Connection to https://repo1.maven.org refused while running gradle build

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I have configured gradle in eclipse and setup proxy in eclipse>preferences>General>network connections>manual proxy. I also confirmed whether eclipse marketplace is accessible. still after running gradle build getting following error :Connection to https://repo1.maven.org refused :
PF my gradle script below - Anyone has clue what am I missing in configuration. If eclipse marketplace is accessible that means my proxy is working fine so this maven central url https://repo1.maven.org should also be accessible. waiting for you suggestions.

apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'war'

repositories {
   mavenLocal()
   mavenCentral()
}

// Uses JDK 7
sourceCompatibility = 1.7
targetCompatibility = 1.7

dependencies {

compile "axiom:axiom.jar"
compile "com.azalea.ufl:com.azalea.ufl.barcode.1.0.jar"
compile "commons:commons-codec-1.3.jar"
compile "commons:commons-collections-3.1.jar"
compile "commons:commons-configuration-1.2.jar"
compile "commons:commons-io-1.4.jar"
compile "commons:commons-lang-2.1.jar"
compile "commons:commons-logging.jar"
compile "Crystal:CrystalCommon2.jar"
compile "Crystal:CrystalReportsRuntime.jar"
compile "cvom:cvom.jar"
compile "Database:DatabaseConnectors.jar"
compile "icu4j:icu4j.jar"
compile "iText:iText-2.1.5.jar"
compile "jai:jai_imageio.jar"
compile "jaxen:jaxen-core.jar"
compile "jaxen:jaxen-jdom.jar"
compile "JDBInterface:JDBInterface.jar"
compile "jdom:jdom.jar"
compile "jrcerom:jrcerom.jar"
compile "keycode:keycodeDecoder.jar"
compile "log:log4j.jar"
compile "logging:logging.jar"
compile "ojbc:ojdbc14.jar"
compile "pfj:pfjgraphics.jar"
compile "Query:QueryBuilder.jar"
compile "sax:saxpath.jar"
compile "spring:spring-webmvc-2.5.6.jar"
compile "spring:spring-ws-1.5.6-all.jar"
compile "spring:spring.jar"
compile "web:webreporting-jsf.jar"
compile "web:webreporting.jar"
compile "wstx:wstx-asl-3.2.4.jar"
compile "XML:XMLConnector.jar"
compile "xpp:xpp3-without-QName.jar"
compile "xstream:xstream-1.4.8.jar"

runtime "wsdl:wsdl4j.jar"
    
}

version = '1.0'

jar {
baseName = 'com.abc.test_dep.war'
version =  '0.1.0'
}

war.archiveName "com.abc.test.war"

task dist(dependsOn: 'war') << {
    copy {
        from war.archivePath
        into "dist/"
    }
}