Proxy Servers & Firewalls

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Objectives

What is proxy ? Proxy Proxy is hardware / software Indirect access to other networks e.g INTERNET. all computers on the local network have to go through it before accessing information on the Internet. Organization , universities , companies use proxy systems Proxy act as gateway Proxy act as Cache Server/Firewall Proxy share a connection to others LAN INTERNET

Main purpose of using proxies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Improve Performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INTERNET 64 Kbps 128 Kbps 512 Kbps 1 Mbps

Filter Requests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What do you need for proxy installation? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How a proxy works ? ,[object Object]

IP : 172.16.0.2 Gw : 172.16.0.1 IP : 172.16.0.1 IP : 217.219.66.2 Gw : 217.219.66.1 LAN INTERNET Proxy Server Source IP 172.16.0.2 www.yahoo.com Dest IP 209.191.93.52

IP : 172.16.0.2 Gw : 172.16.0.1 IP : 217.219.66.2 Gw : 217.219.66.1 IP : 172.16.0.1 Change Source IP Address LAN INTERNET Proxy Server Source IP 217.219.66.2 www.yahoo.com Dest IP 209.191.93.52 Source IP 172.16.0.2 www.yahoo.com Dest IP 209.191.93.52

IP : 217.219.66.2 Gw : 217.219.66.1 IP : 172.16.0.1 Change Source IP Address & Destination IP Address IP : 172.16.0.2 Gw : 172.16.0.1 LAN INTERNET Proxy Server Source IP 209.191.93.52 Dest IP 217.219.66.2

IP : 217.219.66.2 Gw : 217.219.66.1 IP : 172.16.0.1 Change Dest. IP Address IP : 172.16.0.2 Gw : 172.16.0.1 LAN INTERNET Proxy Server Source IP 209.191.93.52 Dest IP 217.219.66.2 Source IP 209.191.93.52 Dest IP 172.16.0.2

IP : 172.16.0.2 Gw : 172.16.0.1 IP : 217.219.66.2 Gw : 217.219.66.1 IP : 172.16.0.1 LAN INTERNET Proxy Server Source IP 209.191.93.52 Dest IP 172.16.0.2

Proxy types ,[object Object],[object Object],[object Object],[object Object],[object Object],Proxy setting in IE

Popular hardware & software proxies Software Proxy Hardware Proxy Ms. ISA Server Cisco PIX Squid Blue Coat Kerio WinRoute Cyberoam 1st Up Net Server Alacer CCProxy CProxy Windows ICS WinGate

What is firewall ? Firewall Firewall is hardware / software protects the resources of a private network from users from other networks Organization , universities , companies use firewall systems Firewall can act as gateway Firewall can act as proxy Firewall filter Incoming & Outgoing information LAN INTERNET

Main purpose of using firewalls ,[object Object],[object Object],[object Object],[object Object],  LAN INTERNET

How a firewall works ? ,[object Object],[object Object],[object Object],[object Object],[object Object],Sniffing Mode 1) An attacker tries to compromise a service on the protected network. 2) The Firewall identifies the attempt . LOG Alert  Reset Harden

What firewall protects us from ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Popular hardware & software firewalls Software Firewall Hardware Firewall Ms. ISA Server Cisco PIX Norton Internet Security Blue Coat Mcafee Internet Security Cyberoam ZoneAlarm Check Point Kerio NetScreen BlackICE D-link SECURESPOT Outpost WatchGuard

Thank You, ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Contact me : Poustchi@yahoo.com http://poustchi.blogspot.com

Proxy Servers & Firewalls

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