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We have just finished configuring L2TP VPN access for a remote Juniper SSG-5 security appliance. We have properly imported the certs (using the Certificates MMC), and are now attempting to connect to the VPN using the provided Microsoft VPN client (under Control Panel &gt;&nbsp;Network Connections &gt;&nbsp;New Connection Wizard). We've altered the settings on the Windows VPN client to be L2TP'/IPSec, but when we attempt to connect, we get the following error:<br />
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Error 792: The L2TP connection attempt failed because security negotiation timed out. <br />
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I am having trouble finding information online about this issue. Does anyone have any idea why this might be occuring?<br />
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Please note that the XP machine I am attempting to connect with is behind a Juniper NS5GT security appliance itself.
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We have just finished configuring L2TP VPN access for a remote Juniper SSG-5 security appliance. We have properly imported the certs (using the Certificates MMC), and are now attempting to connect to the VPN using the provided Microsoft VPN client (under Control Panel > Network Connections > New Connection Wizard). We've altered the settings on the Windows VPN client to be L2TP'/IPSec, but when we attempt to connect, we get the following error:

Error 792: The L2TP connection attempt failed because security negotiation timed out. 

I am having trouble finding information online about this issue. Does anyone have any idea why this might be occuring?

Please note that the XP machine I am attempting to connect with is behind a Juniper NS5GT security appliance itself.

Error 792 when attempting to connect to L2TP/IPSec Tunnel on Juniper SSG5 using Windows XP VPN client.

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.

Internet Protocols

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.