https://multiproxy.org/txt_all/proxy.txt
https://www.my-proxy.com/free-socks-4-proxy.html
https://www.proxy-list.download/SOCKS4
https://openproxy.space/list
https://api.proxyscrape.com/v2/?request=getproxies&protocol=socks4&timeout=10000&country=all&simplified=true
http://free-proxy.cz/en/proxylist/country/all/socks4/ping/all
https://hideip.me/en/proxy/socks4list
https://raw.githubusercontent.com/TheSpeedX/SOCKS-List/master/socks4.txt
https://www.proxyscan.io/download?type=socks4
https://www.freeproxychecker.com/result/socks4_proxies.txt
https://cracking.org/search/411690/?q=socks4&o=relevance
https://cracked.to/Forum-Proxies?sortby=lastpost&order=desc&datecut=20&prefix=19
http://www.proxylists.net/socks4.txt
https://premproxy.com/socks-list/
https://raw.githubusercontent.com/clarketm/proxy-list/master/proxy-list-raw.txt
https://api.getproxylist.com/proxy?protocol[]=socks4
https://api.proxyscrape.com/v2/?request=getproxies&protocol=http&timeout=10000&country=all&ssl=all&anonymity=anonymous&simplified=true
https://openproxy.space/list
https://www.proxyscan.io/download?type=http
http://free-proxy.cz/en/proxylist/country/all/http/ping/level2
https://www.proxy-list.download/HTTP
https://hideip.me/en/proxy/httplist
https://www.freeproxychecker.com/result/http_proxies.txt
https://api.getproxylist.com/proxy?protocol[]=http
http://www.proxyserverlist24.top/feeds/posts/default
http://rootjazz.com/proxies/proxies.txt
http://best-proxy.com/english/search.php?search=anonymous-and-elite.ssl-no&country=any&type=anonymous-and-elite&port=any&ssl=no
https://cracking.org/search/412364/?q=HTTP&o=relevance

上面這些網站，打開之后就能提取代理ip，因為是免費的質量比較差。勉強能用，發出來就是為了配合這個文章用：https://www.cunshao.com/4318.html