You may use below configuration to turn off NAT for HTTPS connection that will be used for DVPN.
set security nat destination rule-set HTTP_DSTNAT rule No-NAT match destination-address 192.168.1.220/32
set security nat destination rule-set HTTP_DSTNAT rule No-NAT match destination-port 443
set security nat destination rule-set HTTP_DSTNAT rule No-NAT then destination-nat off
Please place this rule before your current NAT rule "r1", you can use the below command to achieve this.
"insert security nat destination rule-set HTTP_DSTNAT rule r1 after rule No-NAT"
Let me know if you have any questions.
Thanks,
Suraj
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