Squid Agent service for Linux

I. Squid INTRODUCTION

Proxy Server English full name is proxy server, its function is proxy network users to obtain network information. Squid is a software that caches Internet data, receives a user's download request, and automatically processes the downloaded data. When a user wants to download a homepage, they can send a request to squid to download it instead, then squid connects to the requested website and requests the homepage, and then passes the page to the user while keeping a backup, and when other users apply for the same page, squid The saved backups are immediately passed on to the user, making the user feel quite fast. Squid can proxy http, FTP, GOPHER, SSL and WAIS protocols and squid can be processed automatically, you can set the squid according to their own needs, so that they filter out the unwanted things.

Two. Installation Environment

1. The service machine needs to configure the dual network card

172.25.254.128 and 172.25.28.128 two network segments

2. Client Configuration single NIC

172.25.28.228 Network Segment

3. Install Squid Service and httpd service in the service machine

Three. Forward parsing

1. Install Squid service Yum install squid-y

Systemctl start Squid

Systemctl Stop Firewalld

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Netstat-antlpe | grep squid

View Squid Port

2. Edit the configuration file vim/etc/squid/squid.conf

Http_access allow everyone to access

Http_port 3128 Access Port 3128

Cache_dir UFS/VAR/SPOOL/SQUID 100 16 256 cache file directory, 16 file number, 256 size

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Systemctl Restart Squid

3. Testing

In the client browser:

Edit---->preferences---->advanced---->network---->settings

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Manuak Proxy Configurantion

Manually set up the agent on the client 172.25.28.228

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The client 172.25.28.228 is different from the 172.25.254.128 network segment, but the 172.25.28.128 (dual NIC) proxy can access the Web page to 172.25.254.128

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Four. Reverse Proxy

Access to different IP from the same domain, easing access pressure

1. Edit the configuration file vim/etc/squid/squid.conf

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Cache points to 172.25.254.221, port 80

2. Turn off the agent on the client 172.25.28.228

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3. Turn off the HTTPD service on the server (dual NIC)

4. Enter 172.25.28.128 on the server to access the Web page on 172.25.254.221, the server 172.25.28.128 look at the cache on 221

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Squid Agent service for Linux