Thursday, September 19, 2019

Sonicwall IPSec tunnel double NAT issue

Client bought out a new location and they are currently forced to use the equipment already there outside of the firewall. They use sonicwalls throughout their organization so that is what they placed here behind the fiber router of the ISP. We have no access to that device to make it do a passthrough, so we are stuck dealing with the private IP scheme its giving out and dealing with the natting it is currently doing. I was able to get the tunnel up by building it in aggressive mode, but i am only seeing packets going outbound currently and none inbound. I cant ping the main office from this new remote site, but i can ping any device on the remote site from the main office. Could use some help thinking through this issue to see if I am missing anything.



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