A typical firewall can perform a number of tasks depending on the complexity of the firewall itself. The basic functions of a firewall are as follows:
Let’s assume you have a wireless base station, router or DSL/Cable modem that has a built in firewall. The management interface for these devices is typically accessed via your favorite web browser.
This information will make it easier to make an informed decision as to whether these are services you want to have running on your Linux system and, therefore, potentially accessible to the outside
In previous chapters we have covered the firewall located in the router or cable modem and viewed this as the first line of defense in protecting your Linux system from outside attack. In this chapte
The saying goes that a chain is only as strong as its weekest link and network security is no exception to this rule. In previous chapters we’ve looked a number of places where you can improve the l