UDgateway WAN Optimization

www.UDcast.com - UDgateway overview 1. Why UDgateway? All-in-one solution Value added services Networking project requirements Optimize IP traffic on constrained links Enhance user experience Save bandwidth UDgateway is a comprehensive solution for two main purposes: Enable Service Providers to address specific network requirements and therefore add value to their offerings Improve the network performance on links with suffer from technical or financial constraints, such as: Low bit rates Long latencies Expensive bandwidth v2.1 www.UDcast.com - UDgateway overview 2 2

www.UDcast.com - UDgateway overview What’s in a UDgateway? Link management Web compression Content distribution … … Compression Quality of Service Security Acceleration The “add-on” features are available on some Udgateway models. They are enablers for value-added services. The lower features are available on all Udgateway models. They are enablers for WAN optimization. v2.1 www.UDcast.com - UDgateway overview 3 3 3 3

www.UDcast.com - UDgateway overview WAN optimization Acceleration Security WAN optimization Quality of Service Compression v2.1 www.UDcast.com - UDgateway overview 4 4

Performance enhancement File sharing acceleration Transfer times with UDgateway Download time (Seg) Time (s) without UDgateway with UDgateway ADSL Unacceptable 50% 6.3x 4.7x 7.4x These graphs show the effects of the WAN optimization features the user experience: Web browsing times are reduced Download times are reduced  End-user satisfaction improvement 8.6x 1/3 OK 25.8x 24.5x 19.9x 19.3x Good 20% 40% 60% 80% Site % FTP HTTP CIFS POP3 Source: UDcast, January 2009 Tests done on dedicated 1Mbps/1Mbps Data Rate, Delay 600 ms and word files (3.4 MB)‏ v2.1 www.UDcast.com - UDgateway overview 5 5 5

Performance enhancement File sharing acceleration Transfer times with UDgateway Download time (Seg) Time (s) without UDgateway with UDgateway ADSL Unacceptable 50% 6.3x 4.7x 7.4x These graphs show the effects of the WAN optimization features the user experience: Web browsing times are reduced Download times are reduced  End-user satisfaction improvement 8.6x 1/3 OK 25.8x 24.5x 19.9x 19.3x Good 20% 40% 60% 80% Site % FTP HTTP CIFS POP3 Source: UDcast, January 2009 Tests done on dedicated 1Mbps/1Mbps Data Rate, Delay 600 ms and word files (3.4 MB)‏ v2.1 www.UDcast.com - UDgateway overview 6 6 6

www.UDcast.com - UDgateway overview WAN optimization Acceleration Improve end-user experience Use bandwidth efficiently and effectively Security Control network access Block unwanted traffic v2.1 www.UDcast.com - UDgateway overview 7 7 7

WAN optimization (cont.) QoS Control bandwidth usage Ensure fair bandwidth sharing Prioritize business critical traffic Compression Use bandwidth efficiently and effectively Eliminate redundant traffic Get extra bandwidth for free v2.1 www.UDcast.com - UDgateway overview 8

File download compression Download time reduction: up to -97% 3 seconds instead of 1min40s Volume reduction: up to -97% 3 MB instead of 100 MB Bandwidth efficiency: up to x24 24 Mbit/s for the price of 1 Mbit/s WAN optimization is particularly spectacular for large file downloads. v2.1 www.UDcast.com - UDgateway overview 9 9

www.UDcast.com - UDgateway overview Link Management Benefit from multiple WAN links High-availability Least Cost Routing Adapt routing strategy to Applications Users More links means more bandwidth Differentiate forward / return links Multi-ISP links Link Management is a key feature for subscribers with multiple links, for example: VSAT + Inmarsat. Often, these links have very different characteristics, both in technical terms (throughput, latency, security) and in financial terms (volume-based cost, flat fee for shared bandwidth or dedicated bandwidth) Link Management is a flexible feature that enables optimal use of each link. v2.1 www.UDcast.com - UDgateway overview 10 10 10

www.UDcast.com - UDgateway WAN optimization DNS proxy Purpose Cache DNS responses locally Deliver responses at LAN speed References RFC 1034 Domain names - concepts and facilities RFC 1035 Domain names - implementation and specification v2.1 www.UDcast.com - UDgateway WAN optimization 11

