https://blog.gongquiz.com/2022/11/25/%eb%8b%a4%ec%9d%8c%ec%9d%80-squid-conf-%ed%8c%8c%ec%9d%bc%ec%9d%98-%ec%9d%bc%eb%b6%80%ec%9d%b4%eb%8b%a4-%ea%b4%84%ed%98%b8-%ec%95%88%ec%97%90-%eb%93%a4%ec%96%b4%ea%b0%88-%eb%82%b4%ec%9a%a9/