'Cant reach 3rd Party App from Docker container

I have an application where I have multiple instances of container talking with each other and another external application. My external application is on 10.139.74.xxx and my application is on 10.139.75.xxx. I am able to reach the external application from my application server but I am not able to reach the external application from within my docker container. I am using REST API calls on the external application form my docker containers. Please help me.

dockernetwork-programmingdocker-swarm


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