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Content Tagged with iptables + networking

IP Masquerade is a form of Network Address Translation or NAT which NAT allows internally connected computers that do not have one or more registered Internet IP addresses to communicate to the Internet via the Linux server’s Internet IP address. The software interface which enables one to configure the kernel for IP masquerading is iptables.

The bulk of the work therefore stays in the kernel's netfilter (that's for robustness and no user-land dependency), but the control interface is integrated with the usual firewalling script.

psad is a collection of three lightweight system daemons that run on Linux machines and analyze iptables log messages to detect port scans and other suspicious traffic.

Circuit des packets via Linux/Netfilter