Squid Proxy Server 安裝設定

因為在 OpenVAS 主機弱掃會出現 Squid Multiple 0-Day Vulnerabilities (Oct 2023)
目前改用 TinyProxy Server 安裝設定來替代 Squid

vi docker-compose.yml

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

docker compose up -d

將 squid.conf 掛出來進行後續設定編輯

mkdir -p conf
docker cp squid:/etc/squid/squid.conf ./conf/

修改 docker-compose.yml

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

修改 squid.conf

vi ./conf/squid.conf

:
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
:

重新啟動 docker compose
```
docker compose restart
```

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:

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

重啟 docker compose
```
docker compose up -d
```

以下是在 CentOS 7 與 Ubuntu 20.04 底下安裝與設定 Squid Proxy Server

sudo -i
apt install squid
apt list -a squid

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

su - root
yum install -y squid httpd-tools

[root@ct-squid ~]# rpm -q squid
squid-3.5.20-12.el7.x86_64

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

vi /etc/squid/squid.conf

:
ftp_user [email protected]
:
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
:

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

:
# all networks
acl all_networks src all
:
# allow all
http_access allow all_networks

# And finally deny all other access to this proxy
:

如果需要設定 Proxy 使用者的帳號密碼, 就執行以下這部分

vi /etc/squid/squid.conf

:
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd
:
acl password proxy_auth REQUIRED
http_access allow password
:

第一次建立帳號
```
htpasswd -c /etc/squid/passwd jonathan
```
之後建立帳號或修改密碼
```
htpasswd /etc/squid/passwd tryweb
```

systemctl restart squid.service
systemctl enable squid.service

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

squid, proxy, 安裝

Squid Proxy Server 安裝設定

使用 docker compose 方式

Q1 : 如果要修改 container 內的 /etc/hosts

一般安裝程序

Ubuntu 20.04

CentOS 7

設定參數檔

第一次啟動與設定自動啟動

相關參考資料