Set Squid user authentication Access Control in Linux

Article Title: Linux sets Squid's user authentication access control. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Kernel: Linux 2.2
Squid version: Squid-2.3.stable2
Http://www.squid-cache.org/Versions/v2/2.3/squid-2.3.STABLE2-src.tar.gz)
Release: Redhat Linux 6.0
　　
1. Download, compile, and install Squid
Note: Run squid as nobody and root cannot be used.
　　
Assume that the squid home directory is/usr/local/squid/
Assume that the squid source directory is in the/tmp/squid-2.3.STABLE2
　　
2 .. # cd/tmp/squid-2.3.STABLE2/auth_modules/NCSA
# Make ncsa_auth
　　
3. Copy the generated execution file ncsa_auth to the squid execution file directory.
# Cp ncsa_auth/usr/local/squid/bin
　　
4. Obtain the program htpasswd from the Apache Software Package.
　　
5. Use htpasswd to generate the user name and password used by Squid to authenticate the database file
　　
# Htpasswd-c/usr/local/squid/etc/passwd
　　
6. Add more users
# Htpasswd/usr/loal/squid/etc/passwd
　　
7. Modify squid. conf and enable ncsa_auth user authentication.
[Root @ linux etc] # more squid. conf | grep ncsa_auth
Authenticate_program/usr/local/squid/bin/ncsa_auth/usr/local/squid/etc/passwd
　　
8. Modify the ACL, as shown below:
[Root @ linux etc] # more squid. conf | grep jephe
Acl isd proxy_auth jephe bob jicon
Http_access allow isd