By default, if there is a UDP device in the middle, ASA will use IPsec over NAT-T, which is UDP 4500, and using the ipsec-udp disable command will not disable that. It will only disable IPSec over UDP over any other port, which is different from NAT-T, though the functionality is essentially the same.
Do you want to use IPSec over TCP instead? If yes, then you could enable that. The document below shows how that can be done. To disable nat-t, you do:
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...