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example_configs: Add squid

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README.md
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@ -285,6 +285,7 @@ folder for help with:
- [Rancher](example_configs/rancher.md)
- [Seafile](example_configs/seafile.md)
- [Shaarli](example_configs/shaarli.md)
- [Squid](example_configs/squid.md)
- [Syncthing](example_configs/syncthing.md)
- [Vaultwarden](example_configs/vaultwarden.md)
- [WeKan](example_configs/wekan.md)

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example_configs/squid.md Normal file
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# Squid
[Squid](http://www.squid-cache.org/) is a caching HTTP/HTTPS proxy.
This guide will show you how to configure it to allow any user of the group `proxy` to use the proxy server.
The configuration file `/etc/squid/squid.conf`
```
auth_param basic program /usr/lib/squid/basic_ldap_auth -b "dc=example,dc=com" -D "uid=admin,ou=people,dc=example,dc=com" -W /etc/squid/ldap_password -f "(&(memberOf=uid=proxy,ou=groups,dc=example,dc=com)(uid=%s))" -H ldap://IP_OF_LLDAP_SERVER:3890
acl localnet src 0.0.0.1-0.255.255.255 # RFC 1122 "this" network (LAN)
acl localnet src 10.0.0.0/8 # RFC 1918 local private network (LAN)
acl localnet src 100.64.0.0/10 # RFC 6598 shared address space (CGN)
acl localnet src 169.254.0.0/16 # RFC 3927 link-local (directly plugged) machines
acl localnet src 172.16.0.0/12 # RFC 1918 local private network (LAN)
acl localnet src 192.168.0.0/16 # RFC 1918 local private network (LAN)
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access deny manager
include /etc/squid/conf.d/*.conf
http_access allow localhost
acl ldap-auth proxy_auth REQUIRED
http_access allow ldap-auth
# http_access deny all
http_port 3128
coredump_dir /var/spool/squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern \/(Packages|Sources)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
refresh_pattern \/Release(|\.gpg)$ 0 0% 0 refresh-ims
refresh_pattern \/InRelease$ 0 0% 0 refresh-ims
refresh_pattern \/(Translation-.*)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
refresh_pattern . 0 20% 4320
```
The password for the binduser is stored in `/etc/squid/ldap_password` e.g.
```
PASSWORD_FOR_BINDUSER
```
After you restart squid with `systemctl restart squid` check it is working with
```
curl -O -L "https://www.redhat.com/index.html" -x "user_name:password@proxy.example.com:3128"
```