Failed to publish artifacts with Nexus beind https - ant

Question

Having problem publishing artifact using Ivy with an Ant script. I have the Nexus sits behind a HTTPS reverse proxy. The credentials provided in ivysettings has system admin which I managed to retrieve artifacts out of it.
Ant script returns this error when ivy:publish was called
impossible to publish artifacts for [org]#[module];working#[client-machine]: java.io.IOException: Error writing to server
at sun.net.www.protocol.http.HttpURLConnection.writeRequests(HttpURLConnection.java:699)
at sun.net.www.protocol.http.HttpURLConnection.writeRequests(HttpURLConnection.java:711)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1567)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.apache.ivy.util.url.BasicURLHandler.upload(BasicURLHandler.java:225)
at org.apache.ivy.util.url.URLHandlerDispatcher.upload(URLHandlerDispatcher.java:82)
at org.apache.ivy.util.FileUtil.copy(FileUtil.java:148)
at org.apache.ivy.plugins.repository.url.URLRepository.put(URLRepository.java:84)
at org.apache.ivy.plugins.repository.AbstractRepository.put(AbstractRepository.java:130)
at org.apache.ivy.plugins.resolver.RepositoryResolver.put(RepositoryResolver.java:234)
at org.apache.ivy.plugins.resolver.RepositoryResolver.publish(RepositoryResolver.java:216)
at org.apache.ivy.plugins.resolver.ChainResolver.publish(ChainResolver.java:244)
at org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:281)
at org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:260)
at org.apache.ivy.core.publish.PublishEngine.publish(PublishEngine.java:172)
at org.apache.ivy.Ivy.publish(Ivy.java:600)
at org.apache.ivy.ant.IvyPublish.doExecute(IvyPublish.java:311)
at org.apache.ivy.ant.IvyTask.execute(IvyTask.java:277)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398)
at net.sf.antcontrib.logic.ForTask.doSequentialIteration(ForTask.java:259)
at net.sf.antcontrib.logic.ForTask.doToken(ForTask.java:268)
at net.sf.antcontrib.logic.ForTask.doTheTasks(ForTask.java:299)
at net.sf.antcontrib.logic.ForTask.execute(ForTask.java:244)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:390)
at org.apache.tools.ant.Target.performTasks(Target.java:411)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.apache.tools.ant.Main.runBuild(Main.java:809)
at org.apache.tools.ant.Main.startAnt(Main.java:217)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
This is the only log being captured with the publish.
2017-11-06 13:27:21 WARN [AuthtokenFetcherImpl-task] MY_USERNAME com.sonatype.central.secure.nexus.plugin.internal.AuthtokenFetcherImpl - Failed to fetch authtoken: org.apache.http.conn.ConnectTimeoutException: Connect to secure.central.sonatype.com:443 [secure.central.sonatype.com/207.223.241.90] failed: connect timed out