|Industry||Networking Hardware and Software|
|Founded||Waterloo, Ontario (2001)|
|Key people||Dave Caputo, Co-Founder, President and CEO
Scott Hamilton, CFO
Tom Donnely, Co-Founder, EVP Marketing & Sales
Brad Siim, Co-Founder, COO and VP Engineering
Don Bowman, Co-Founder, CTO
Sandvine Incorporated (TSX: SVC, AIM: SAND), is a networking equipment company based in Waterloo, Ontario, Canada. Sandvine network policy control products are designed to implement broad network policies, ranging from service creation, billing, congestion management, and security. Sandvine targets its products at consumer Tier 1 and Tier 2 networks including cable, DSL, and mobile.
Company history 
Sandvine was formed in August 2001 in Waterloo, Ontario, Canada, by a team of approximately 30 people from a recently closed Cisco acquisition, PixStream. An initial round of VC funding launched the company with $20M (Cdn). A subsequent round of financing of $19M (Cdn) was completed in May 2005.
In March 2006 Sandvine completed an initial public offering on the London AIM exchange under the ticker 'SAND'. In October 2006 Sandvine completed an initial public offering on the Toronto stock exchange under the ticker 'SVC'.
Initial product sales focused at congestion management as operators struggled with the high growth of broadband. Many operators have shifted focus to revenue generating services and reducing operational expenditure.
In June 2007 Sandvine acquired CableMatrix Technologies for its PacketCable Multimedia (PCMM)-based PCRF that enable broadband operators to increase subscriber satisfaction while delivering media-rich IP applications and services such as SIP telephony, video streaming, on-line gaming, and videoconferencing.
Rather than identifying individual messages, spam control is based on identifying sources of spam from behaviors such as using multiple SMTP servers, using multiple source (EHLO) domains and large address books.
The P2P throttling  focuses on Gnutella, and uses a path cost algorithm to reduce speeds while still delivering the same content. Stateful Policy Management  uses stateful deep-packet inspection and packet spoofing to allow the networking device to determine the details of the p2p conversation, including the hash requested. The device can then determine the optimal peer to use, and substitute it for the one selected by the P2P algorithm, by "[sitting] in the middle, imitating both ends of the connection, and sending reset packets to both client and server." 
Comcast controversy 
Sandvine products are used by Comcast in the United States to block or throttle Internet traffic generated by peer-to-peer file sharing software. Sandvine's current traffic discrimination product, Fairshare, is described in detail in an RFC.
According to independent testing, Comcast injected reset packets into peer-to-peer connections, which effectively caused a certain limited number of outbound connections to immediately terminate. This method of network management was described in the IEEE Communications, May 2000 article "Nonintrusive TCP Connection Admission Control for Bandwidth Management of an Internet Access Link".
A product whitepaper published by Sandvine confirms that its products are configurable to use "Session Management" capability to prevent customers using BitTorrent from providing uploads to peers who are not close to them on the network. This affects all uses of BitTorrent (such as open-source project distribution, patch distribution and illegal downloads).
In cases where a subscriber is a “seeder” and uploads content to an off net “leecher”, session management is an effective strategy... the subscriber may be session managed without negative impact. This is the default behaviour for Sandvine’s session management policy and limits external leechers from connecting to internal seeds.
See also 
- Sandvine Incorporated: Press Release - StarHub Selects Sandvine to Deploy End-to-End PacketCable MultiMedia Solution
- Sandvine Incorporated: Press Release - Major Wireless Carrier Selects Sandvine’s 10-Gigabit Ethernet Solution to Give Subscribers More Control over their Mobile Internet Experience
- Adelphia Selects Sandvine to Protect Subscribers from Worms and Spam. - Free Online Library
- Sandvine Management's Discussion and Analysis
- Sandvine buys CableMatrix for peanuts; Founder Laurence Rubin is upbeat: This is an opportunity Haaretz, 21.06.07
- Maste, Ed. "FreeBSD at Sandvine". BSDCan 2011.
- A SYSTEM AND METHOD FOR DETECTING SOURCES OF ABNORMAL COMPUTER NETWORK MESSAGES - Patent EP1743466
- (WO/2005/109816) A SYSTEM AND METHOD FOR DETECTING SOURCES OF ABNORMAL COMPUTER NETWORK MESSAGES
- Sandvine Incorporated: Service Delivery Engine
- CNW Group | VECIMA NETWORKS INC. | CableMatrix and VCom Showcase First QoS Enhanced Video Conferencing over WiMAX Solution
- (WO/2003/094465) PATH OPTIMIZER FOR PEER TO PEER NETWORKS
- "Meeting the Challenge of Today's Evasive P2P Traffic"
- Comcast traffic blocking: even more apps, groupware clients affected
- Sandvine Supports Cricket Broadband Internet
- Sandvine supports pre- and post-paid service plans across converged networks
- Comcast's compliance report to FCC on its previous network management techniques
- Comcast's Protocol-Agnostic Congestion Management System
- eff.org article on Comcast jamming Gnutella and Lotus
- IEEE Communications Interactive
- Nonintrusive TCP Connection Admission Control for Bandwidth Management of an Internet Access Link
- Session Management: BitTorrent Protocol - Managing the Impact on Subscriber Experience http://www.sandvine.com/general/getfile.asp?FILEID=21