March, 2018

  • 23 March

    Certificate Policies

    Certificate Policies

    Certificate Policies: Certificate policies define what certificates do. A CA can potentially issue a number of different types of certificate—say, one for email, one for e-commerce, and one for financial transactions. The policy might indicate that it isn’t to be used for signing contracts or for purchasing equipment. Certificate policies …

  • 22 March

    Working with Registration Authorities and Local Registration Authorities

    Working with Registration Authorities and Local Registration Authorities

    Working with Registration Authorities and Local Registration Authorities: A registration authority (RA) offloads some of the work from a CA. An RA system operates as a middleman in the process: It can distribute keys, accept registrations for the CA, and validate identities. The RA doesn’t issue certificates; that responsibility remains …

  • 21 March

    Using a Certificate Authority

    Using a Certificate Authority

    Using a Certificate Authority: A certificate authority (CA) is an organization that is responsible for issuing, revoking, and distributing certificates. A certificate is nothing more than a mechanism that associates the public key with an individual. It contains a great deal of information about the user. Each user of a …

  • 20 March

    Hardening DHCP Services

    Hardening DHCP Services

    Hardening DHCP Services: Dynamic Host Configuration Protocol (DHCP) is used in many networks to automate the assignment of IP addresses to workstations. DHCP services can be provided by many different types of devices, including routers, switches, and servers. The DHCP process involves leasing TCP/IP address to a workstation for a …

  • 19 March

    Hardening Web Servers

    Hardening Web Servers

    Hardening Web Servers: Web servers are one of the favorite areas for attackers to exploit because of the reach they have. If an attacker can gain access to a popular web server and take advantage of a weakness there, they have the opportunity to reach thousands, if not hundreds of …

  • 18 March

    Hardening DNS Servers

    Hardening DNS Servers

    Hardening DNS Servers: Domain Name Service (DNS) servers resolve hostnames to IP addresses. This service allows a website name such as www.sybex.com to be resolved to an IP address such as 192.168.1.110. NOTE: A registrar manages your domain name, and most require an annual renewal fee. If these fees are …

  • 17 March

    Hardening FTP Servers

    Hardening FTP Servers

    Hardening FTP Servers: File Transfer Protocol (FTP) servers are not intended for high-security applications because of their inherent weaknesses, Most FTP servers allow you to create file areas on any drive on the system. You should create a separate drive or subdirectory on the system to allow file transfers. If …

  • 15 March

    Hardening Email Servers

    Hardening Email Server: Email servers provide the communications backbone for many businesses they typically run either as an additional service on an existing server or as dedicated systems. Putting an active virus scanner on email servers can reduce the number of viruses introduced into your network and prevent viruses from …

  • 14 March

    Securing the Network

    Securing the Network

    Securing the Network: Obviously, network security is broad topic, and it will be addressed throughout these articles However, there are some essential concepts identified on the CompTIA Security + exam that are discussed in this section: MAC Limiting and Filtering: Limit access to the network to MAC addresses that are …

  • 13 March

    The Private – Public – Community and Hybrid Cloud

    The Private – Public – Community and Hybrid Cloud

    Private Cloud: According to NIST, a private cloud is defined as follows: The cloud infrastructure is provisioned for exclusive use by a single organization comprising multiple consumers (e.g., business units). It may be owned, managed, and operated by the organization, a third party, or some combination of them, and it …