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Network Security Firewalls
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Re: Can phase 2 proxy-id be modified on SonicWall VPN's?

Subject: Re: Can phase 2 proxy-id be modified on SonicWall VPN's?
Date: 19 Jan 2008 02:25:12 -0000
The workaround I found that worked for me was to set a proxy-ID that was the 
supernet of all the networks reachable through the Netscreen. This works great 
in a classic telecommuter environment if you use 192.168 networks for your 
telecommuters, and 10 or 172.16 RFC1918 addresses in your data center/offices. 
You can literally have the proxy ID of the Netscreen be 10.0.0.0/8 and set the 
"network" in the Sonicwall to 10.0.0.0 255.0.0.0, and traffic will route 
properly. If your other networks aren't in a contiguous netblock, or can't be 
handled as a supernet, then this won't work for you, but it does work. It turns 
out that the proxy-ID on the netscreen is totally unrelated to any policy 
element or anything other than the SA. That proxy ID is set as the "network" in 
the SA in the sonicwall. The sonicwall then forwards all packets for the 
supernet to the Netscreen, which routes them accordingly.
The only other solution I know of is one SA for each route.

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