PDA and Smartphones – Bluetooth Communications

Bluetooth Communications: Bluetooth is a Personal Area Network (PAN) standard that enables wirelessconnections between electronic devices in the 2.4 GHz range over short distances, as an alternative to cables.

Designed to be power efficient, Bluetooth has become a common feature in cell phones. Since wireless communications is inherently insecure, a number of basic security provisions have been defined for this standard to mitigate the risks involved. The three basic security services [..]

Firewalls | Policies Based on Applications

Most early firewall work involved simply blocking unwanted or suspicious traffic at the network boundary. Inbound application proxies take a different approach—they let traffic destined for a particular server into the network, but capture that traffic in a server that processes it like a port-based firewall.

The application proxy approach provides an additional layer of security for incoming traffic by validating some of the traffic before it reaches the desired [..]

Firewall policies | IP Addresses and Characteristics

Firewall policies should only permit appropriate source and destination IP addresses to be used. Specific recommendations for IP addresses include:

• Traffic with invalid source or destination addresses should always be blocked, regardless of the firewall location. Examples of relatively common invalid IPv4 addresses are 127.0.0.1 (also known as the localhost address) and 0.0.0.0 (interpreted by some operating systems as a localhost or a broadcast address). These have no legitimate use on [..]

Scan computer in safe mode ?

Some people scan their computer in safe mode because less services are loaded and so greater chance of files not being in use, and better chance of being able to be removed.Also it used to be that many forms of malware did not load in safe mode, but the bad guys have gotten better in their coding and new methods allow spyware and viruses to boot up[..]