is there a possibilty, to setup IPS exceptions for external IPs?
I only see, that specific IPS-IDs can be "whitelisted".
If you'd like to make exceptions by IP, you'll want to duplicate that policy. and have the IPs in the TO field of the policy instead of any-external.
Make sure the new policy is above the old one and the IPS checkbox is off in the new policy.
WatchGuard Customer Support
ok, that's a nice hint.