d 195.82.146.121 -j DNAT --to-destination 127.0.0.1:12345
iptables -t nat -A OUTPUT -p tcp --dport 80 -d 195.82.146.122 -j DNAT --to-destination 127.0.0.1:12345
iptables -t nat -A OUTPUT -p tcp --dport 80 -d 195.82.146.123 -j DNAT --to-destination 127.0.0.1:12345
iptables -t nat -A OUTPUT -p tcp --dport 80 -d 195.82.146.125 -j DNAT --to-destination 127.0.0.1:12345

https://rutracker.org/forum/viewtopic.php?p=72678097#72678097