Red Hat ENTERPRISE LINUX AS 2.1 - Guida di Installazione Scaricare il pdf (Pagina 34)

26 Chapter 2. Installing Red Hat Enterprise Linux

2.15. Firewall Conﬁguration

Red Hat Enterprise Linux offers ﬁrewall protection for enhanced system security. A ﬁrewall exists

between your computer and the network, and determines which resources on your computer remote

users on the network can access. A properly conﬁgured ﬁrewall can greatly increase the security of

your system.

Figure 2-12. Firewall Conﬁguration

Next, you can decide whether to enable a ﬁrewall for your Red Hat Enterprise Linux system.

No ﬁrewall

No ﬁrewall provides complete access to your system and does no security checking. Security

checking is the disabling of access to certain services. This should only be selected if you are

running on a trusted network (not the Internet) or plan to do more ﬁrewall conﬁguration later.

Enable ﬁrewall

If you choose Enable ﬁrewall, connections are not accepted by your system (other than the

default settings) that are not explicitly deﬁned by you. By default, only connections in response

to outbound requests, such as DNS replies or DHCP requests, are allowed. If access to services

running on this machine is needed, you can choose to allow speciﬁc services through the ﬁrewall.

If you are connecting your system to the Internet, this is the safest option to choose.

Next, select which services, if any, should be allowed to pass through the ﬁrewall.

Enabling these options allow the speciﬁed services to pass through the ﬁrewall. Note, these services

may not be installed on the system by default. Make sure you choose to enable any options that you

may need.

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 85 86

Nessun commento

Red Hat ENTERPRISE LINUX AS 2.1 - Guida di Installazione Pagina 34