Friday, July 9, 2010

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Wednesday, July 7, 2010

VoIP security - The dos and don'ts of VoIP security



Though there is precious little evidence of VoIP security attacks, organisations cannot afford to be complacent. Make no mistake, says Anthony Plewes, VoIP is an attractive target for hackers and malware writers.


To demonstrate the potential danger that enterprises with unsecured VoIP systems face, the Voice over IP Security Association (Voipsa) has published a list of publicly available tools that target VoIP applications. There are signs hackers are now turning their attention to voice over IP and most security commentators believe the first major attacks will occur over the next six to 12 months.

This means all enterprises need to ensure their VoIP infrastructure is protected, though this needn't be an onerous undertaking.


The simple fact that VoIP now typically comes under the aegis of the IT department should in fact help security. Although running proprietary operating systems, PBXs were in fact open to a large range of security attacks. It was generally just a little harder to access and required specialised knowledge.

While VoIP has increased the number of people able to exploit a corporate phone system, the tools and expertise to protect the technology have also been improved.

VLANs
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The first step for VoIP security is to follow data networking best practice. Ovum analyst Graham Titterington says: "Most security in VoIP is a question of good network security and housekeeping."

Enterprises should deploy the voice traffic on a separate virtual LAN, or VLAN, from the data traffic. This helps protect the voice service if there is a denial of service attack on the data network.

Chris Whitwood, network manager at University College Falmouth, which has deployed IP telephony, says: "Denial of service is a particular problem for VoIP as it can completely destroy your telephony service. To protect against this, enterprises need to use security such as intrusion prevention systems and have a well-segmented network using VLANs."

VLANs need to be properly architected to prevent packets jumping from one VLAN to the other. However, even if they are, hacking tools are available that can make packets do just that. Additional tools that will help networks in case of any attack are intrusion detection and prevention systems, which scan for rogue incoming packets, and straightforward antivirus software which can help prevent any known threats from disrupting the network.

Cisco and EMC planning to partner up and go after large datacentres

                                                              

Networking giant Cisco Systems and storage area networking company EMC may be teaming up to form a new joint venture to provide technology services to big companies, the Wall Street Journal reported Thursday.

Citing unnamed sources who have been briefed on the plans, the Journal story said the new joint venture, codenamed Alpine, would target large businesses and would focus on installing Cisco server and networking gear and EMC storage equipment into datacentres.

It's unclear when the joint venture might be announced, according to the newspaper. So far, Cisco has declined to comment on the speculation. And an EMC spokesperson provided a statement to the WSJ reiterating that the companies have always been close partners and will continue to be in the future.

Indeed, Cisco has been reselling EMC storage gear for years. Cisco also owns a stake in virtualisation software company VMware, which operates as a unit of EMC. So it makes sense that the companies would team up on a new services venture.

What's more, Cisco has been making a big push into the datacentre market. Earlier this year Cisco announced a new datacentre architecture it calls Unified Computing. This new architecture includes new hardware from Cisco, namely blade servers, an interconnection "fabric," a chassis for the blade servers, fabric extenders and network adapters. It also includes coordinated support and software integration from partners such as Intel, Microsoft, EMC, and VMware.

Cisco sees the datacentre market as a multibillion-dollar opportunity. The company anticipates a greater need for storage and high-speed networking within datacentres as more services and content come online. At the same companies are starting to virtualise their datacentres to make those operations more efficient.

Cisco and EMC each already have service businesses of their own. EMC generated about $4.8bn in revenue in 2008 from its services business, according to the Wall Street Journal. This was about 32 per cent of the company's overall revenue.

The Journal also said that Cisco's services business generated about $7bn to the company's coffers in fiscal 2009, which was about 19 per cent of total revenue.

Most of the services that Cisco provides are for products that have already been sold. But the new joint venture would be different because it would entail designing and implementing products to fit into a datacentre. And as datacentres become more complex, it makes sense that Cisco and EMC would want to develop a service to help customers design a datacentre that would use their products.

Traditionally, Cisco has relied on partners such as HP and IBM to provide these services and help sell its gear to customers. But with the introduction of Cisco's new datacentre server products, Cisco's partners are looking more like competitors.

The move to create a services business looks to be part of Cisco's overall strategy to diversify its business. The company's bread and butter is still providing routers and switches to large companies and service providers to power the internet. But over the past couple of years the company has begun to move aggressively into new areas like IP telephony, videoconferencing and consumer electronics and home networking gear.

Cisco has also dipped its toe into other services markets. For example, with the acquisition of WebEx, the company now offers corporate users a hosted collaboration service. It has also recently launched a hosted web service it calls Eos that allows media and entertainment companies to create, manage, and grow online communities by providing tools to create websites.