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Squid Server

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Sumant Garg
Sumant Garg

This Ppt contains some details about squid server, Linux must see it once.

Tecnologia
1 de 25
What is Squid?
Other proxies
What is a proxy?
What is a caching proxy?
How proxies work (configuration)
Setup Proxy In Browser
How proxies work (user request)
Cacheable objects
Non-cacheable objects
Transparent proxying
Transparent proxying
Squid hardware requirements
∗ 1.x and 1.NOVM.x ∗ No longer supported ∗ Entire cache lost if even one disk in cache fails ∗ Doesn’t understand Cache-Control: tag ∗ Other problems ∗ Bottom line: don’t use them Squid distributions (versions)
∗ 2.0, 2.1, 2.2 ∗ Redesigned disk storage algorithm much improved ∗ Understands Cache-Control: tag ∗ Better LRU/refresh rule engine ∗ Supports proxy authentication ∗ See documentation for full list of enhancements ∗ Recommendation: 2.1 is fairly stable, but move to 2.2 when 2.2STABLE released Squid distributions (versions)
∗ acl manager proto cache_object ∗ acl localhost src 127.0.0.1/32 ∗ acl managerhost src 204.248.51.34/32 ∗ acl managerhost src 204.248.51.39/32 ∗ acl managerhost src 204.248.51.40/32 ∗ acl cawtech src 204.248.51.0/24 ∗ acl cawtech-internal src 172.16.0.0/16 ∗ acl all src 0.0.0.0/0.0.0.0 squid.conf ACL example
∗ acl SSL_ports port 443 563 ∗ acl gopher_ports port 70 ∗ acl wais_ports port 210 ∗ acl whois_ports port 43 ∗ acl www_ports port 80 81 ∗ acl ftp_ports port 21 ∗ acl Safe_ports port 1025-65535 ∗ acl CONNECT method CONNECT ∗ acl FTP proto FTP ∗ acl HTTP proto HTTP ∗ acl WAIS proto WAIS ∗ acl GOPHER proto GOPHER ∗ acl WHOIS proto WHOIS squid.conf ACL example
∗ http_access deny manager !localhost !managerhost ∗ http_access deny CONNECT !SSL_ports ∗ http_access deny HTTP !www_ports !Safe_ports ∗ http_access deny FTP !ftp_ports !Safe_ports ∗ http_access deny GOPHER !gopher_ports !Safe_ports ∗ http_access deny WAIS !wais_ports !Safe_ports ∗ http_access deny WHOIS !whois_ports !Safe_ports ∗ http_access allow localhost ∗ http_access allow cawtech ∗ http_access allow cawtech-internal ∗ http_access deny all squid.conf ACL example
∗ File we Edit for Sqid /etc/squid/squid.conf ∗ acl mysurfers srcdomain .facebook.com ∗ acl teachers src 192.168.1.0/255.255.255.0 ∗ acl students src 192.168.7.0-192.168.9.0/255.255.255.0 ∗ acl lunch time MTWHF 12:00-15:00 ∗ http_access deny localhost ∗ http_access allow teachers ∗ http_access allow students lunch time ∗ http_access deny all ∗ visible_hostname machine-name ∗ http_port 3128 ∗ cache_dir ufs /var/spool/squid 1000 16 256 ∗ cache_access_log /var/log/squid/access.log Sample proxy auto-configuration
Advantages of Squid
Advantages of Squid
Advantages of Squid
Squid Server

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Squid Server

  • 1.
  • 4. What is a proxy?
  • 5. What is a caching proxy?
  • 6. How proxies work (configuration)
  • 7. Setup Proxy In Browser
  • 8. How proxies work (user request)
  • 11.
  • 15. ∗ 1.x and 1.NOVM.x ∗ No longer supported ∗ Entire cache lost if even one disk in cache fails ∗ Doesn’t understand Cache-Control: tag ∗ Other problems ∗ Bottom line: don’t use them Squid distributions (versions)
  • 16. ∗ 2.0, 2.1, 2.2 ∗ Redesigned disk storage algorithm much improved ∗ Understands Cache-Control: tag ∗ Better LRU/refresh rule engine ∗ Supports proxy authentication ∗ See documentation for full list of enhancements ∗ Recommendation: 2.1 is fairly stable, but move to 2.2 when 2.2STABLE released Squid distributions (versions)
  • 17. ∗ acl manager proto cache_object ∗ acl localhost src 127.0.0.1/32 ∗ acl managerhost src 204.248.51.34/32 ∗ acl managerhost src 204.248.51.39/32 ∗ acl managerhost src 204.248.51.40/32 ∗ acl cawtech src 204.248.51.0/24 ∗ acl cawtech-internal src 172.16.0.0/16 ∗ acl all src 0.0.0.0/0.0.0.0 squid.conf ACL example
  • 18. ∗ acl SSL_ports port 443 563 ∗ acl gopher_ports port 70 ∗ acl wais_ports port 210 ∗ acl whois_ports port 43 ∗ acl www_ports port 80 81 ∗ acl ftp_ports port 21 ∗ acl Safe_ports port 1025-65535 ∗ acl CONNECT method CONNECT ∗ acl FTP proto FTP ∗ acl HTTP proto HTTP ∗ acl WAIS proto WAIS ∗ acl GOPHER proto GOPHER ∗ acl WHOIS proto WHOIS squid.conf ACL example
  • 19. ∗ http_access deny manager !localhost !managerhost ∗ http_access deny CONNECT !SSL_ports ∗ http_access deny HTTP !www_ports !Safe_ports ∗ http_access deny FTP !ftp_ports !Safe_ports ∗ http_access deny GOPHER !gopher_ports !Safe_ports ∗ http_access deny WAIS !wais_ports !Safe_ports ∗ http_access deny WHOIS !whois_ports !Safe_ports ∗ http_access allow localhost ∗ http_access allow cawtech ∗ http_access allow cawtech-internal ∗ http_access deny all squid.conf ACL example
  • 20. ∗ File we Edit for Sqid /etc/squid/squid.conf ∗ acl mysurfers srcdomain .facebook.com ∗ acl teachers src 192.168.1.0/255.255.255.0 ∗ acl students src 192.168.7.0-192.168.9.0/255.255.255.0 ∗ acl lunch time MTWHF 12:00-15:00 ∗ http_access deny localhost ∗ http_access allow teachers ∗ http_access allow students lunch time ∗ http_access deny all ∗ visible_hostname machine-name ∗ http_port 3128 ∗ cache_dir ufs /var/spool/squid 1000 16 256 ∗ cache_access_log /var/log/squid/access.log Sample proxy auto-configuration
  • 21.