Weird issue I'm facing currently! There is nothing running on port 80.
Still curl gives 404 page not found. I can telnet to port 80 and even start a container exposing port 80 (host). But no requests reaches the container!
Any idea what might be going on? How do I debug this?
$ netstat -tulpn | grep :80
tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN -
tcp6 0 0 :::8000 :::* LISTEN -
$ curl localhost
404 page not found
Best Answer
In addition to Matthew's comment suspecting internal nat redirect
iptables -vnL -t nat
ornft list ruleset ip
perhaps you could directly inspect port 80. These are some of the ways to do that:
ss -4tlnp -o state LISTENING '( sport = :80 )'
lsof -i:80
curl -v http://localhost:80