I thank you for the reply.
I purchased a registration with no-ip.com which gives me a FQDN and a
static IP address; I used the FQDN when I installed jitsi-meet.
I configured ipFire to update no-ip.com if the ip address changes. I
planned to put the jitsi server on the ORANGE (DMZ) port of ipfire.
I live in a rural area, with a microwave link to my ISP. The tower of
my ISP is only a mile or two away; the ISP is a small outfit with only a
few customers, so perhaps I can get more upload bandwidth if I need it.
My goal is simply one-on-one communication for my personal use, and not
conferencing. I thought it would be interesting to run my own jitsi
server, rather than use Ekiga. I am running Debian 9 on i386 and amd64