Firewall – Unable to browse tomcat from web browser in EC2

amazon ec2firewallsecurity-groupstomcat8

I have configured Security Groups, my tomcat is running in 8080 port. But I am unable to browse from web browser.

Please anyone there to help me ?

Public IP is : 52.39.220.183

When I do curl http://localhost:8080 in EC2 instance then I can see the home page of tomcat, if I do curl 52.39.220.183:8080, then I get Failed to connect to 52.39.220.183 port 8080: Connection timed out.

Best Answer

It was my mistake, the Instance was associated with another Security Group.

First need to check the instance is taking which Security Group.

Instance >> Network interfaces >> eth0 (Clicking on etho pop ups the box and at the bottom, it shows the associated Security Group).

And of course we need to define Inbound request.

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Installing Tomcat

# make the directory that is going to hold tomcat
sudo mkdir /opt/tomcat
cd /opt/tomcat
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unzip tomcat6.zip
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# then start tomcat.
sudo /opt/tomcat/apache-tomcat-.../bin/startup.sh

I later change it to use sudo wget http://apache.tradebit.com/pub/tomcat/tomcat-7/v7.0.16/bin/apache-tomcat-7.0.16.tar.gz

At this point, you should be able to hit http:/// and get the tomcat management page.

Installing Sun JDK 6 Download Sun JDK 6. You must agree to the terms and conditions in order to download, so I think you'll have to download and then sftp it over. I downloaded from http://www.oracle.com/technetwork/java/javase/downloads/jdk-6u26-download-400750.html the 32 bit .bin version.

unzip the jdk into /opt/jdk1.6.xxx and then install it as a java alternative using the following:

sudo alternatives --install /usr/bin/java java /opt/jdk1.6.0_26/bin/java 1500
sudo alternatives --install /usr/lib/jvm/jre jre /opt/jdk1.6.0_26 1500
sudo alternatives --set java /opt/jdk1.6.0_26/bin/java
sudo alternatives --set jre /opt/jdk1.6.0_26

Then make sure you are running java by checking java -version. Since tomcat will be starting as root, I used sudo to test it.

$ sudo java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)

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Some clients don't properly close the TCP connection when they're done. That's out of your control. These generally time out after a bit, and don't create too much of a problem, other than cluttering the listing you get from netstat -an and similar.

So, why you are having a problem with it?

This might be pertinent: What limits the maximum number of connections on a Linux server?

Best Answer

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