Jenkins behaviour with github webhook and github service

[Ramanathan Muthaiah]

Hi All,

Am working to setup webhook trigger between github enterprise and Jenkins. 

As part of this, enabled AWS SNS in Github repo and have Lambda subscribed to the AWS SNS topic. 

With this setup in place, on Jenkins side, in the job (where build should be triggered automatically) these two options were enabled.

"Github Project" 

"GitHub hook trigger for GITScm polling"

Is it correct to assume that with the service option enabled (with SNS in this case) and turning on these features in the specific job, will enable Jenkins to trigger the job when the event from Github is passed to the Jenkins server?

Or the two features will work only if webhook is enabled in github repo by setting the webhook URL, like, http://my-jenkins-server.com/github-webhook/?

/Ram