Openhab 3.3 on docker - UI not responding - ignoring IP?


I am trying to install openhab 3.3 on docker. Everything seems to work fine but I do not get access to the UI.

What I found ou so far is:
netstat -lnp | grep 8080
tcp6 0 0 :::8080 :::* LISTEN 40369/java

On port 40369 there is openhab:
ps -ef | grep 40369
9001 40369 39497 27 11:36 ? 00:03:20 /usr/lib/jvm/temurin-11-jdk-amd64/bin/java -XX:-UsePerfData -Dopenhab.home=/openhab -Dopenhab.conf=/openhab/conf -Dopenhab.runtime=/openhab/runtime -Dopenhab.userdata=/openhab/userdata -Dopenhab.logdir=/openhab/userdata/logs -Djava.library.path=/openhab/userdata/tmp/lib -Djetty.http.compliance=RFC2616 -Dnashorn.args=–no-deprecation-warning -Dorg.apache.cxf.osgi.http.transport.disable=true -Dorg.ops4j.pax.web.listening.addresses= -Dorg.osgi.service.http.port=8080 -Djava.awt.headless= <…>

But on other docker containers the are two entries (tcp and tcp6):
netstat -lnp | grep 8086
tcp 0 0* LISTEN 39074/docker-proxy
tcp6 0 0 :::8086 :::* LISTEN 39080/docker-proxy

Strange - has this something to do with this openhab.log-entry:
[WARN ] [ ] - Found multiple local interfaces - ignoring
But I found comments to this issue that this is just a warning and causes no problem. Really?
Is there any way to force openhab to use a specific IP?

The ports are set to default - 8080 and 8433.

So is there something on these ports:
curl :8080
<!doctype html>openHAB

curl :8443
curl: (1) Received HTTP/0.9 when not allowed

I do not use DNS in the URL, just http://:8080. No Access.

What is going on here? Any hints?

Thank you,

Solution found: ufw blocks 8080 and 8443 (and other ports I have tried)

So if someone has a simular problem - check firewall!