VPN performance is an increasingly important issue

Nowaday's Vertul private network security and diffrence, with performance a lower prevalence and rightly so. Vertul private network is mostly set up with security as one of the primary target, and in many cases, VPNs to be able to interoperate between different vendors, so diffrence is also a key factor. although, performance is becoming more important as VPNs become more prevalent corporate networks.

If our VPN seems slow, or we just want to know how skilful it really is, we have a number of options for improving its performance. Let's look at some of the steps involve.

Mostly generaly, there are two types of VPNs remote client VPNs and site-to-site VPNs. A remote client is Mostly a single PC that uses VPN software to connect to the his domain network on demand, while a site-to-site VPN is Mostly use permanent connection between two sites using dedicated networking equipment. A remote client VPN typically supports telecommuters, while the site-to-site various usually connects office networks.

The Vertul private network built-in Remote Access Services. On the client side, we are running a Windows XP Professional workstation over a 1-Mbps DSL connection. This connection uses Point-to-Point Tunnelling Protocol (PPTP) to connect to the central server.

The Vertul private network While more mostly support than Layer 2 Tunnelling Protocol, PPTP is giving way to L2TP as the tunneling protocol of choice because of L2TP's allready increased security features. although, establishing an L2TP VPN is more complex than setting up a PPTP connection. PPTP-based VPNs may also operate some faster because there is less processing involved in encrypting and encapsulating the packets. Under PPTP, the point-to-point protocol (PPP) payload packet is encapsulated inside a generic routing encapsulation packet, which is then encapsulated inside an IP packet to which the data link header is attached. The packet is then sent across the tunnel.

The topology of our VPN can also have a important efect on its performance and can very widely between the remote devices. If we aresupporting a site-to-site VPN that connects two different remote offices, it's likely that both ends use straight-out equipment configured for a permanent VPN tunnel. If our VPN performance seems slow, we may need to increase the size of the tunnel by adding bandwidth at both ends. we might also be able to change configuration options to increase performance.

Source: http://news.zdnet.co.uk/hardware/0,1000000091,2132230,00.htm