Not able to connect to Tomcat7 server on Ubuntu linux...

Question

Hello,

We are trying to provision BigBlueButton on Ubuntu 14.0LTS. However, no matter what, I can't connect to any of the webservers nginx on 80 and tomcat7 on 8080 port. I have already set up necessary endpoints. I am consistently getting "Connection timed out" error. I have already ensured that firewall on VM is Off. Tomcat7 has connector configured for all IPs. It is also running and listening. I can curl to it from within the VM. However, no luck when trying to access from outside.

What could be potential issues?

Thanks,

Saurabh

Answer 1

Hi Saurabh,

Thanks for posting here.

We are looking into this and will update with solution at the earliest.

Girish Prajwal

Answer 2

Thanks so much! I am eagerly waiting to hear from you. This is a pressing issue.

- Saurabh

Answer 3

Hi Saurabh,

We would like to hear from you on the below queries :

What is BigBlueButton ?

Are the EndPoints configured correctly? Internal/external

iptables –list shows firewall is off ?

Can you telnet port 80 locally and show the output ?

Are you connecting using the VIP address.

If you tcpdump on the port you are trying to connect to do you see pkts arrive?

You are obviously able to connect via ssh into the VM so connectivity is working.

Port 80 and 8080 are webservers are not allowing you to connect?

Have you checked the configurations for the respective web servers?

Answer 4

Answers to your questions:

BigBlueButton is a open source web conferencing system. Supposed to be run on Ubuntu.

Yes, endpoints seem to be configured correctly.

iptables list shows no entries, firewall is disabled. UFW command confirms that.

Yes, I am connecting using VIP.

Checked, Port 80 and 8080 are webservers and allowed to connect.

Verified through tcpdump, no packets arriving on the server on port 80.

Interestingly, I created a VM on AmazonEC2 using same rules, everything thing works there.

My hunch is, it has something to do with Azure. Just in case it helps, both the VMs have been created using resource group and using Azure Preview Portal.

Thanks!

Answer 5

Hi Saurabh,

Thanks for the response. We will get back to you for any information or findings.

Regards,

Shirsha Paderu

Answer 6

Hi Saurabh, 

Can you post the results of these commands: 

sudo netstat -aonp | grep nginx

sudo netstat -aonp | grep java 

sudo bbb-conf --check

We were not able to reproduce the issue on our side. We followed the instructions provided here: http://docs.bigbluebutton.org/install/install.html and added tcp endpoints as mentioned in the page and are able to reach the server on both port 80 and 8080.

Regards,

Srikanth

Answer 7

Hi Saurabh,

Can we have an update on this as the query been escalated to the next level for further analysis.

Girish Prajwal

Answer 8

Hi Girish,

Thanks for following up on this!

Sorry, I have been keeping busy with few other priority activities. I will get back to you after running these commands later today.

Thanks,

Saurabh

Answer 9

Hi,

Finally I have been able to make BBB run just fine. I deleted the old VM and started with a new one. Did everything again. This time it worked!

Thanks a lot for your help.

Thanks,

Saurabh