I must build up an IPSEC tunel between PA and Watchguard XTM. The other Side gives me ike phase where DH Group is 15.
On PA I only can choose Group 1—768 bits, Group 2—1024 bits (default), Group 5—1536 bits, Group 14—2048 bits, Group 19—256-bit elliptic curve group, and Group 20—384-bit elliptic curve group
Is there a way to build up a "custom" DH Group or must the otherside set the DH Group to a value that my PA side can work with?
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