Squid Proxy Server 安裝設定 [Jonathan's Wiki 筆記]

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====== Squid Proxy Server 安裝設定 ======

<WRAP center round important 60%>
  * 因為在 OpenVAS 主機弱掃會出現 **Squid Multiple 0-Day Vulnerabilities (Oct 2023)**
  * 目前改用 [[tech/tinyproxy]] 來替代 Squid
</WRAP>

====== 使用 docker compose 方式 =====
  * 採用 [[https://hub.docker.com/r/ubuntu/squid|ubuntu/squid 版本]] <cli>
vi docker-compose.yml
</cli><file>
services:
  squid:
    image: ubuntu/squid:latest
    hostname: squid
    container_name: squid
    environment: 
      - TZ=Asia/Taipei
    ports:
      - 3128:3128
    # volumes:
    #   - './conf/squid.conf:/etc/squid/squid.conf:ro'
    #   - './conf/passwords:/etc/squid/passwords:ro'
    restart: always
</file><cli>
docker compose up -d
</cli>
  - 將 squid.conf 掛出來進行後續設定編輯 <cli>
mkdir -p conf
docker cp squid:/etc/squid/squid.conf ./conf/
</cli>
  - 修改 docker-compose.yml <file>
services:
  squid:
    image: ubuntu/squid:latest
    hostname: squid
    container_name: squid
    environment:
      - TZ=Asia/Taipei
    ports:
      - 3128:3128
    volumes:
      - './conf/squid.conf:/etc/squid/squid.conf:ro'
    #   - './conf/passwords:/etc/squid/passwords:ro'
    restart: always
</file>
  - 修改 squid.conf <cli>
vi ./conf/squid.conf</cli><file>
:
acl localnet src fe80::/10              # RFC 4291 link-local (directly plugged) machines

acl SSL_ports port 443 8006
acl Safe_ports port 8006        # PVE manager
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
:
# For example, to allow access from your local networks, you may uncomment the
# following rule (and/or add rules that match your definition of "local"):
http_access allow localnet
:
</file>
  * 重新啟動 docker compose <cli>
docker compose restart
</cli>

==== Q1 : 如果要修改 container 內的 /etc/hosts ====
  * 參考 - https://stackoverflow.com/questions/74014600/custom-etc-hosts-file-in-dockerfile
  - 將 docker-compose.yml 內加上 extra_hosts:
  - 加上要指定的 hostname 與 IP 資訊 Exp. "www.ichiayi.com:192.168.11.133" "web.ichiayi.com:192.168.11.134"
  - 範例如下:<file>
services:
  squid:
    image: ubuntu/squid:latest
    hostname: squid
    container_name: squid
    environment:
      - TZ=Asia/Taipei
    extra_hosts:
      - "www.ichiayi.com:192.168.11.133" 
      - "web.ichiayi.com:192.168.11.134"
    ports:
      - 3128:3128
    volumes:
      - './conf/squid.conf:/etc/squid/squid.conf:ro'
    #   - './conf/passwords:/etc/squid/passwords:ro'
    restart: always
</file>
  - 重啟 docker compose <cli>
docker compose up -d
</cli>


====== 一般安裝程序 ======
以下是在 CentOS 7 與 Ubuntu 20.04 底下安裝與設定 Squid Proxy Server
==== Ubuntu 20.04 ====
<cli>
sudo -i
apt install squid
apt list -a squid
</cli>
<cli>
root@iiidevops1:~# apt list -a squid
Listing... Done
squid/focal-updates,focal-security,now 4.10-1ubuntu1.2 amd64 [installed]
squid/focal 4.10-1ubuntu1 amd64
</cli>

==== CentOS 7 ====
<cli>
su - root
yum install -y squid httpd-tools
</cli>
<cli>
[root@ct-squid ~]# rpm -q squid
squid-3.5.20-12.el7.x86_64
</cli>

===== 設定參數檔 =====
  * 允許 ftp 的 Proxy 功能
  * 允許 https 使用 port 7443 的 SSL Proxy 功能
  * 允許 Google Talk 使用 port 5222 的 http Proxy 功能
  * 假設指定只有 來自 61.67.71.0/24 與 220.130.131.238 的 IP 範圍才可以使用
  * 允許接受 SVN 的延伸指令 REPORT MERGE MKACTIVITY CHECKOUT

<code |h vi /etc/squid/squid.conf>
:
ftp_user wwwuser@ichiayi.com
:
acl SSL_ports port 443 7443
:
acl Safe_ports port 443		# https
acl Safe_ports port 7443	# https-g2b2c
acl Safe_ports port 5222	# GoogleTalk
:
acl our_networks src 61.67.71.0/24 220.130.131.238/32
http_access allow our_networks
:

</code>

  * 如果要讓所有的 IP (公開的 proxy) 都可存取, 可以增加以下的設定<file>
:
# all networks
acl all_networks src all
:
# allow all
http_access allow all_networks

# And finally deny all other access to this proxy
:
</file>

  * 如果需要設定 Proxy 使用者的帳號密碼, 就執行以下這部分<cli>
vi /etc/squid/squid.conf
</cli><file>

:
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd
:
acl password proxy_auth REQUIRED
http_access allow password
:
</file>
  * 第一次建立帳號<cli>
htpasswd -c /etc/squid/passwd jonathan
</cli>
  * 之後建立帳號或修改密碼<cli>
htpasswd /etc/squid/passwd tryweb
</cli>

===== 第一次啟動與設定自動啟動 =====
<cli>
systemctl restart squid.service
systemctl enable squid.service
</cli>

<WRAP center round tip 60%>
  * 要瞭解 Proxy 被存取狀況可以看  /var/log/squid/access.log 內容紀錄
  * 通常無法正常啟動可以依據 systemctl status squid.service 的顯示看到問題與解決方案
</WRAP>

===== 相關參考資料 =====
  * http://spyker729.blogspot.com/2011/01/ubuntusquid-proxy-server.html
  * https://hub.docker.com/r/ubuntu/squid
  * https://www.gushiciku.cn/pl/pXRg/zh-tw

{{tag>squid proxy 安裝}}