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Hardening Linux Server with TCP Wrappers

Author : Admin

TCP Wrappers, in the same manner by name, provides protection Linux server services that communicate using TCP packets. So, systems that communicate using TCP packets channel, those packets through TCP Wrappers and the request is checked against a series of rules. Majority of the commercial Linux server like Redhat Enterprise Linux AS, SLES and others distribution implement a facility known as TCP Wrappers. The TCP Wrappers are implemented using two files, one controlling what is specifically accepted and the other that specifies denials. The files are called /etc/hosts.allow and /etc/hosts.deny. These files provides ability to define access to Linux server services based on IP Address or hostname.

 

Rules of the TCP Wrappers in the /etc/hosts.allow and /etc/hosts.deny files, the process is sequential : clients and users listed in hosts.allow are allowed acess and clients / users listed in hosts.deny are denied access. … continue reading : Hardening Linux Server with TCP Wrappers.

8 July 2009 at 20:03 - Comments