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- VPN Connection to Cisco PIX501
- Hi everyone!I'm having some problems getting a VPN connection running to a PIX 501.I had it running - started to fiddle around - and now for some reason I can't get it back to work :(Some info in advance:- not an expert in in-depth networking or encryption at all- used...
- Tags: VPNs, Network security, TELECOMMUNICATIONS, NETWORKING, SECURITY, al@..., vID, Sev=Info/4 IPSEC/0x63700014 Deleted, ISAKMP OAK AG, Sev=Info/4 IKE/0x63000021 Retransmitting, Sev=Info/4 IKE/0x63000013 SENDING, Retransmission, VPN, Cisco Systems Inc.
- Discussion threads 2007-11-18
- Content-Aware P2P Video Streaming With Low Latency
- This paper describes the Stanford P2P Multicast SPPM streaming system that employs an overlay architecture specifically designed for low delay video applications. In order to provide interactivity to the user, this system has to keep the end-to-end delay as small as possible while guaranteeing a high video quality. A set...
- Tags: Aware, Latency, Streaming Video, Video, Retransmission, Corporate Communications, Marketing
- White papers 2007-04-26
Additional Resources
- Establishing a Trade-Off Between Unicast and Multicast Retransmission Modes for Reliable Multicast Protocols
- The conventional approach to reliable multicast in computer networks relies on the retransmission on demand of lost packets. Existing multicast protocols adopt a static packet retransmission scheme unicast or multicast to retransmit these packets, often leading to performance loss due to wasting bandwidth resources. This is worse if it consider...
- Tags: Mobile, Network, Advertising & Promotion, Wi-Fi, Wireless, Networking, Marketing
- White papers
- Optimizing TCP Retransmission Timeout
- Delay spikes on Internet paths can cause spurious TCP timeouts leading to significant throughput degradation. However, if TCP is too slow to detect that a retransmission is necessary, it can stay idle for a long time instead of transmitting. The goal is to find a Retransmission Timeout RTO value that...
- Tags: Goal, TCP, Tcp/Ip, Networking
- White papers 2005-02-05
- Link-Layer Fragmentation and Retransmission Impact on TCP Performance in 802.11-Based Networks
- The objective of this paper is to examine the behavior of TCP in 802.11-based networks. The focus of this work is mainly on the effect of the fragmentation and frames retransmission handled at the MAC layer on the TCP end-to-end performance. The packet loss rate and the end-to-end delay of...
- Tags: IEEE 802.11, Network, TCP, Tcp/Ip, Networking
- White papers 2007-01-01
- An Algorithm to Detect TCP Spurious Timeouts and Its Application to Operational UMTS/GPRS Networks
- This paper proposes an algorithm to identify TCP spurious retransmission timeouts by post processing of packet traces monitored in operational networks. The operational principles of the algorithm and the assumptions behind its design are explained in detail as well as the situations in which the algorithm is prone to inaccuracies....
- Tags: Algorithm, UMTS, Network, GPRS, TCP, Engineering, Tcp/Ip, Networking
- White papers 2006-01-30
- Defending Against Low-Rate TCP Attacks: Dynamic Detection and Protection
- This paper considers a distributed approach to detect and to defend against the low-rate TCP attack. The low-rate TCP attack is essentially a periodic short burst which exploits the homogeneity of the minimum Retransmission Time Out RTO of TCP flows and forces all affected TCP flows to back off and...
- Tags: TCP, Attack, TCP Attack, Tcp/Ip, Networking
- White papers 2007-01-01
- A Reliable Subcasting Protocol for Wireless Environments
- This paper presents an end-to-end reliable multicast protocol for use in environments with wireless access. It divides a multicast tree into sub-trees where subcasting within these smaller regions is applied using a tree of Retransmission Servers RSs. RM2 is receiver oriented in that the transmitter does not need to know...
- Tags: Internet Engineering Task Force, IP, RM2, Internet Group Management Protocol, Network Technology, Wi-Fi, Networking, Wireless
- White papers
- VPN from inside SBS 2003
- We do tech support through vpn's from within our network to other's. Anew connection using Avaya vpnremote client does not complete connection. I have opened ports 500 and 4500 with no luck and static routes on the server.avaya log file:1 INFO 09:12:2007 09:53:14...
- Tags: VPNs, Network security, NETWORKING, SECURITY, Microsoft Windows Small Business Server 2003, kenc@..., Microsoft Windows Small Business Server, IKE SA, payload, VPN
- Discussion threads 2007-09-12
- Help with client-to-gateway VPN connection for NETGEAR DG834
- Hi, I have a NETGEAR DG834 ADSL Router and want to setup simple VPN connection from my laptop which has a Telstra nextG card in it to the office network.So, I run the VPN Wizard on the router- enter a connection name- enter a pre-shared key-and select VPN Tunnel will...
