client ip address HowTo - Linux / Unix Q & A from nixCraft

Iptables Limits Connections Per IP

in Iptables last updated February 9, 2010

How do I restrict the number of connections used by a single IP address to my server for port 80 and 25 using iptables?

Squid Proxy Hide System’s Real IP Address

in Linux, Networking, Security, Squid, Troubleshooting, UNIX last updated May 23, 2017

My squid proxy server is displaying system’s real IP address. I’ve a corporate password protected squid proxy server located at 202.54.1.2. My clients work from home or offices via A/DSL / cable connections. Squid should hide all system’s IP address, but it is forwarding and displaying the system’s (client computers internal) IP address. How do I configure squid to hide client’s real IP address?

PHP: Determine or Retrieve Visitor’s IP Address Using PHP Script

in CentOS, Debian / Ubuntu, FreeBSD, HP-UX Unix, Linux, PHP, Programming, RedHat and Friends, Solaris-Unix, Suse, Ubuntu Linux, UNIX last updated April 4, 2013

How do I determine or retrieve visitor’s IP address using PHP server side programming under Unix/Windows operating systems?