Page Impressions Ltd Blogcetera: Deep Packet Inspection - Is Big Brother here to help?

Thursday, September 20, 2007

Deep Packet Inspection - Is Big Brother here to help?

Deep packet inspection (DPI) is a form of computer network packet filtering that examines the data part of a through-passing packet, searching for non-protocol compliance or predefined criteria to decide if the packet can pass. This is in contrast to shallow packet inspection, which is usually called just packet inspection, just checks the header portion of a packet. This form of filtering is enormously powerful and will enable a huge range of new value added services such as the Barefruit http error solution I mentioned in a previous articles and will enable significant new revenue streams.

From a technical perspective, DPI devices have the ability to look at Layer 2 through Layer 7 of the OSI model. This includes headers and data protocol structures. The DPI will identify and classify the traffic based on a signature database and will allow the user to perform many things.

A classified packet can be redirected, marked/tagged, blocked, rate limited, and of course, reported to a reporting agent in the network. In this way, HTTP errors of different classifications may be identified and forwarded to Barefruit for analysis. Many DPI devices also perform the ability to identify flows rather than a packet by packet analysis.

DPI allows ISPs and cable companies to "readily know the packets of information you are receiving online ranging from e-mail, to websites, to sharing of music, video and software downloads" in the same way as a network analysis tool. This is the approach that Cable Operators and ISPs use to dynamically allocate bandwidth according to traffic that is passing through their networks. Thus a higher priority can be allocated to a VoIP call versus web browsing.

DPI is also increasingly being used in security devices to analyze flows, compare them against policy, and then treat the traffic appropriately (i.e., block, allow, rate limit, tag for priority, mirror to another device for more analysis or reporting). Since the DPI device looks at each individual packed, it can be used by ISPs to provide or block services on a user by user basis.

The continued growth in peer-to-peer (P2P) traffic presents increasing problems for broadband service providers. Internet service providers (ISPs) do not generate any revenue from delivering P2P traffic to their subscribers, and smaller ISPs face considerable peering costs when P2P traffic goes off-net. Even for ISPs large enough to cover these costs, P2P drives increasing traffic loads, requiring additional capex for no additional revenue. Moreover, a minority of users generating large quantities of P2P traffic can degrade performance for the majority of broadband subscribers using less-intensive applications such as email or Web browsing. Poor network performance increases customer churn, leading to a decline in service revenues.

Deep packet inspection (DPI) technology has emerged from the enterprise world into service provider networks to help mitigate the impact of P2P. According to most vendors, initial uptake of DPI was fastest in Asia, where problems with P2P traffic and high off-net traffic had been most severe. European broadband providers were also early adopters of DPI, but for another reason: Due to high levels of competition from digital subscriber line (DSL) broadband operators in many countries, service providers used DPI as a means to implement tiered service plans, to differentiate them from standard “all-you-can-eat" or "one-size-fits-all” data services.

In the U.S. market, multiple system operators (MSOs) such as Cable Operators were early adopters of the technology. This is because Cable Operators faced greater challenges than DSL providers in the last mile. For a Cable Operator, the last-mile bandwidth is shared among users, whereas in a DSL network a dedicated link is established for each subscriber. Smaller DSL operators were generally early adopters of DPI, as they suffered most from P2P-generated off-net traffic and peering costs. Recently, vendors note an increase in the level of request for proposal activity from large wireline and wireless operators in the U.S. It appears that several operators are looking to deploy DPI alongside their IPTV deployments in 2007.

Worldwide, network operators spent US$96.8 million (£48.4 million) on DPI in 2005, but the DPI sector grew by more than 75% in 2006, to about $170 million (£85 million) , and is forecast to exceed $586 million (£293 million) in 2010.

This may be one case where "Big Brother" really is here to help!

