Certificate error

[Thijscream]

Hi,
I tried setting up a mumble server in my esxi host. but i'm getting errors on the certificate.
i'm running it on a esxi 6.0 environment on a dell poweredge t430. i tried both ubuntu 16 and windows 10.
the problem i have is i forwarded port 443 to my esxi host for remote management. every time i want to connect to my esxi host i get the certificate from my esxi host.
my network configuration port forward:
fritzbox modem:
MumbleTCP TCP 64738 router 64738
MumbleUDP UDP 64738 router 64738
esxi host TCP 443 router 443

router nat rules:
MumbleTCP TCP 64738 mumble server 64738
MumbleUDP UDP 64738 mumble server 64738
esxi host TCP 443 esxi host 443


is there a way to connect to mumble for the certificate over another port then 443?
i added some screenshots to make my problem more clearly.

[kissaki]

I do not really get your problem.
What does Mumble have to do with your esxi administration?