Im trying to run my web server in VPS based on ubuntu 14.04. As i tried before on other systems i can check if my tomcat is fine, by going to _http://myIp:8080 and see "It works" index page, but not this time. And honestly im going crazy because i cant figure whats wrong.
I installed tomcat just with command

 apt-get install tomcat7

All was fine. I checked that port 8080 is open and went to _http://myIp:8080 - and nothing happens. I can't see 404 (that would mean that tomcat managed request) and I cant see "connection failed" (that would mean, that port is closed or thmthng). Connection is just hangs.

I tried to change tomcat port to 1666 (of course, i turned off ufw firewall) Reloaded server, and ROOT deployment was fine again. But i still cant get anything from my server (answer or error) _http://myIp:1666

Here is catalina start log.

And there is nothing except deployment logs.

I have reinstalled tomcat couple of times, but still no result.


i killed my old VPS and created new one. installed tomcat 7 via apt-get again so he is listening to 8080. and here is my grep result

netstat -na | grep -e 1666 -e 8080
tcp6       0      0 :::8080                 :::*                    LISTEN

OMG doez it means that tomcat binds to ipV6 and i trying to get my page via ipV4?


I created senenv.sh for tomcat with

JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true"

and now my tomcat listening to ipv4 tcp. But still no result. When i trying to connect myIP:8080 there is nothing happens/

-na | grep -e 1666 -e 8080
tcp        0      0  *               LISTEN


IT F***g works.
I missed why, i just spend 10 more minutes in internet after restarting tomcat, trying to find something to solve my problem. And then i tried to get myIP:8080 again - and i saw "It works" index page.

  • How did you checked the port is open? where is the socket port binded? localhost? *? your ip? Can you post the output of "ss -lntp | grep -e 1666 -e 8080" or "netstat -na | grep -e 1666 -e 8080"?
    – Idaho06
    Dec 30, 2014 at 18:46
  • updated my question. I checked with ping.eu - this is good site for such sings
    – Asprelis
    Dec 31, 2014 at 8:32

1 Answer 1


Core problem was that tomcat listens to ipv6 tcp port. I tried to get to my page via ipv4 adress. So i created setenv.sh in /usr/share/tomcat7/bin with single line

JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true"

and restarted tomcat via

sudo bash tomcat7 restart

in /etc/init.d Then checked my port again with

netstat -na | grep -e 8080

and saw, that ipv4 is using now

tcp        0      0  *               LISTEN

And after few minutes i could get to my index.html

Thanx @Idaho06 for

netstat -na | grep -e 8080

I would never found problem without it

  • i think it must be setenv.sh, not setenc.sh
    – Lokomotywa
    Apr 19, 2016 at 15:48
  • @ Ferenjito Thanx! Fixed.
    – Asprelis
    Apr 21, 2016 at 11:45
  • @Asprelis can you please share why binding to ipv6 can be a problem? In my case a TCP connection is setup but server doesn't respond back. I would like to dig deeper. Jun 4, 2020 at 12:21

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