Ubuntu 16.04
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Set Basic Authentication
2016/06/02
 
Set Basic Authentication and limit squid for users to require authentication.
[1] Install a package which includes htpasswd.
root@prox:~#
apt-get -y install apache2-utils
[2] Configure Squid to set Basic Auth.
root@prox:~#
vi /etc/squid/squid.conf
acl CONNECT method CONNECT
# line 989: add follows for Basic auth

auth_param basic program /usr/lib/squid/basic_ncsa_auth /etc/squid/.htpasswd
auth_param basic children 5
auth_param basic realm Squid Basic Authentication
auth_param basic credentialsttl 5 hours
acl password proxy_auth REQUIRED
http_access allow password
# add a user : create a new file with "-c" (add the "-c" option only for the initial registration)

root@prox:~#
htpasswd -c /etc/squid/.htpasswd ubuntu

New password:    
# set password

Re-type new password:    
# confirm

Adding password for user ubuntu
root@prox:~#
systemctl restart squid
Proxy Client : Ubuntu
[3] Configure Ubuntu Proxy Client for Basic Auth.
root@client:~#
vi /etc/profile
# add follows to the end

# username:password@proxyserver:port

MY_PROXY_URL="http://ubuntu:password@prox.srv.world:3128/"
HTTP_PROXY=$MY_PROXY_URL
HTTPS_PROXY=$MY_PROXY_URL
FTP_PROXY=$MY_PROXY_URL
http_proxy=$MY_PROXY_URL
https_proxy=$MY_PROXY_URL
ftp_proxy=$MY_PROXY_URL
export HTTP_PROXY HTTPS_PROXY FTP_PROXY http_proxy https_proxy ftp_proxy
root@client:~#
source /etc/profile
# it's OK all, but it's possible to set proxy settings for each application like follows

# for apt

root@client:~#
vi /etc/apt/apt.conf
# create new

Acquire::http::proxy "http://ubuntu:password@prox.srv.world:3128/";
Acquire::https::proxy "https://ubuntu:password@prox.srv.world:3128/";
Acquire::ftp::proxy "ftp://ubuntu:password@prox.srv.world:3128/";
# for wget

root@client:~#
vi /etc/wgetrc
# add to the end

http_proxy = http://prox.srv.world:3128/
https_proxy = http://prox.srv.world:3128/
ftp_proxy = http://prox.srv.world:3128/
proxy_user = ubuntu
proxy_passwd = password
Proxy Client : Windows
[4] For Windows Clients, none of specific settings, but when access to a web, proxy server requires authentication like follows, then input username and password.
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