6 comments:

Unknown said...

pusat grosir baju grosir baju grosir baju grosir pakaian toko baju korea reseller baju belanja baju baju wanita baju pesta murah jual baju import reseller baju online shop baju grosir baju fashion online baju murah bandung grosir baju dress grosir baju dress pusat grosir baju distributor baju supplier baju

柯云 said...

2015-12-22keyun
michael kors outlet
ugg australia
cheap uggs
chanel handbags
cheap uggs<
retro 11
uggs outlet
uggs on sale
kobe 8
coach outlet
sunglasses oakley
coach outlet store online clearance
louis vuitton bags
air force 1 trainers
the north face jackets
ugg boots outlet
prada
coach outlet
louboutin femme
coach factory outlet
ralph lauren
abercrombie clothing
cheap oakley sunglasses
jordan 11s
coach outlet online
celine handbags
canada goose
kate spade handbags
ray ban outlet store
louis vuitton outlet online
ray ban sunglasses
canada goose outlet
michael kors outlet
nike trainers sale
uggs on sale
soccer shoes
abercrombie
michael kors bags
kevin durant shoes
coach factory outlet

oakleyses said...

burberry outlet online,burberry,burberry outlet,burberry handbags,burberry factory outlet,burberry sale, ray ban sunglasses, michael kors outlet,michael kors,kors outlet,michael kors handbags,michael kors outlet online,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors, tiffany and co jewelry,tiffany and co outlet,tiffany and co,tiffany's,tiffanys,tiffany co,tiffany jewelry, rolex watches,rolex,watches for men,watches for women,omega watches,replica watches,rolex watches for sale,rolex replica,rolex watch,cartier watches,rolex submariner,fake rolex,rolex replica watches,replica rolex, tiffany and co jewelry,tiffany and co outlet,tiffany and co,tiffany's,tiffanys,tiffany co,tiffany jewelry, oakley sunglasses, longchamp handbags,longchamp,longchamp outlet,longchamp bags,long champ, uggs, nike free,free running,nike free run,nike free 5.0,free running 2,nike running shoes,nike free trainer,nike free trainer 5.0,free runs,free run 5.0, michael kors outlet store,michael kors outlet,michael kors outlet online,michael kors,kors outlet,michael kors handbags,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors, tory burch outlet,tory burch,tory burch handbags,tory burch shoes,tory burch sale,toryburch,tory burch sandals,toryburch.com,tory burch flip flops, prada handbags,prada,prada sunglasses,prada shoes,prada outlet,prada bags, kate spade outlet,kate spade,katespade,kate spade handbags, louis vuitton handbags,vuitton handbags,louis vuitton bags,louis vuitton purses, nike shoes,nike outlet,nike factory,nike store,nike factory outlet,nike outlet store,cheap nike shoes,nike sneakers, uggs outlet, louis vuitton outlet online,louis vuitton,louis vuitton outlet,louisvuitton.com,authentic louis vuitton,louis vuitton factory outlet,cheap louis vuitton, chanel handbags,chanel bags,chanel sunglasses,chanel purses,chanel outlet, louis vuitton outlet,louis vuitton outlet online,louis vuitton,louisvuitton.com,authentic louis vuitton,louis vuitton factory outlet,cheap louis vuitton, longchamp,longchamp handbags,longchamp outlet,longchamp bags,long champ

oakleyses said...

