VLAN
VLAN
A virtual LAN, commonly known as a vLAN or as a VLAN, is a logically-independent network. Several VLANs can co-exist on a single physical switch.
A VLAN consists of a network of computers that behave as if connected to the same wire - even though they may actually physically connect to different segments of a LAN. Network administrators configure VLANs through software rather than hardware, which makes them extremely flexible. One of the biggest advantages of VLANs emerges when physically moving a computer to another location: it can stay on the same VLAN without the need for any hardware reconfiguration./p>
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CyberGuard rebuilds firewall around Linux CyberGuard Corp. has rebuilt its flagship firewall/VPN software on top of a Linux platform, and has started encouraging its customers to migrate to the new system, which promises more flexibility over the longer term. The three new TSP, or "Total Stream Protection", appliances see CyberGuard abandon SCO Group Inc.'s Unixware 2.3 operating system for CG Linux, a new custom-made hardened Linux based on Red Hat 8 and the 2.4 kernel.
CyberGuard director of......
[more] AppGate Network Security Launches version 7.1 of the AppGate Security Server This latest version of the AppGate server provides new and improved features to support wireless and mobile working.
The ability to synchronize calendar and contacts on mobile devices with MS Exchange over the AppGate secure tunnel has been added. The Exchange synchronization has been tested on the Nokia 9300/9500 and Sony Ericsson P800/P900/P910.
Many companies use VLAN tagging on their networks to segment off wire......
[more] Virtual servers 'pose security risk' One of the most attractive features of virtualisation - the ability to replicate virtual servers on the fly to meet demand - carries major security risks - from data theft to denial of service - according to a talk scheduled for the Black Hat DC 2008 conference this week in Washington. When a virtual machine migrates from one physical server to another, it can be subject to a range of attacks primarily because authentication between machines is weak and the......
[more] UCSniff - VoIP eavesdropping made easy A security consultant with expertise in protecting phone conversations as they travel over the internet has unveiled a new tool that demonstrates just how vulnerable voice over internet protocol, or VoIP, calls are to interception. UCSniff bundles a hodgepodge of previously available open-source applications into a single software package that helps penetration testers assess the security of VoIP calls carried over a client's network. It also introduces se......
[more] Recalculating the telephony security equation Among the threats that keep IT security managers up at night, attacks against phone systems have often ranked near the bottom. The last time we asked IT leaders about their telephony security plans, just 2% had experienced a security incident, and in almost all of these cases, the attack was internal misuse of phone systems for personal long-distance calls. Few had developed any sort of comprehensive security or risk analysis plan covering their voic......
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