[Fiware-creatifi-coaching] [CreatiFI Italy Hub] Unable to connect to Kurento VM on port 8888 in Trento node

[Andrea Maestrini]

Dear FIWARE coach,
we forward you a support request received from a CreatiFI applicant we are
not able to solve.
Please let us know if you need direct contact with the submitter.
Thanks.

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Hello,
We have a blueprint Kurento VM with facing public ip (id:
10c98e76-9fcc-4fb1-9362-2eba51d70ec3). SSH connection works fine but
Kurento on port 8888 is unreachable.
We have the port open in the security group assigned to the machine (see
screenshots).

UFW and iptables rules seems ok:

root at kurento:~# ufw status
Status: inactive

root at kurento:~# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Kurento is clearly listening on port 8888:

root at kurento:~# netstat -tpln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address
State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*
LISTEN      864/sshd
tcp6       0      0 :::22                   :::*
LISTEN      864/sshd
tcp6       0      0 :::8888                 :::*
LISTEN      906/kurento-media-s

IPV6 is disabled as per default, we tried to enable it and reboot but it
made no difference:

root at kurento:~# cat /etc/sysctl.conf | grep net.ipv6
#net.ipv6.conf.all.forwarding=1
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
#net.ipv6.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_source_route = 0

root at kurento:~# cat /proc/sys/net/ipv6/conf/all/disable_ipv6
1

I think is a routing problem.
Do you suggest anything I can try?

Thanks,

Gabriele

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