Unable to connect to Selenium Grid running on AWS EC2


I have a Selenium Grid up and running on an AWS EC2 instance. I would like to connect to this from my local machine using Java to fire off my tests via a RemoteWebDriver, however, I'm unable to connect to the server be it through SSH or the Public IP.

For example I need to access the instance on port <em>4444</em> for a url of <a href="http://123.456.78.910:4444/wd/hub" rel="nofollow">http://123.456.78.910:4444/wd/hub</a> this would then need to establish a connection and receive my tests.

Whenever I try to use the Public IP I simply get a time-out.

Any help would be greatly appreciated.


You are getting a time out because your port 4444 is blocked in the EC2 security group. Check below you have add that rule to you EC2 security group. You can either add but I will suggest just add your IP as you will be the only one to access that port from your local and for better security.

<a href="https://i.stack.imgur.com/eo2m0.png" rel="nofollow"><img alt="enter image description here" class="b-lazy" data-src="https://i.stack.imgur.com/eo2m0.png" data-original="https://i.stack.imgur.com/eo2m0.png" src="https://etrip.eimg.top/images/2019/05/07/timg.gif" /></a>


When you start a selenium grid hub - you are shown a message such as : register node to the hub: http://{hub-ip}:4444/grid/register

When i tried to register a node with hub-ip , it did not work for me. so i checked the public-ip of my ec2 instance by logging in to the ec2 console.

then i registered the node with http://{public-ip}:4444/grid/register it worked.

so use public ip of ec2 instance to register the node. the hub-ip duggested by selenium grid did not work for me on ec2

if i place hub , node on local machine - then none of this problem occurs.

are you running node and hub on different ec2 instances ? You should also add the <strong>remotehost</strong> option while starting a node from an instance different from the hub instance to tell the hub about your ip address.

java -Dwebdriv.gecko.driver="geckodriver" -jar selenium-server-standalone-3.13.0.jar -role node -hub http://{hub-public-ip}:4444/grid/register/ -remoteHost "http://{node-public-ip}" public ip of script instance -


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