At least 600 ms saved for same request DNS proxy ISP At least 600 ms saved for same request DNS 2) DNS request: Where is www.udcast.com ? 3) DNS reply: www.udcast.com 193.251.10.104 DNS IDU DNS 4) DNS reply: 193.251.10.104 1) DNS request: Where is www.udcast.com ? INTERNET 5) IP request WEB 6) IP reply ping www.udcast.com www.udcast.com (193.251.10.104) v2.1 www.UDcast.com - UDgateway WAN optimization 12

www.UDcast.com - UDgateway WAN optimization 4. WANcompress Purpose: Save bandwidth by eliminating redundancy from network streams Example: Send e-mail with large attachment Make some changes Send again  Only the changes are sent More than 20x acceleration on repetition of same data v2.1 www.UDcast.com - UDgateway WAN optimization

WANcompress Compression (I) File Transfer – first time Full file transferred On the fly compression UDgateway-WANcompress® UDgateway-WANcompress® WAN File saved to disk on both ends v2.1

WANcompress Compression (II) File Transfer – second time Full file transferred Only label reference WAN UDgateway-WANcompress® UDgateway-WANcompress® Synchronized v2.1

WANcompress Compression (III) Edited file transfer Full file transferred Label + Modifications Changes + UDgateway-WANcompress® UDgateway-WANcompress® Synchronized v2.1 www.UDcast.com - UDgateway WAN optimization

Benefits for Service providers Get more out of expensive links: Satellite, WiMAX, Microwave, etc. Put more customers on same infrastructure v2.1 www.UDcast.com - UDgateway WAN optimization

Benefits for end-users Get more out of slow or expensive links GPRS/UMTS, Inmarsat, VSAT, WiMAX, etc. Avoid upgrading link Reduce volume-based charges Avoid Fair Access Policy penalty v2.1 www.UDcast.com - UDgateway WAN optimization

WANcompress operation TCP stream level Independent of file structure WANcompress does not even know what a “file” is Independent of delivery method Mail attachment, ftp, web download Unencrypted traffic Before VPN encryption v2.1 www.UDcast.com - UDgateway WAN optimization

WANcompress operation (cont.) Traffic redundancy Data protocol headers Non-cacheable Web objects “nocache” tag, scripts, dynamic pages (PHP, JSP, ASP…) Collaborative workplace Software updates Antivirus Windows, Adobe, Firefox, Apple… “The bigger, the better” v2.1 www.UDcast.com - UDgateway WAN optimization

WANcompress operation (cont.) Dictionary-based compression: Compression dictionary Transmitted streams  labels Decompression dictionary Received streams  labels Transparent to both communicating parties Fully interoperable with all TCP applications Lossless compression v2.1 www.UDcast.com - UDgateway WAN optimization

www.UDcast.com - UDgateway WAN optimization WANcompress vs. IPcomp Compression scope IPcomp Only fractions of seconds in traffic history 8 KB block default 1.5 KB in practice WANcompress Up to days or weeks of traffic history On-disk dictionary : tens of Gigabytes 10 Gigabytes  10 days of traffic at 100 kbit/s average v2.1 www.UDcast.com - UDgateway WAN optimization

www.UDcast.com - UDgateway WAN optimization WANcompress security TCP streams are stored on source and destination  confidentiality Data streams may be encrypted on disk Only UDgateway that has stored it can decrypt it Decryption key is destroyed by power-off Exists only in RAM v2.1 www.UDcast.com - UDgateway WAN optimization

WANcompress reliability Data on source and destination disks out of sync  data integrity Checksums When in doubt, uncompressed data is sent v2.1 www.UDcast.com - UDgateway WAN optimization

Resetting the dictionaries Reboot Disable / wait for 10 seconds / enable v2.1 www.UDcast.com - UDgateway WAN optimization

Thank you for your attention v2.1 www.UDcast.com - UDgateway WAN optimization