Jenkins: Ionic android build failed

I am beginner of ionic mobile development and now I am setting CI for my mobile application using Jenkins (on localhost). I am facing an error that I am unable to resolve for many days. ionic compiles successfully but at the last at the time of android build preparation it fails and gives error I mentioned below.

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all files for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:3.0.0.
     Required by:
         project :
      > Could not resolve com.android.tools.build:gradle:3.0.0.
         > Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
            > Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
               > corphttpsproxyhost.yourdomain: Name or service not known
      > Could not resolve com.android.tools.build:gradle:3.0.0.
         > Could not get resource 'https://maven.google.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
            > Could not GET 'https://maven.google.com/com/android/tools/build/gradle/3.0.0/gradle-3.0.0.pom'.
               > corphttpsproxyhost.yourdomain

Please let me know where I am committing mistake, or is there any other dependency issue.

Thanks

from Jenkins: Ionic android build failed