- Tags: VPNs, Routers & switches, Home networking, NETWORKING, Network security, Network technology, TELECOMMUNICATIONS, VPN, NetGear, bavial@..., ConnectionsNew Connection, ISAKMP OAK MM, Thu, Sending
- Discussion threads 2007-06-27
- Dynamic Issues in MPLS Service Restoration
- Packet loss and reordering are the most significant negative effects resulting from protection switching. In conventional MPLS networks, the detection and retransmission of out-of-order or lost packets is left to the higher layers, which in effect, degrades the overall performance. This paper proposes a signaling mechanism to minimize the impact...
- Tags: MPLS, University Of New Hampshire, Signaling Protocol, Network Technology, Networking
- White papers 2008-01-01
- MobileTFTP (zip)
- Tftp server for Windows Mobile Pocket PC. It accepts multiple concurrent connections and features options to set access permissions, to enable tftp extension options, logging and timeouts. Fully compliant with tftp protocol (rfc 1305) version 2, supports tftp options extension (rfc 2347) such the tsize and the packet retransmission timeout....
- Tags: TFTP, Daniele Pedrazzini
- Software downloads 2008-07-25
- A Cross-Layer Framework for Wireless LAN QoS Support
- The IEEE802.11x based wireless LAN technologies are leading the indoor Internet distribution in education, business and home environments. They are usually deployed as wireless extension of a broadband access to the network (i.e. DSL, cable modem, etc). These technologies are based on CSMA/CA media access with a positive MAC layer...
- Tags: MAC, WLAN, IEEE, Wi-Fi, Wireless LANs, LANs, Wireless, Networking
- White papers
- End-to-End Flow Monitoring With IPFIX
- End-to-End (E2E) flow monitoring is useful for observing performance of networks such as throughput, loss rate, and jitter. Typically, E2E flow monitoring is carried out at end hosts with known tools such as iperf. However, in a large-scale network, the end-host approach for performance measurement may not be easily deployed...
- Tags: Monitoring
- White papers 2007-05-18
- A New MAC Scheme for Very High-Speed WLANs
- This paper considers the Medium Access Control MAC layer for very high-speed Wireless LANs, which is designed to support rich multimedia applications such as high-definition television. In such networks, the PHYsical PHY layer data rate is proposed to exceed 216Mbps. The legacy MAC layer, however, greatly restricts the performance improvement...
- Tags: MAC, Transportation
- White papers 2006-04-10
- A Caching Mechanism to Improve the Reliability of Multicasting in Multihop MANET
- Reliable multicasting takes help of re-transmissions from the source, to recover lost packets .This imposes a huge overhead on the bandwidth-constrained ad hoc network. In On Demand Multicast Routing Protocol ODMRP, the multicast members send Join Replies to the periodic Join Queries initiated by the source, to maintain their membership....
- Tags: Packet, Multicasting, Indian Institute Of Technology
- White papers
- Understanding demand dial connections in Windows 2000
- In previous Daily Drill Downs, Jim Boyce has shown you how to use your Windows 2000 server as a router. But how do you actually make the connections? In this Daily Drill Down, he introduces demand dial connections for Windows 2000.In previous Daily Drill Downs, I explained how to implement...
- Tags: Jim Boyce, Microsoft Windows, dial connection, Microsoft Windows 2000, on-demand
- Technical articles 2000-12-25
- Performance Analysis of a Multicast Protocol for Wireless Environments
- This paper presents a performance study, using both analytical modeling and simulation techniques, of a new end-to-end reliable multicast protocol for use in environments with wireless access. The proposed protocol, known as the Reliable Mobile Multicast protocol (RM2), divides a multicast tree into sub-trees where subcasting is applied within these...
- Tags: Performance, Protocol, RM2, Internet Group Management Protocol, Performance Management, Research & Development, Network Technology, Wi-Fi, Networking, Wireless, Human Resources, Workforce Management, Business Operations
- White papers
- RMCM: Reliable Multicasts for Core-Based Multicast Trees
- Reliable multicast is one of the important and challenging problems that must be effectively resolved before multicast applications can be fully deployed on the Internet. Most existing reliable multicast schemes focus on source-based multicast trees. They either cannot be directly deployed in core-based multicast trees or may render sub-optimal performance...
- Tags: Tree, Internet, Routers & Switches, Performance Management, Network Technology, Networking, Human Resources, Workforce Management
- White papers
- Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN
- As far as transfer reliability is concerned, the wireless segment of UTRAN is the weakest part of an Internet session. To overcome this imperfection, the RLC protocol features a link-level retransmission mechanism. This paper shows by analytical means and computer simulations that for a given Block Error Rate BLER, the...
- Tags: Throughput, TCP, Tcp/Ip, Networking
- White papers 2007-01-01
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