tomcat7 - unable to connect remotely to server (port 8080: Connection refused)

Question

I am using PerfSONAR a network measurement tool, which has a UI that depends on tomcat7. I installed the perfsonar-ui on an Ubuntu 14.04 server, and to test my installation I pointed my browser (on a windows 7 machine) to the address http://my_server_address:8080/perfsonar-ui/. The connection failed.

What I tried so far:

• pings from multiple machines to my server were successful.
• on the server itself, curl -X GET http://localhost:8080/perfsonar-ui/, response status OK (200)

• on other servers, curl -X GET http://my_server_address:8080/perfsonar-ui/ results in:

  curl: (7) Failed to connect to my_server_address port 8080: Connection refused

• allowed port 8080 on the server sudo ufw allow 8080

• disabled the firewall on the server sudo ufw disable

• i am binding to 0.0.0.0, so the connector from my /etc/tomcat7/server.xml file looks like:

  <Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" address="0.0.0.0" />

• netstat -ntlp | grep LISTEN result:

  tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN -

Still not working! :(

Can someone help me troubleshoot the issue, please? Thanks.

Answer 1

I have found a alternate solution just replacing the port 8080 with the port 80 in server.xml in tomcat conf. Then stop and start the tomcat server again. It is tested on Ubuntu 16.4 server.

ORIGINAL: Connector port="8080" protocol="HTTP/1.1"

MODIFIED: Connector port="80" protocol="HTTP/1.1"

It works for me when i access remote tomcat sever using CURL from my website.

API URL should be "http://xxx.xxx.xxx.xxx/api/24" in place of "http://xxx.xxx.xxx.xxx:8080/api/24"

Answer 2

I am closing this. It had nothing to do with tomcat. It was an iptables issue, I had to allow incoming connections to destination port 8080. It worked!