kate spade handbags,kate spade,kate spade outlet,katespade, nike free,free run,nike free run,nike free pas cher,nike free run pas cher,nike free france, nike air max,air max,air max pas cher,air max one,air max 90,air max france, hollister,abercrombie,abercrombie fitch,hollister france,hollister pas cher,abercrombie and fitch,hollister pas cher, timberland pas cher, true religion, nike air max, ralph lauren,ralph lauren uk,ralph lauren outlet,polo ralph lauren outlet, air force,nike air force,air force 1,air force one,nike air force 1,nike air force one,air force one nike, mulberry,mulberry handbags,mulberry outlet,mulberry bags,mulberry uk, nike air max, michael kors,sac michael kors,michael kors pas cher,sac michael kors pas cher,michael kors france, oakley pas cher,oakley,oakley soldes,lunette oakley pas cher,oakley france, michael kors, vans,vans pas cher,vans soldes, lululemon,lululemon canada,lululemon outlet canada,lululemon outlet online, true religion, longchamp,sac longchamp,longchamps,longchamp pas cher,sac longchamp pas cher,longchamp pliage,longchamp soldes,sac longchamps,longchamp france, hogan,hogan outlet,scarpe hogan,hogan sito ufficiale,hogan interactive, nike free run, air max,nike air max,air max pas cher,air max one,air max 90,air max france, tn pas cher,nike tn,nike tn pas cher,nike tn requin,tn requin,tn requin pas cher, coach outlet,coach factory outlet,coach outlet store,coach factory,coach outlet store online,coach factory online,coach factory outlet online,coach outlet online, north face, michael kors,michael kors uk,michael kors handbags,michael kors bags, nike roshe uk, coach outlet store online,coach outlet store,coach outlet, louboutin,chaussure louboutin,louboutin pas cher,chaussures louboutin,chaussure louboutin pas cher,louboutin france, true religion, michael kors canada, nike blazer

oakleyses said...

ugg boots,uggs,ugg,ugg boots uk,ugg uk, vans scarpe, montre pas cher, karen millen dresses, hollister,hollister canada,abercrombie and fitch,abercrombie,abercrombie and,abercrombie kids,af, swarovski jewelry, canada goose outlet, barbour,barbour jackets,leather jackets,barbour sale,barbour outlet,barbour uk,barbour coats,barbour clothing, converse, louis vuitton,louis vuitton canada,louis vuitton outlet,louis vuitton outlet online, pandora jewelry,pandora charms,pandora bracelet,pandora bracelets,pandora rings,pandora jewelry store locator,pandora charm,pandora charms clearance,pandora store,pandora jewelry outlet store,pandora jewelry sale online, rolex watches,replica watches,omega watches,rolex watches for sale,replica watches uk,fake rolex, moncler,moncler outlet,moncler sito ufficiale, moncler outlet, lancel, ugg,uggs,uggs canada, canada goose outlet, canada goose outlet, ugg pas cher, pandora jewelry, barbour, louis vuitton,borse louis vuitton,louis vuitton sito ufficiale,louis vuitton outlet, canada goose, ugg,ugg australia,uggs,ugg pas cher,ugg soldes,bottes ugg,bottes ugg pas cher, moncler jackets, gucci, louis vuitton,sac louis vuitton,louis vuitton pas cher,sac louis vuitton pas cher,louis vuitton france, doke & gabbana, juicy couture outlet, sac louis vuitton,louis vuitton,louis vuitton pas cher,sac louis vuitton pas cher,louis vuitton france, wedding dresses,wedding dress,dresses for wedding,bride dresses,dresses for weddings,wedding dresses uk,cheap wedding dresses,vintage wedding dresses,monsoon wedding dresses,lace wedding dresses,wedding dresses for older brides,wedding dresses 2014, coach outlet,coach factory,coach factory outlet,coach outlet store,coach outlet store online,coach factory online,coach factory outlet online,coach outlet online, juicy couture, moncler

Unknown said...

baja ringan galvalum zincalum memperbaiki kebocoran atap pagar besi tempa 10 langkah membuah rumah interior desainer arsitek modern depan elevations 2 d jasa membuat desain 8 pertanyaan untuk tanya sebelum mempekerjakan self sustaining rotating skyscraper rencana pentingnya desain struktural tipe perencanaan rumah type rumah rencana part 2 model paving block atau conblock pasir sebagai bahan utama material batako bata merah dan bata ringan tips memasang hebel rangka atap rumah genteng keramik berkualitas info harga pagar besi tempa galvanis dan holo