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I have a few TZ170 sonicwall firewalls deployed. &nbsp;On the main site we've hooked up an additional internet provider to the OPT port to get some redundancy. &nbsp;My site to site VPNs will connect flawlessly on both the WAN and the OPT port when one connection goes down. &nbsp;However I'm unable to get the Global VPN Client to connect on the OPT port. &nbsp;The sonicwall is dropping the packets but I don't see any firewall rule telling it to do that.<br />
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2 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11/19/2008 17:02:36.848 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Notice &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Network Access &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;UDP packet dropped &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[CLIENT IP ADDRESS], 500, OPT &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[OPT PORT IP ADDRESS], 500, OPT &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;UDP ISAKMP &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
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I have a few TZ170 sonicwall firewalls deployed.  On the main site we've hooked up an additional internet provider to the OPT port to get some redundancy.  My site to site VPNs will connect flawlessly on both the WAN and the OPT port when one connection goes down.  However I'm unable to get the Global VPN Client to connect on the OPT port.  The sonicwall is dropping the packets but I don't see any firewall rule telling it to do that.

2	11/19/2008 17:02:36.848	Notice	Network Access	UDP packet dropped	[CLIENT IP ADDRESS], 500, OPT	[OPT PORT IP ADDRESS], 500, OPT	UDP ISAKMP	

Setting up GVC access on TZ170 OPT

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

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.