How to configure VPN to listen at certain IP on Sonicwall?

This is using DELL Sonicwall NSA 2600. Currently, 2 network ports are in use - X0, for LAN; and X1 for WAN. For LAN, we are using, while X0, there is a IP pool - a.b.99.128/28; See the IP addresses allocated:

     X0 -
     X1 - a.b.99.130

Current, few IPsec tunnel site-to-site were configured and working fine. Except for one site, in which the ip - a.b.99.130 was blocked by the other side of the IPsec tunnel. Now, I am thinking to use a different IP, for example, .142, to be binds to this IPsec tunnel. Shall I have create a secondary IP on X1 interface? How to configure the X0 interface, so as this site VPN is listening at a different IP?

MichaelBalackSenior System EngineerAsked:
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J SpoorTME / Network Security EvangelistCommented:
It is unfortunately not possible to terminate VPNs to another IP then the WAN primary IP.

What is blocking the IP?
MichaelBalackSenior System EngineerAuthor Commented:
Hi JSpoor,

Originally, on this current sonicwall, we setup 5 site-to-site VPNs to other countries, and all works fine. This firewall is located at Taiwan, and suddenly, the vpn to China dropped. The symptom is, China firewall WAN IP is not pingeable from Taiwan, and vice versa.

At the end, we confirmed that the Taiwan fiewall WAN ip has been blocked by China Telecom Authority. Repetitive appeals to get the IP delisted down to drain.
J SpoorTME / Network Security EvangelistCommented:
the reason for black listing?
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MichaelBalackSenior System EngineerAuthor Commented:
No idea.
J SpoorTME / Network Security EvangelistCommented:
the only option you have then I guess is to swap IP's on the main side...

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MichaelBalackSenior System EngineerAuthor Commented:
Mainland China is very sensitive upon the data from Taiwan. This could be a political issue. For any data (such as, encrypted data from VPN) that not able to track, they will block it.
J SpoorTME / Network Security EvangelistCommented:
you have any other sites? you can use to hub and spoke ?
MichaelBalackSenior System EngineerAuthor Commented:
As expert - JSpoor suggested, swap the IP address for WAN (x1) interface. We did it, and it works
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